Inspire | HepData | arXiv:1704.01530 [hep-ex] | submitted to JHEP
A measurement of the splitting scales occuring in the $k_\text{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb$^{-1}$ of proton-proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\text{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables. If no mode specified, will try to fill both electron and muon plots. If EL or MU is specified, only the relevant plots will be filled.
Inspire | HepData | arXiv:1702.05725 [hep-ex] | submitted to EPJC
Measurements of the production cross section of a $Z$ boson in association with jets in proton-proton collisions at i $\sqrt{s}=13$ TeV are presented, using data corresponding to an integrated luminosity of 3.16 fb${}^{-1}$ collected by the ATLAS experiment at the CERN Large Hadron Collider in 2015. Inclusive and differential cross sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to seven jets with $p_\text{T}>30$ GeV and $|y|<2.5$. Predictions from different Monte Carlo generators based on leading-order and next-to-leading-order matrix elements for up to two additional partons interfaced with parton shower and fixed-order predictions at next-to-leading order and next-to-next-to-leading order are compared with the measured cross sections. Good agreement within the uncertainties is observed for most of the modelled quantities, in particular with the generators which use next-to-leading-order matrix elements and the more recent next-to-next-to-leading-order fixed-order predictions.
Inspire | HepData | Eur. Phys. J. C77 (2017) no.6, 367 | doi:10.1140/epjc/s10052-017-4911-9 | arXiv:1612.03016 [hep-ex]
High-precision measurements by the ATLAS Collaboration are presented of inclusive $W^+\to\ell^+$, $W^-\to\ell^-$, $Z/\gamma^\ast\to\ell\ell$ ($\ell=e,\mu$) Drell-Yan production cross sections at the LHC. The data were collected in proton-proton collisions at $\sqrt{s}=7$ TeV with an integrated luminosity of 4.6 fb${}^{-1}$. Differential $W^+$ and $W^-$ cross sections are measured in a lepton pseudorapidity range $|\eta_\ell| < 2.5$. Differential $Z/\gamma^\ast$ cross sections are measured as a function of the absolute dilepton rapidity, for $|y_{\ell\ell}| < 3.6$, for three intervals of dilepton mass, $m_{\ell\ell}$, extending from 46 to 150 GeV. The integrated and differential electron- and muon-channel cross sections are combined and compared to theoretical predictions using recent sets of parton distribution functions. The data, together with the final inclusive $e^\pm p$ scattering cross-section data from H1 and ZEUS, are interpreted in a next-to-next-to-leading-order QCD analysis, and a new set of parton distribution functions, ATLAS-epWZ16, is obtained. The ratio of strange-to-light sea-quark densities in the proton is determined more accurately than in previous determinations based on collider data only, and is established to be close to unity in the sensitivity range of the data. A new measurement of the CKM matrix element $|V_{cs}|$ is also provided. N.B.: Use :LMODE to choose specify the signature decay channel directly. Default, run everything, assuming all decay modes are generated Contains Z (W): fill only Z (W) signature histgrams Contains EL (MU): assume only electron (muon) decay modes are being generated.
Inspire | HepData | Phys. Lett. B 762 (2016) 1 | arXiv:1606.04017 [hep-ex] | doi:10.1016/j.physletb.2016.08.052
The production of $W^\pm Z$ events in proton--proton collisions at a centre-of-mass energy of 13 TeV is measured with the ATLAS detector at the LHC. The collected data correspond to an integrated luminosity of 3.2 fb${}^{-1}$ . The $W^\pm Z$ candidates are reconstructed using leptonic decays of the gauge bosons into electrons or muons. The measured inclusive cross section in the detector fiducial region for leptonic decay modes is $\sigma(W^\pm Z\to\ell^\prime\nu\ell\ell \text{fid.}) = 63.2\pm 3.2$(stat.)$\pm 2.6$(sys.)$\pm 1.5$(lumi.) fb. In comparison, the next-to-leading-order Standard Model prediction is 53.4-2.8+3.6 fb. The extrapolation of the measurement from the fiducial to the total phase space yields $\sigma(W^\pm Z\text{tot.})=50.6\pm 2.6$(stat.)$\pm 2.0$(sys.)$\pm 0.9$(th.)$\pm 1.2$(lumi.) pb, in agreement with a recent next-to-next-to-leading-order calculation of 48.2-1.0+1.1 pb. The cross section as a function of jet multiplicity is also measured, together with the charge-dependent $W^+Z$ and $W^-Z$ cross sections and their ratio. Users should note that explicit matching of lepton flavour between individual SM neutrinos and charged leptons is used in this analysis routine, to match the MC-based correction to the fiducial region applied in the paper. The data are therefore only valid under the assumption of the Standard Model and cannot be used for BSM reinterpretation.
Inspire | HepData | JHEP 1608 (2016) 009 | doi:10.1007/JHEP08(2016)009 | arXiv:1606.01736 [hep-ex]
This paper presents a measurement of the double-differential cross section for the Drell-Yan $Z/\gamma^\ast \rightarrow \ell^+\ell^-$ and photon-induced $\gamma\gamma \rightarrow \ell^+\ell^-$ processes where $\ell$ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, $m_{\ell\ell}$, between 116 GeV and 1500 GeV using a sample of 20.3 fb$^{-1}$ of pp collisions data at centre-of-mass energy of $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of $m_{\ell\ell}$ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1\% is achieved at low $m_{\ell\ell}$. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated. Decay channel (e or mu) is selected by LMODE=EL,MU
Inspire | HepData | Phys. Rev. D 93, 092004 (2016) | arXiv:1603.02151 [hep-ex] | doi:10.1103/PhysRevD.93.092004
This paper presents measurements of $W^\pm Z$ production in pp collisions at a center-of-mass energy of 8 TeV. The gauge bosons are reconstructed using their leptonic decay modes into electrons and muons. The data were collected in 2012 by the ATLAS experiment at the Large Hadron Collider and correspond to an integrated luminosity of 20.3 fb${}^{-1}$. The measured inclusive cross section in the detector fiducial region is $\sigma(W^\pm Z\to \ell^\prime\nu\ell\ell) = 35.1\pm 0.9$(stat)$\pm 0.8$(sys)$\pm 0.8$(lumi) fb, for one leptonic decay channel. In comparison, the next-to-leading-order Standard Model expectation is $30.0\pm 2.1$ fb. Cross sections for $W^+ Z$ and $W^- Z$ production and their ratio are presented as well as differential cross sections for several kinematic observables. Limits on anomalous triple gauge boson couplings are derived from the transverse mass spectrum of the $W^\pm Z$ system. From the analysis of events with a $W$ and a $Z$ boson associated with two or more forward jets an upper limit at 95% confidence level on the $W^\pm Z$ scattering cross section of 0.63 fb, for each leptonic decay channel, is established, while the Standard Model prediction at next-to-leading order is $0.13\pm 0.01$ fb. Limits on anomalous quartic gauge boson couplings are also extracted. For distributions that include the infinity symbol ($\infty$) on the horizontal axis, the last bin will include the events from the overflow bin. Users should note that explicit matching of lepton flavour between individual SM neutrinos and charged leptons is used in this analysis routine, to match the MC-based correction to the fiducial region applied in the paper. The data are therefore only valid under the assumption of the Standard Model and cannot be used for BSM reinterpretation.
Inspire | HepData | JHEP 1609 (2016) 029 | doi:10.1007/JHEP09(2016)029 | arXiv:1603.01702 [hep-ex]
The production of $W$ boson pairs in proton--proton collisions at $\sqrt{s} = 8$ TeV is studied using data corresponding to 20.3 fb${}^{-1}$ of integrated luminosity collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The $W$ bosons are reconstructed using their leptonic decays into electrons or muons and neutrinos. Events with reconstructed jets are not included in the candidate event sample. A total of 6636 $WW$ candidate events are observed. Measurements are performed in fiducial regions closely approximating the detector acceptance. The integrated measurement is corrected for all acceptance effects and for the $W$ branching fractions to leptons in order to obtain the total $WW$ production cross section, which is found to be $71.1 \pm 1.1$ (stat) ${}^{+5.7}_{-5.0}$ (syst) $\pm 1.4$ (lumi) pb. This agrees with the next-to-next-to-leading-order Standard Model prediction of $63.2 {}^{+1.6}_{-1.4}$ (scale) $\pm 1.2$ (PDF) pb. Fiducial differential cross sections are measured as a function of each of six kinematic variables. The distribution of the transverse momentum of the leading lepton is used to set limits on anomalous triple-gauge-boson couplings.
Measurement of transverse event-shape observables ($N_\text{ch}$, $\sum p_\perp$, thrust, beam-thrust, $F$-parameter, and spherocity) in $Z \to \ell\ell$ events at 7 TeV for different $p_\perp(Z)$ regions.
Inspire | HepData | arXiv:1512.02192 [hep-ex] | submitted to EPJC
Distributions of transverse momentum $p_\text{T}^{\ell\ell}$ and the angular variable $\phi^\ast_\eta$ of Drell-Yan lepton pairs are measured in $20.3\,\text{fb}^{-1}$ of proton-proton collisions at $\sqrt{s}=8$\,TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects. Compared to previous measurements in proto--proton collisions at $\sqrt{s}=7$TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the $Z$-boson mass peak. Specify the lepton channel (default is Z->ee) by using the LMODE variable. Only individual channels are available as particle-level measurements.
Inspire | HepData | arXiv:1503.03709 [hep-ex] | JHEP 09 (2015) 049 | doi:10.1007/JHEP09(2015)049
Measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction $pp \rightarrow Z / \gamma^\ast \rightarrow \ell^+\ell^-$, with $\ell$ being electrons or muons. The results are based on the full set of data collected in 2011 in $pp$ collisions at the LHC at $\sqrt{s} = 7$ TeV, corresponding to an integrated luminosity of 4.8 $\text{fb}^{-1}$. The measured asymmetry values are found to be in agreement with the corresponding Standard Model predictions. The default routine will pick up the electron decay channel of the $Z$ boson. Individual channels can be specified directly with the plugins ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU, respectively. N.B. When running on multiple files, the asymmetry might have to be reconstructed in a post-processing step. To that end, the necessary Histo1D objects are written out as well. The asymmetry is a Scatter2D objects ending in y01 and is constructed from the Histo1D objects (ending in y02 and y03) in the following way: y01 = (y02 - y03) / (y02 + y03)
Inspire | HepData | arXiv:1503.03709 [hep-ex] | JHEP 09 (2015) 049 | doi:10.1007/JHEP09(2015)049
Measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction $pp \rightarrow Z / \gamma^\ast \rightarrow \ell^+\ell^-$, with $\ell$ being electrons or muons. The results are based on the full set of data collected in 2011 in $pp$ collisions at the LHC at $\sqrt{s} = 7$ TeV, corresponding to an integrated luminosity of 4.8 $\text{fb}^{-1}$. The measured asymmetry values are found to be in agreement with the corresponding Standard Model predictions. The default routine will pick up the electron decay channel of the $Z$ boson. Individual channels can be specified directly with the plugins ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU, respectively. N.B. When running on multiple files, the asymmetry might have to be reconstructed in a post-processing step. To that end, the necessary Histo1D objects are written out as well. The asymmetry is a Scatter2D objects ending in y01 and is constructed from the Histo1D objects (ending in y02 and y03) in the following way: y01 = (y02 - y03) / (y02 + y03)
ATLAS-CONF-2015-041
Preliminary measurements of the cross-section for the production of a $Z$ boson in association with jets in $pp$ collisions at $\sqrt{s} = 13$\,TeV are presented, using data corresponding to an integrated luminosity of $85\,\text{pb}^{-1}$ collected by the ATLAS experiment at the Large Hadron Collider. The cross-sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to four jets in the kinematical range of $p_\text{T} > 30$\,GeV and $|y| < 2.5$. NB--Use the plugin names ATLAS_2015_CONF_2015_041_EL or ATLAS_2015_CONF_2015_041_MU to specify the lepton channel. Note: this analysis is superseded by ATLAS_2017_I1514251.
Inspire | HepData | Eur.Phys.J. C75 (2015) 82 | doi:10.1140/epjc/s10052-015-3262-7 | arXiv:1409.8639 [hep-ex]
Measurements of cross sections for the production of a $W$ boson in association with jets in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. With an integrated luminosity of 4.6 $\text{fb}^{-1}$, this data set allows for an exploration of a large kinematic range, including jet production up to a transverse momentum of 1 TeV and multiplicities up to seven associated jets. The production cross sections for W bosons are measured in both the electron and muon decay channels. Differential cross sections for many observables are also presented including measurements of the jet observables such as the rapidities and the transverse momenta as well as measurements of event observables such as the scalar sums of the transverse momenta of the jets. The default routine assumes both muon and electron decay channel of the $W$ boson are being generate and the average will be constructed. Individual lepton channels can be specified using options LMODE=EL and LMODE:MU respectively.
Inspire | HepData | Eur.Phys.J. C74 (2014) 3195 | doi:10.1140/epjc/s10052-014-3195-6 | arXiv:1409.3433 [hep-ex]
Charged-particle distributions sensitive to the properties of the underlying event are measured for an inclusive sample of events containing a $Z$-boson, decaying to an electron or muon pair. The measurement is based on data collected using the ATLAS detector at the LHC in proton--proton collisions at a centre-of-mass energy of 7 TeV with an integrated luminosity of 4.6 fb$^{-1}$. Distributions of the charged particle multiplicity and of the charged particle transverse momentum are measured in regions of azimuthal angle defined with respect to the $Z$-boson direction.
Inspire | HepData | Eur.Phys.J. C74 (2014) 3168 | doi:10.1140/epjc/s10052-014-3168-9 | arXiv:1408.6510 [hep-ex]
Measurements of the ratio of the production cross sections for $W$ and $Z$ bosons in association with jets in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is based on the entire 2011 dataset, corresponding to an integrated luminosity of $4.6\text{fb}^{-1}$. Inclusive and differential cross-section ratios for massive vector bosons decaying to electrons and muons are measured in association with jets with transverse momentum $p_\text{T} > 30$ GeV and jet rapidity $|y| < 4.4$. The default routine will pick up the electron decay channel of the heavy bosons and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly. NB #1: The "x01" Scatter2D objects are constructed from the ratio of "x02" to "x03" Histo1D objects. If several output yoda files are merged with yodamerge, the merged "x01" objects will become meaningless. New "x01" Scatter2Ds can easil be constructed in a postprocessing step from the merged "x02" (nominator) and "x03" (denominator) objects. NB #2: Special care ought to be taken when evaluating theoretical uncertainties due to potential cancellations/correlations between numerator and denominator.
Inspire | HepData | Eur.Phys.J. C74 (2014) 3168 | doi:10.1140/epjc/s10052-014-3168-9 | arXiv:1408.6510 [hep-ex]
Measurements of the ratio of the production cross sections for $W$ and $Z$ bosons in association with jets in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is based on the entire 2011 dataset, corresponding to an integrated luminosity of 4.6$\text{fb}^{-1}$. Inclusive and differential cross-section ratios for massive vector bosons decaying to electrons and muons are measured in association with jets with transverse momentum $p_\text{T} > 30$ GeV and jet rapidity $|y| < 4.4$. The default routine will pick up the electron decay channel of the heavy bosons and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly. NB #1: The "x01" Scatter2D objects are constructed from the ratio of "x02" to "x03" Histo1D objects. If several output yoda files are merged with yodamerge, the merged "x01" objects will become meaningless. New "x01" Scatter2Ds can easil be constructed in a postprocessing step from the merged "x02" (nominator) and "x03" (denominator) objects. NB #2: Special care ought to be taken when evaluating theoretical uncertainties due to potential cancellations/correlations between numerator and denominator.
Inspire | HepData | Eur.Phys.J. C74 (2014) 3168 | doi:10.1140/epjc/s10052-014-3168-9 | arXiv:1408.6510 [hep-ex]
Measurements of the ratio of the production cross sections for $W$ and $Z$ bosons in association with jets in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is based on the entire 2011 dataset, corresponding to an integrated luminosity of $4.6\text{fb}^{-1}$. Inclusive and differential cross-section ratios for massive vector bosons decaying to electrons and muons are measured in association with jets with transverse momentum $p_\text{T} > 30$ GeV and jet rapidity $|y| < 4.4$. The default routine will pick up the electron decay channel of the heavy bosons and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly. NB #1: The "x01" Scatter2D objects are constructed from the ratio of "x02" to "x03" Histo1D objects. If several output yoda files are merged with yodamerge, the merged "x01" objects will become meaningless. New "x01" Scatter2Ds can easil be constructed in a postprocessing step from the merged "x02" (nominator) and "x03" (denominator) objects. NB #2: Special care ought to be taken when evaluating theoretical uncertainties due to potential cancellations/correlations between numerator and denominator.
Inspire | HepData | arXiv:1407.3643 [hep-ex] | JHEP 1410 (2014) 141
Measurements of differential production cross-sections of a $Z$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=7$ TeV are reported. The data analysed correspond to an integrated luminosity of 4.6 fb$^{-1}$ recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a $Z$ boson decaying into an electron or muon pair, and containing $b$-jets. For events with at least one $b$-jet, the cross-section is presented as a function of the $Z$ boson transverse momentum and rapidity, together with the inclusive $b$-jet cross-section as a function of $b$-jet transverse momentum, rapidity and angular separations between the $b$-jet and the $Z$ boson. For events with at least two $b$-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum $b$-jets, and as a function of the $Z$ boson transverse momentum and rapidity. Results are compared to leading-order and next-to-leading-order perturbative QCD calculations. This Rivet module implements the event selection for Z decaying into electrons. If you want to use muonic events, please refer to ATLAS\_2014\_I1306294\_MU
Inspire | HepData | JHEP09(2014)145 | arXiv:1406.3660 [hep-ex]
A measurement of the $Z/\gamma^*$ transverse momentum spectrum using ATLAS proton-proton collision data at a center of mass energy of $\sqrt{s} = 7{\text{TeV}}$ at the LHC. The measurement is performed in both $Z/\gamma^* \rightarrow ee$ and $Z/\gamma^* \rightarrow \mu \mu$ channels.
Inspire | HepData | JHEP06(2014)112 | doi:10.1007/JHEP06(2014)112 | arXiv:1404.1212 [hep-ex]
Measurements of the differential cross section for the process $Z/\gamma^\ast \rightarrow l$ $(l = e, \mu)$ as a function of dilepton invariant mass in pp collisions at $\sqrt{s} = 7$ TeV. The measurement is performed in the $e$ and $\mu$ channels for invariant masses between 26 GeV and 66 GeV in the fiducial region $p_\text{T}^\text{leading} > 15$ GeV, $p_\text{T}^\text{subleading} > 12$ GeV, $|\eta| < 2.4$ using an integrated luminosity of 1.6 $\text{fb}^{-1}$. The analysis is extended to invariant masses as low as 12 GeV in the muon channel within a fiducal region of $p_\text{T}^\text{leading} > 9$ GeV, $p_\text{T}^\text{subleading} > 6$ GeV, $|\eta| < 2.4$ with 35 $\text{pb}^{-1}$.
Inspire | HepData | JHEP 1405 (2014) 068 | doi:10.1007/JHEP05(2014)068 | arXiv:1402.6263 [hep-ex]
This routine implements the measurement of $W$ boson production in association with a single charm quark with $4.6 \text{fb}^{-1}$ of $pp$ collision data at $\sqrt{s} = 7$ TeV collected with the ATLAS detector at the Large Hadron Collider. Results are quoted for the $W$ boson production decaying into either an electron or muon and the charm quark being identified as any charmed hadron above 5 GeV inside $\Delta R = 0.4$ of a jet with more than 25 GeV. Alternatively the presence of the charm quark is indicated by the presence of a $D$ or a $D^*$ meson with a $p_\text{T}$ above 8 GeV. The cross sections are quoted for the number of opposite sign minus same sign events, where the signs under consideration are the charge of the $W$ boson and the charmed hadrons tagging the event. Given are the integrated and differential cross sections as a function of the pseudorapidity of the lepton from the $W$-boson decay are measured. Additionally, the cross-section ratios $\sigma(W^+ + bar{c}) / \sigma(W^- + c)$ as well as the $p_\text{T}$ dependent cross sections of the $D$/$D^*$ mesons normalized to the $W$ inclusive cross sections are published. The measured data is unfolded to the Born level. One should therefore take care to run on samples without QED radiation off of the electrons. IMPORTANT NOTICE --- For the MC predictions in the paper, the branching fractions to $D$ and $D^*$ mesons have been adapted to be 0.2256 ($D$) and 0.2287 ($D^*$) (LEP/HERA combination). Some suggestion on how to do post-processing -- in case separate samples for $W^+ + c$ and $W^- + c$ and inclusive $W$ are used -- are included in the cc-file. This post-processing is needed to properly display the histograms for the cross section ratio plots $\sigma(W^+ + bar{c}) / \sigma(W^- + c)$ as well as for the cross section ratios of $W + D^{(*)}$ production over inclusive $W$ production ($\sigma(W^{+/-} D^{(*)}) / \sigma(W^{+/-})$) as a function of the $D^{(*)}$ meson transverse momentum.
Inspire | HepData | JHEP 1404 (2014) 031 | arXiv:1401.7610 [hep-ex]
Measurements differential distributions for inclusive $Z$-boson-plus-dijet production are performed in five fiducial regions, each with different sensitivity to the electroweak contribution. Measured distributions include the differential cross section as a function of the dijet invariant mass, the differential cross section and a function of the dijet rapidity separation, the differential cross section as a function of the number of jets in the rapidity interval bounded by the two leading jets. Other measurements include the jet veto effiency as a function of the dijet invariant mass and rapdity separation, the normalized transverse momentum balance cut efficiency, and the average number of jets falling into the rapidity interval boundd by the two leading jets, as a function of dijet invariant mass and dijet rapidity separation.
Inspire | HepData | Phys.Lett. B725 (2013) 223-242 | doi:10.1016/j.physletb.2013.07.049 | arXiv:1305.4192 [hep-ex]
This Letter reports a measurement of the high-mass Drell-Yan differential cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. Based on an integrated luminosity of 4.9 fb$^{-1}$, the differential cross-section in the $Z/\gamma^\ast \rightarrow e^+e^-$ channel is measured with the ATLAS detector as a function of the invariant mass, $m_{ee}$, in the range $116< m_{ee} <1500$ GeV, for a fiducial region in which both the electron and the positron have transverse momentum $p_\text{T}>25$ GeV and pseudorapidity $|\eta|<2.5$. A comparison is made to various event generators and to the predictions of perturbative QCD calculations at next-to-next-to-leading order.
Inspire | HepData | arXiv:1304.7098 [hep-ex] | J. High Energy Phys. 07 (2013) 032
Measurements of the production of jets of particles in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}$ = 7 TeV are presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. Inclusive and differential jet cross sections in $Z$ events, with Z decaying into electron or muon pairs, are measured for jets with transverse momentum $p_T > 30$ GeV and rapidity $|y| < 4.4$. This Rivet module implements the event selection for the weighted combination of both decay channels to produce the average cross section for a single lepton flavour, and uses the data from that combination (as in the paper plots). In the default mode this is how it will run, assuming mixed electronic and muonic events. If LMODE is set to EL (MU), the plots for the individual decay channels (with a slightly different fiducial phase space) are made.
Inspire | HepData | JHEP 1306 (2013) 084 | doi:10.1007/JHEP06(2013)084 | arXiv:1302.2929 [hep-ex]
Measurements of the W+b-jets ($W+b+X$ and $W+b\bar{b}+X$) production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. These results are based on data corresponding to an integrated luminosity of 4.6 $fb^{-1}$, collected with the ATLAS detector. Cross-sections are presented as a function of jet multiplicity and of the transverse momentum of the leading b-jet for both the combined muon and electron decay modes of the W boson. The default routine will consider the average of electron and muon decay channel of the W boson. Use LMODE=EL and LMODE=MU to specify the decay channel directly.
Inspire | HepData | arXiv:1302.1415 [hep-ex]
Cluster splitting scales are measured in events containing W bosons decaying to electrons or muons. The measurement comprises the four hardest splitting scales in a kT cluster sequence of the hadronic activity accompanying the W boson, and ratios of these splitting scales.
Inspire | HepData | Phys.Rev. D87 (2013) 112003 | doi:10.1103/PhysRevD.87.112003 | arXiv:1302.1283 [hep-ex]
Measurements of the differential fiducial cross sections for the production of a W or Z boson in association with a high-energy photon are measured using pp collisions at $\sqrt{s}=7 \text{TeV}$. The analysis uses a data sample with an integrated luminosity of 4.6/fb collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the W or Z bosons with the requirement of an associated isolated photon. The default routine will consider the electron decay channel of the Z boson. Use LMODE to specify the decay channel directly.
Inspire | HepData | New J.Phys. 15 (2013) 033038 | doi:10.1088/1367-2630/15/3/033038 | arXiv:1301.6872 [hep-ex]
The production of $W$ bosons in association with two jets in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 7$ TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36/pb, collected with the ATLAS detector at the LHC.
Inspire | HepData | arXiv:1210.2979 [hep-ex]
Measurement of the fiducial cross section for $W^+ W^-$ production in proton proton collisions at a centre-of mass energy of 7 TeV, is presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. The cross section is measured in the leptonic decay channels, using electron+MET and muon+MET $W$ decays. $W \to \tau$ processes with the tau decaying into electron + MET or muon + MET are also included in the measurement. The fiducial region contains dressed leptons in restricted $p_T$ and $\eta$ ranges. The selection has specific requirements for each production channel. A measurement of the normalized fiducial cross section as a function of the leading lepton transverse momentum is also presented.
Inspire | HepData | arXiv:1211.6899 [hep-ex]
A measurement of angular correlations in Drell-Yan lepton pairs via the $\phi^*$ observable is presented. This variable probes the same physics as the $Z/\gamma^*$ boson transverse momentum with a better experimental resolution. The $Z/\gamma^* \to ee$ and $Z/\gamma^* \to \mu \mu$ decays produced in proton--proton collisions at a centre-of-mass energy of $\sqrt{s} = 7\;\text{TeV}$ are used. Normalised differential cross sections as a function of $\phi^*$ are measured separately for electron and muon decay channels. The cross-section is also measured double differentially as a function of $\phi^*$ for three independent bins of the $Z$ boson rapidity.
Inspire | HepData | arXiv:1211.6096 [hep-ex]
Measurement of the fiducial cross section for $ZZ(*)$ production in proton proton collisions at a centre-of mass energy of 7 TeV, is presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. The cross-section is measured using processes with two $Z$ bosons decaying to electrons or muons or with one $Z$ boson decaying to electrons or muons and a second $Z$ boson decaying to neutrinos. The fiducial region contains dressed leptons in restricted $p_T$ and $\eta$ ranges. The selection has specific requirements for both production processes. A measurement of the normalized fiducial cross-section as a function of $ZZ$ invariant mass, leading $Z$ $p_T$ and angle of two leptons coming from the leading $Z$ is also presented for both signal processes.
Inspire | HepData | arXiv:1201.1276 [hep-ex]
Differential cross-sections of properties of the four leading jets in $W$+jets production, using the full 2010 dataset of 36 pb$^-1$. Observables include jet multiplicities, $pT$, $H_T$, angular distances, and others. All observables are available using jets with $pT>30$ and $pT>20$ GeV.
Inspire | HepData | Phys.Lett. B709 (2012) 341-357 | arXiv:1111.5570
This is a measurement of $WZ$ production in 1.02 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = $7 TeV collected by the ATLAS experiment in 2011. Doubly leptonic decay events are selected with electrons, muons and missing transverse momentum in the final state. The measurement of the combined fiducial cross section for the $WZ$ bosons decaying directly into electrons and muons is performed.
Inspire | HepData | arXiv:1111.2690v1 [hep-ex] | CERN-PH-EP-2011-162
Production of jets in association with a $Z/\gamma^*$ boson in proton--proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector. The analysis includes the full 2010 data set, collected with a low rate of multiple proton--proton collisions in the accelerator, corresponding to an integrated luminosity of 36 pb$^{-1}$. Inclusive jet cross sections in $Z/\gamma^*$ events, with $Z/\gamma^*$ decaying into electron or muon pairs, are measured for jets with transverse momentum $p_T > 30$ GeV and jet rapidity $|y| < 4.4$.
Inspire | HepData | Phys.Rev. D85 (2012) 072004 | doi:10.1103/PhysRevD.85.072004 | arXiv:1109.5141 [hep-ex]
The production cross sections of the inclusive Drell-Yan process $W^\pm \rightarrow \ell\nu$ ($\ell = e, \mu$) are measured in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector. The cross sections are evaluated differentially as a function of the $W$ boson rapidity based on an integrated luminosity of about 35 $\text{pb}^{-1}$ collected in 2010. The cross sections are measured separately for $W^+$ and $W^-$ production, and then used to construct the $W$ charge asymmetry as well.
Inspire | HepData | Phys.Rev. D85 (2012) 072004 | doi:10.1103/PhysRevD.85.072004 | arXiv:1109.5141 [hep-ex]
The production cross sections of the inclusive Drell-Yan process $Z/\gamma^\ast \rightarrow \ell\ell$ ($\ell = e, \mu$) are measured in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector. The cross sections are evaluated differentially as a function of the $Z$ boson rapidity based on an integrated luminosity of about 35 $\text{pb}^{-1}$ collected in 2010.
Inspire | HepData | arXiv:1108.6308v1 [hep-ex]
The W pT at $\sqrt{s} = 7$\;TeV is measured using $W\to e \, \nu_e$ and $W\to \mu \, \nu_\mu$ decay channels. The dressed leptons kinematics calculated from the sum of the post-FSR lepton momentum and the momenta of all photons radiated in a cone around the lepton, while the bare uses the lepton kinematics after all QED radiation.
Inspire | HepData | arXiv:1107.2381 [hep-ex]
The Z pT at $\sqrt{s} = 7$\;TeV is measured using electron and muon $Z$ decay channels. The dressed leptons definition uses photons clustered in a cone around the charged leptons, while the bare lepton definition uses the post-FSR charged leptons only in the $Z$ reconstruction. The data used in the bare leptons calculation are based on a forward application of a PHOTOS-based energy loss correction and are hence not quite model-independent.
Inspire | HepData | arXiv:1103.2929
Measurement of the muon charge asymmetry from W bosons produced in proton-proton collisions at a centre-of-mass energy of 7 TeV with ATLAS. The asymmetry is measured in the $W \to \mu$ decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb$^{-1}$.
Inspire | HepData | arXiv:1012.5382 [hep-ex]
Cross sections, in both the electron and muon decay modes of the W boson, are presented as a function of jet multiplicity and of the transverse momentum of the leading and next-to-leading jets in the event. Measurements are also presented of the ratio of cross sections for inclusive jet multiplicities. The results, based on an integrated luminosity of 1.3 pb-1, have been corrected for all known detector effects and are quoted in a limited and well-defined range of jet and lepton kinematics.
Inspire | HepData | CMS FSQ-16-008 | arXiv:1711.04299
Measurement of the underlying event activity, in proton-proton collisions at a centre-of-mass energy of $13 \mathrm{TeV}$, performed using inclusive Z-boson events collected by the CMS experiment at the Large Hadron Collider. The analyzed data corresponds to an integrated luminosity of $2.1 \mathrm{fb}^{-1}$. The underlying event activity is quantified in terms of charged particle multiplicity and their scalar sum of their transverse momentum in different topological regions defined with respect to the resultatnt azimuthal direction of the two muons coming from the decay of a Z-boson. The distributions are unfolded to stable charged-particle level and are compared with predictions from various simulations, as well as with the measurements at a centre-of-mass energy of $1.96 \mathrm{TeV}$ and $7 \mathrm{TeV}$ by the CDF and CMS experiments.
Inspire | HepData | DOI:10.1140/epjc/s10052-017-5140-y | arXiv:1611.06507 | CMS-SMP-14-010
Measurements of the associated production of a Z boson with at least one jet originating from a b quark in proton-proton collisions at $\sqrt{s} = 8$ TeV are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8 $\text{fb}^{-1}$. Z bosons are reconstructed through their decays to electrons and muons. Cross sections are measured as a function of observables characterizing the kinematics of the b jet and the Z boson. Ratios of differential cross sections for the associated production with at least one b jet to the associated production with any jet are also presented. The production of a Z boson with at least two b jets is investigated, and differential cross sections are measured for the dijet system. Results are compared to theoretical predictions, testing two different flavour schemes for the choice of initial-state partons. Note of the authors: the Z boson selection and b-tagging algorithms used in the code are based on standard Rivet code and do not exactly coincide with those used in the paper. They anyway reproduce the paper results at the percent level or better for most of the bins.
Inspire | HepData | Eur.Phys.J. C77 (2017) no.4, 236 | DOI:10.1140/epjc/s10052-017-4730-z | CMS-SMP-14-014 | CERN-EP-2016-205 | arXiv:1609.05721
Fully leptonic $WZ$ diboson production at the CMS experiment, measured inclusively at 7 and 8 TeV, and differentially at 8 TeV only (this analysis). The differential cross-sections are measured with respect to $Z$ $p_T$, leading jet $p_T$, and the jet multiplicity. This data is useful for constraining MC models of QCD and EW activity in diboson events, and for constraining anomalous couplings. NOTE: total cross-section is fixed to the measured value in this analysis, since the correction factors from fiducial to inclusive $WZ$ production were not published.
Inspire | HepData | arXiv:1502.07940 [hep-ex]
The differential cross sections for the production of photons in Z to mu+ mu- gamma decays are presented as a function of the transverse energy of the photon and its separation from the nearest muon. The data for these measurements were collected with the CMS detector and correspond to an integrated luminosity of 4.7 inverse femtobarns of pp collisions at sqrt(s) = 7 TeV delivered by the CERN LHC.
Inspire | HepData | Phys.Rev. D91 (2015) 052008 | http://dx.doi.org/10.1103/PhysRevD.91.052008 | http://arxiv.org/abs/arXiv:1408.3104 | http://inspirehep.net/record/1310737
Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at $\sqrt{s}=7$ TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9 $\text{fb}^{-1}$. The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD. Cuts: First two leading electrons or muons with $p_T > 20$ GeV and $|\eta| < 2.4$ Dilepton invariant mass in the [71,111] GeV range Jets $p_T > 30$ GeV and $|\eta| < 2.4$ $\Delta{R}($lepton,jet$) > 0.5$
Inspire | HepData | Phys. Lett. B741 (2014) 12-37 | https://inspirehep.net/record/1303894 | http://arxiv.org/abs/1406.7533
A study of jet production in association with $W$ bosons has been performed, in events with the $W$ decaying to a muon. Jets are required to have $pT > 30$ GeV and $|eta| < 2.4$. Muons are required to have $pT > 25$ and $|eta| < 2.1$. Jets are only considered if they are separated from the muon by $\Delta{R} > 0.5$. Muons are dressed with photons in a cone of $0.1$ around the muon.
Inspire | HepData | CMS-FSQ-12-028 | CERN-PH-EP-2013-224 | arXiv:1312.5729 | Submitted to JHEP
Double parton scattering is investigated in proton-proton collisions at $\sqrt{s} = 7$ TeV where the final state includes a $W$ boson, which decays into a muon and a neutrino, and two jets. The data sample corresponds to an integrated luminosity of 5 inverse femtobarns, collected with the CMS detector at the LHC.
Inspire | HepData | arXiv:1310.3082 | https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsSMP12004 | Submitted to Phys. Rev. Lett
Rapidity distributions are presented for events containing either a $Z$ boson or a photon in association with a single jet in proton-proton collisions produced at the CERN LHC. The data, collected with the CMS detector at $\sqrt{s} = 7$ TeV, correspond to an integrated luminosity of 5.0/fb. The individual rapidity distributions of the boson and the jet are consistent within 5\% with expectations from perturbative QCD. However, QCD predictions for the sum and the difference in rapidities of the two final-state objects show significant discrepancies with CMS data. In particular, next-to-leading-order QCD calculations, and two Monte Carlo event generators using different methods to merge matrix-element partons with evolved parton showers, appear inconsistent with the data as well as with each other.
Inspire | HepData | 10.1007 / JHEP12(2013)039 | arXiv:1310.1349 | CERN-PH-EP-2013-153 | CMS-EWK-11-015
A study of proton-proton collisions in which two $b$-hadrons are produced in association with a $Z$ boson is reported. The collisions were recorded at a centre-of-mass energy of 7 TeV with the CMS detector at the LHC, for an integrated luminosity of 5.2/fb. The $b$-hadrons are identified by means of displaced secondary vertices, without the use of reconstructed jets, permitting the study of $b$-hadron pair production at small angular separation. Differential cross sections are presented as a function of the angular separation of the $b$-hadrons and the $Z$ boson. In addition, inclusive measurements are presented. For both the inclusive and differential studies,different ranges of $Z$ boson momentum are considered.
Inspire | HepData | arXiv:1303.4811
Measurements of the mass spectra of the jets in dijet and $W/Z$+jet events from proton--proton collisions at a centre-of-mass energy of 7 TeV using a data sample of integrated luminosity of 5 fb$^-1$. The jets are reconstructed using the both the anti-$k_T$ algorithm with $R=0.7$ (AK7) and the Cambridge-Aachen algorithm with $R=0.8$ (CA8) and $R=1.2$ (CA12) with several grooming techniques applied (ungroomed, filtered, pruned and trimmed). See the text of the paper for more details. For the dijet events the distributions are presented as a function of the mean Mass of the two leading jets in bins of the mean p_\perp of the two jets.
Inspire | HepData | arXiv:1303.4811
Measurements of the mass spectra of the jets in dijet and $W/Z$+jet events from proton--proton collisions at a centre-of-mass energy of 7 TeV using a data sample of integrated luminosity of 5 fb$^-1$. The jets are reconstructed using the both the anti-$k_T$ algorithm with $R=0.7$ (AK7) and the Cambridge-Aachen algorithm with $R=0.8$ (CA8) and $R=1.2$ (CA12) with several grooming techniques applied (ungroomed, filtered, pruned and trimmed). See the text of the paper for more details. For the dijet events the distributions are presented as a function of the mean Mass of the two leading jets in bins of the mean p_\perp of the two jets.
Inspire | HepData | http://cms.cern.ch/iCMS/analysisadmin/cadi?ancode=EWK-11-021 | https://cds.cern.ch/record/1503578 | http://inspirehep.net/record/1209721 | arXiv:1301.1646 [hep-ex] (http://arxiv.org/abs/arXiv:1301.1646) | Submitted to Phys. Lett. B
Measurements are presented of event shapes and azimuthal correlations in the inclusive production of a Z boson in association with jets in proton-proton collisions. The data correspond to an integrated luminosity of 5.0/fb, collected with the CMS detector at the CERN LHC at $\sqrt{s} = 7$\;TeV. This to test perturbative QCD predictions and evaluate a substantial background to most physics channels. Studies performed as a function of jet multiplicity for inclusive $Z$ boson production and for $Z$ bosons with transverse-momenta greater than 150\;GeV, are compared to predictions from Monte Carlo event generators that include leading-order multiparton matrix-element (with up to four hard partons in the final state) and next-to-leading-order simulations of Z + 1-jet events. The results are corrected for detector effects, and can therefore be used as input to improve models for describing these processes.
Inspire | HepData | Phys. Lett. B 718 (2013) 752 | doi:10.1016/j.physletb.2012.10.082 | http://arxiv.org/abs/1207.3973
This analysis measures the forward-backward asymmetry $A_{FB}$ in Drell-Yan events at a center-of-mass energy of 7 TeV. Both the individual and combined electron and muon pair channels are analyzed. In four rapidity regions, $A_{FB}$ is given as a function of the lepton mass. The data, recorded with the CMS detector, corresponds to an integrated luminosity of $5\,\textrm{fb}^{-1}$.
Inspire | HepData | arXiv:hep-ex/1406.0113
A measurement of the inclusive $ZZ$ production cross section and constraints on anomalous triple gauge couplings in proton-proton collisions at $\sqrt{s} = 8 TeV$ are presented. The analysis is based on a data sample, corresponding to an integrated luminosity of 19.6/fb, collected with the CMS experiment at the LHC. The measurements are performed in the leptonic decay modes $ZZ \to lll^\prime l^\prime$, where $l = e,\mu$ and $l^\prime = e, \mu, \tau$. The measured total cross section $ \sigma (pp \to ZZ) = 7.7 \pm 0.5 (\mathrm{stat}) + 0.5 -0.4 (\mathrm{syst}) \pm 0.4 (\mathrm{theo}) \pm 0.2 (\mathrm{lumi}) pb$, for both $Z$ bosons produced in the mass range $60 < m_Z < 120 \text{GeV}$, is consistent with standard model predictions. Differential cross sections, in phase space $p_T(\mu) > 5 \text{GeV}$, $p_T(e) > 7 \text{GeV}$, $|\eta(\mu)|<2.4$ , $|\eta(e)|<2.5$ and the 60--120 \text{GeV} mass requirement, are measured and well described by the theoretical predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous $ZZZ$ and $ZZ\gamma$ couplings at the 95\% confidence level, $-0.004 < f4Z < 0.004$, $-0.004 < f5Z < 0.004$, $-0.005 < f4\gamma < 0.005$, and $-0.005 < f5\gamma < 0.005.$
Inspire | HepData | CMS-QCD-11-012 | CERN-PH-EP-2012-085 | arXiv:1204.1411 [hep-ex]
A measurement of the underlying event activity using Drell-Yan events using muonic final state. The production of charged particles with pseudorapidity $|\eta| < 2$ and transverse momentum $p_\perp > 0.5\,\text{GeV}/c$ is studied in towards, transverse and away region w.r.t. to the direction of di-muon system. The UE activity is measured in terms of of a particle density and an energy density. The particle density is computed as the average number of primary charged particles per unit pseudorapidity and per unit azimuth. The energy density is expressed in terms of the average of the scalar sum of the transverse momenta of primary charged particles per unit pseudorapidity and azimuth. The ratio of the energy and particle density is also reported in 3 regions. UE activity is studied as a function of invariant mass of muon pair ($M_{\mu\mu}$) by limiting the ISR contribution by requiring transverse momentum of muon pair $p_\perp(\mu\mu) < 5\,\text{GeV}/c$. The $p_\perp(\mu\mu)$ dependence is studied for the events having $M_{\mu\mu}$ in window of 81--101 GeV/$c$. The normalized charged particle multiplicity and $p_\perp$ spectrum of the charged particles in three regions also been reported for events having $M_{\mu\mu}$ in window of 81--101 GeV/$c$. Multiplicity and $p_\perp$ spectra in the transverse region are also reported, for events having $p_\perp(\mu\mu) < 5\,\text{GeV}/c$.
Inspire | HepData | Phys.Rev. D85 (2012) 032002 | arXiv:1110.4973 | CMS-EWK-10-010 | CERN-PH-EP-2011-169
Cross section as a function of $p_T$ and y of the Z boson decaying into muons in p p collisions at $\sqrt{s}$ = 7 TeV. $p_T$ and y cross sections are measured for $60 < m_{\mu\mu} < 120$ GeV. The $p_T$ cross section is measured for lepton $p_T > 20$ GeV and $\eta < 2.1$, while the y cross section is extrapolated to all lepton $p_T$ and $\eta$. This measurement was performed using 36 pb$^{-1}$ of data collected during 2010 with the CMS detector at the LHC.
Inspire | HepData | J. High Energy Phys.1401:033,2014 | doi:10.1007/jhep01(2014)033 | arXiv:hep-ex/1310.8197
A study of forward $Z +$ jet production in $pp$ collisions at $\sqrt{s}=7$ TeV is presented. Results are shown for two jet thresholds of $p_T>10$ GeV and $p_T>20$ GeV. Total cross-sections and six differential cross-sections are measured.
Inspire | HepData | J. High Energy Phys. 02 (2013) 106 | doi:10.1007/JHEP02(2013)106 | arXiv:1212.4620 [hep-ex]
Measurement of the $pp \to \mathrm{Z}^0$ cross-section in the $\mathrm{Z}/\gamma \to e^{+}e^{-}$ mode at $\sqrt{s} = 7$ TeV. Daughter electrons are required to have $p_T > 20$ GeV/$c$, $2 < \eta < 4.5$ and the dielectron invariant mass in range 60-120 GeV/$c^2$. The cross-section is given as a function of $Z$ rapidity and an angular variable ($\phi^*$) closely related to $Z$ transverse momentum (derived from the lepton pseudorapidity and azimuthal angle differences). For event generators implementing cross-section QCD corrections only at LO the distributions are normalized to the cross-section measured in data $76.0 \pm 0.8 \pm 2.0 \pm 2.6 \pm 0.4$ pb, where the first uncertainty is statistical, the second is systematic, the third is due to luminosity uncertainty and the fourth to FSR corrections.
Monte Carlo validation observables for $W[e \, \nu]$ + jets production
Observables sensitive to the polarisation of the W boson: A0, ... A7, fR, fL, f0, separately for W+ and W-.
In addition to the typical jet observables this analysis contains observables related to properties of the WW-pair momentum, correlations between the WW, properties of the W bosons, properties of the leptons, correlations between the opposite charge leptons and correlations with jets.
Monte Carlo validation observables for $Z[e^+ \, e^-]$ production
Available observables are the pT of jets 1-4, jet multiplicity, $\Delta\eta(Z, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates.
In addition to the typical jet observables this analysis contains observables related to properties of the ZZ-pair momentum, correlations between the ZZ, properties of the Z bosons, properties of the leptons, correlations between the opposite charge leptons and correlations with jets.
Generated at Thursday, 12. December 2019 01:59PM