Inspire | HepData | Analysis reference | ATLAS-HIGG-2015-04 | JHEP 1608 (2016) 104 | doi:10.1007/JHEP08(2016)104 | arXiv:1604.02997
This paper describes a measurement of fiducial and differential cross sections of gluon-fusion Higgs boson production in the $H\rightarrow W W^\ast \rightarrow e\nu\mu\nu$ channel, using 20.3 fb$^{-1}$ of proton-proton collision data. The data were produced at a centre-of-mass energy of $\sqrt{s} = 8$ TeV at the CERN Large Hadron Collider and recorded by the ATLAS detector in 2012. Cross sections are measured from the observed $H\rightarrow W W^\ast \rightarrow e\nu\mu\nu$ signal yield in categories distinguished by the number of associated jets. The total cross section is measured in a fiducial region defined by the kinematic properties of the charged leptons and neutrinos. Differential cross sections are reported as a function of the number of jets, the Higgs boson transverse momentum, the dilepton rapidity, and the transverse momentum of the leading jet. The jet-veto efficiency, or fraction of events with no jets above a given transverse momentum threshold, is also reported. All measurements are compared to QCD predictions from Monte Carlo generators and fixed-order calculations, and are in agreement with the Standard Model predictions.
Inspire | HepData | Analysis reference | ATLAS-HIGG-2014-11 | arXiv:1504.05833
WARNING --- this analysis requires stable higgs bosons --- Measurements of the total and differential cross sections of Higgs boson production are performed using 20.3 $\text{fb}^{-1}$ of pp collisions produced by the Large Hadron Collider at a center-of-mass energy of 8 TeV and recorded by the ATLAS detector. Cross sections are obtained from measured Higgs to diphoton and ZZ* event yields, which are combined accounting for detector efficiencies, fiducial acceptances and branching fractions. Differential cross sections are reported as a function of Higgs boson transverse momentum, Higgs boson rapidity, number of jets in the event, and transverse momentum of the leading jet. The total production cross section is determined to be $33.0 \pm 5.3 (\text{stat}) \pm 1.6 (\text{sys})$ pb.
Inspire | HepData | Analysis reference | ATLAS-HIGG-2013-10 | arXiv:1407.4222 | JHEP 09 (2014) 112
Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of 8TeV. The analysis is performed in the Higgs diphoton decay channel using 20.3/fb of data recorded by the ATLAS experiment at the CERN Large Hadron Collider. The signal yields are corrected for the effects of detector inefficiency and resolution. Differential cross sections are also presented, as a function of variables related to the diphoton kinematics and the jet activity produced in the Higgs boson events. The observed spectra are statistically limited but broadly in line with the theoretical expectations. Note on reinterpretation: Since the background is subtracted from a fit, any BSM signal would presumably also have beed subtracted. Therefore should not be used to constrain BSM signals unless they comes from a genuine excess of SM Higgs->gammagamma.
Inspire | HepData | Analysis reference | JHEP 1703 (2017) 032, 2017 | DOI:10.1007/JHEP03(2017)032 | arXiv:1606.01522 | CMS-HIG-15-010
The cross section for Higgs boson production in pp collisions is studied using the $H\rightarrow W^+ W^-$ decay mode, followed by leptonic decays of the W bosons to an oppositely charged electron-muon pair in the final state. The measurements are performed using data collected by the CMS experiment at the LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of $19.4\,\text{fb}^{-1}$. The Higgs boson transverse momentum ($p_\text{T}$) is reconstructed using the lepton pair $p_\text{T}$ and missing $p_\text{T}$. The differential cross section times branching fraction is measured as a function of the Higgs boson $p_\text{T}$ in a fiducial phase space defined to match the experimental acceptance in terms of the lepton kinematics and event topology. The production cross section times branching fraction in the fiducial phase space is measured to be $39 \pm 8\,\text{(stat)} \pm 9\,\text{(syst)}\,\text{fb}$. The measurements are found to agree, within experimental uncertainties, with theoretical calculations based on the standard model. The fiducial region is defined at particle level (using Born level leptons) as: - emununu, leptons are required not to originate from leptonic tau decays - leading lepton $p_T > 20$ GeV - subleading lepton $p_T > 10$ GeV - psudorapidity of electrons and muons $|\eta| < 2.5$ - Invariant mass of the two charged leptons $m_{ll} > 12$ GeV - Charged lepton pair $p_T > 30$ GeV - Invariant mass of the leptonic system in the transverse plane $m_T^{e\mu\nu\nu} > 50$ GeV Notes on reinterpretation: Major- Despite the existance of a "fiducial" cross section definition, it is not clear this can really be used to constrain any BSM signal other than an excess/deficit in SM Higgs->WW events. There is a b-jet veto is applied to suppress ttbar background, which is however not implemented in the fiducial cross section defintion, and so is extrapolated out during the unfolding. Even after this, the background remains very large and is subtracted using a fit to data. How all this might affect a hypothetical non-SM-H source of electrons and muons (on which the "fiducial" region is based) is very difficult to evaluate. Minor- The rivet routine uses dressed leptons even though the above (and the paper) say they are born level.