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Herwig  7.2.1
Interfaces defined for the Herwig::Merger class.
Brief class description:
The Merger class takes care of merging multiple LO & NLO cross sections.
See also Herwig::Merger

Name: RealSubtractionRatio
Type: Parameter

Description:
If the pt of the Dipole divided by the merging scale is lower than the ratio, the dipole is used to subtract the real emission. Otherwise the shower approximation is used,
Default value: 0
Minimum value: 1
Maximum value: 10

Name: chooseHistory
Type: Integer parameter

Description:
Various ways of choosing the history weights: 0(default):dipole xs, 1:dipole/born, 2:flat, 3: 1/pt_dip
Default value: 3
Minimum value: -1

Name: MergingScaleSmearing
Type: Parameter

Description:
Set the percentage the merging pt should be smeared.
Default value: 0
Minimum value: 0
Maximum value: 0.5

Name: IRSafePT
Type: Parameter

Description:
Set the pt for which a matrixelement should be treated as IR-safe.
Default value: 0
Minimum value: 0
Maximum value: 1e+06

Name: emitDipoleMEDiff
Type: Switch

Description:
Allow emissions of the unitarisation contribution with prob. 1-min(B_n/sum Dip_n,sum Dip_n/B_n)
Registered options:
0(No)
1(Yes)
Default value: 0

Name: gamma
Type: Parameter

Description:
gamma parameter.
Default value: 1
Minimum value: 0

Name: MergingScale
Type: Parameter

Description:
The MergingScale.
Default value: 20
Minimum value: 0

Name: CMWScheme
Type: Switch

Description:
Use CMW-Scheme to calculate the alpha_s for the shower expressions.
Registered options:
0(No)
No CMW-Scheme
1(Linear)
Linear CMW multiplication: alpha_s(q) -> alpha_s(q)(1+K_g*alpha_s(q)/2pi )
2(Factor)
Use factor in alpha_s argument: alpha_s(q) -> alpha_s(fac*q) with fac=exp(-(67-3pi^2-10/3*Nf)/(33-2Nf))
Default value: 0

Name: ShowerExpansionWeights
Type: Switch

Description:
Calculate the expansions of the shower history to be NLO accurate, in different schemes.
Registered options:
0(NoWeights)
Switch off the expansion.
1(FlatAndHistoryReweighted)
Sum alphaS expansion and weight with same Historyweight as LO.
2(NoAlphaSReweightForSudakovExpansion)
Switch off the expansion.
3(NoAlphaSReweightForAllExpansions)
Switch off the expansion.
4(NoAlphaSReweightForAlphaSExpansion)
Switch off the expansion.
Default value: 3

There may be interfaces inherited from the Herwig::MergerBase class.