- Brief class description:
- Administers the time-like shower.
See also Pythia7::TimeShowerHandler
Name: Q0FracPS
Type: Parameter
- Description:
- Fraction of Q0 cut-off mass used as safety margin in daughter mass sum. Relevant for total parton multiplicity.
Default value: 0.25
Minimum value: 0
Maximum value: 1
Name: AlphaEMFix
Type: Parameter
- Description:
- Fixed value.
Default value: 0.0073
Minimum value: 0
Maximum value: 10
Name: Lambda5
Type: Parameter
- Description:
- (five flavours) in alpha_strong for AlphaSMode >= 1.
Default value: 0.25
Minimum value: 0
Maximum value: 10
Name: AlphaSFix
Type: Parameter
- Description:
- Fixed value for AlphaSMode == 0.
Default value: 0.2
Minimum value: 0
Maximum value: 10
Name: Q0ChgL
Type: Parameter
- Description:
- Parton shower cut-off mass for pure QED branchings. Assumed <= Q0ChgQ.
Default value: 0.001 (May be changed by member function.)
Minimum value: 0
Maximum value: 1000
Name: Q0ChgQ
Type: Parameter
- Description:
- Parton shower cut-off mass for photon coupling to coloured particle.
Default value: 1
Minimum value: 0
Maximum value: 1000
Name: Q0
Type: Parameter
- Description:
- Parton shower cut-off mass for QCD emissions.
Default value: 1
Minimum value: 0
Maximum value: 1000
Name: RespectScale
Type: Switch
- Description:
- Use the scale variable of original partons to restrict branchings.
Registered options:
- 0(
No
)
- No restriction.
- 1(
Q2
)
- Restrict with scale.
- 2(
PT2
)
- Restrict with scale.
- 3(
ETheta2
)
- Restrict with scale.
- 4(
Theta2
)
- Restrict with scale.
Default value: 0
Name: PhiCoherAsym
Type: Switch
- Description:
- Azimuthal asymmetry induced by colour coherence.
Registered options:
- 0(
No
)
- No asymmetry.
- 1(
Yes
)
- Asymmetry
Default value: 1
Name: PhiPolAsym
Type: Switch
- Description:
- Azimuthal asymmetry induced by gluon polarization.
Registered options:
- 0(
No
)
- No asymmetry.
- 1(
Yes
)
- Asymmetry
Default value: 1
Name: InitialCone
Type: Switch
- Description:
- Restrict first emission within cone given by colour flow in hard process.
Registered options:
- 0(
No
)
- Don't restric emissions.
- 1(
Yes
)
- Restrict emissions with isotropic phi angle inside cone.
- 2(
Asym
)
- Restrict emissions with anisotropic phi angle inside cone.
Default value: 2
Name: QEDShower
Type: Switch
- Description:
- Allow a QED shower together with QCD ones.
Registered options:
- 0(
No
)
- Don't use QED showers
- 1(
Yes
)
- Allow on-shell photon emissions.
- 2(
Photon
)
- Allow both photon emissions and photon branchings.
Default value: 2
Name: MEMode
Type: Switch
- Description:
- Use of matrix element corrections.
Registered options:
- 0(
No
)
- Don't use matrix element corrections.
- 1(
Yes
)
- Use matrix element corrections.
Default value: 1
Name: AlphaSMode
Type: Switch
- Description:
- Running of in evolution.
Registered options:
- 0(
Fix
)
- Use fixed
- 1(
Q2
)
- Running with scale .
- 2(
PT2
)
- Running with scale .
- 3(
Mixed
)
- Running with scale except for where is used.
Default value: 2
Name: NQuark
Type: Integer parameter
- Description:
- Number of allowed quark flavours in branching.
Default value: 5
Minimum value: 0
Maximum value: 10
Name: AngularOrdering
Type: Switch
- Description:
- Angular ordering in shower
Registered options:
- 0(
Off
)
- Don't use angular ordering
- 1(
Gluon
)
- Use angular ordering for gluon emissions.
- 2(
AllQCD
)
- Use angular ordering for all QCD splittings.
Default value: 2
Generated on Thu Apr 29 12:45:33 2010 for Pythia7 by
1.5.5