Interfaces defined for the Pythia7::SpaceShowerHandler class.

Brief class description:
Administers the space-like shower.
See also Pythia7::SpaceShowerHandler
Name: Q2StartFrac
Type: Parameter
Description:
Mimimum gap in $Q^2$ values to allow iteration when parton density vanishes.
Default value: 0.9
Minimum value: 0
Maximum value: 1
Name: HeavyMax
Type: Parameter
Description:
Maximum allowed x when reconstructing back to heavy flavour from gluon or photon.
Default value: 0.5
Minimum value: 0
Maximum value: 1
Name: ExtraPreweight
Type: Parameter
Description:
Extra preweight in QED shower evolution, to avoid maximum violation.
Default value: 0.1
Minimum value: 0
Maximum value: 1
Name: HeavyEvol
Type: Parameter
Description:
Safety margin in x that heavy flavour evolution is at all possible.
Default value: 0.8
Minimum value: 0
Maximum value: 1
Name: TinyKinPrec
Type: Parameter
Description:
Vanishingly small recoil mass in branching kinematics reconstruction.
Default value: 1e-10
Minimum value: 0
Maximum value: 1
Name: TinyKernelPDF
Type: Parameter
Description:
Vanishingly small product of splitting kernels and parton density ratios.
Default value: 1e-05
Minimum value: 0
Maximum value: 1
Name: TinyPDF
Type: Parameter
Description:
Vanishingly small parton density.
Default value: 1e-10
Minimum value: 0
Maximum value: 1
Name: TinyQChg
Type: Parameter
Description:
Smallest particle mass for QED evolution (= electron mass).
Default value: 0.00051
Minimum value: 0
Maximum value: 1
Name: XMinEmittedChg
Type: Parameter
Description:
Minimum x fraction of emitted photon - matched to treatment of photon PDF.
Default value: 1e-10
Minimum value: 0
Maximum value: 1
Name: ZMinEmitted
Type: Parameter
Description:
Minimum fraction 1 - z of emitted QCD parton, in addition to other limits.
Default value: 0.001
Minimum value: 0
Maximum value: 1
Name: EMinEmitted
Type: Parameter
Description:
Minimum energy of emitted QCD parton in rest frame of subprocess.
Default value: 2
Minimum value: 0
Maximum value: 1e+10
Name: AlphaEMFix
Type: Parameter
Description:
Fixed $\alpha_{\mbox{EM}}$ value.
Default value: 0.0073
Minimum value: 0
Maximum value: 10
Name: Lambda5
Type: Parameter
Description:
$\Lambda_{\mbox{QCD}}$ (five flavours) in alpha_strong for AlphaSMode >= 1.
Default value: 0.18
Minimum value: 0
Maximum value: 10
Name: AlphaSFix
Type: Parameter
Description:
Fixed alpha_strong 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: 1e+10
Name: Q0ChgQ
Type: Parameter
Description:
Parton shower cut-off mass for photon coupling to coloured particle.
Default value: 1
Minimum value: 0
Maximum value: 1e+10
Name: Q0
Type: Parameter
Description:
Parton shower cut-off mass for QCD emissions.
Default value: 1
Minimum value: 0
Maximum value: 1e+10
Name: RespectScale
Type: Switch
Description:
Use the scale variable of original partons to restrict branchings.
Registered options:
0(No)
Don't restrict.
1(Q2)
Restrict $Q^2 <$ scale of original parton.
2(PT2)
Restrict $p_\perp^2 <$ scale of original parton.
3(ETheta2)
Restrict $(E*\theta)^2 <$ scale of original parton.
4(Theta2)
Restrict $\theta^2 <$ scale of original parton.
Default value: 0
Name: PhiCoherAsym
Type: Switch
Description:
Azimuthal asymmetry induced by colour coherence.
Registered options:
0(No)
Don't use Azimuthal asymmetry.
1(Yes)
Use Azimuthal asymmetry.
Default value: 1
Name: PhiPolAsym
Type: Switch
Description:
Azimuthal asymmetry induced by gluon polarization.
Registered options:
0(No)
Don't use Azimuthal asymmetry.
1(Yes)
Use Azimuthal asymmetry.
Default value: 1
Name: AngularOrdering
Type: Switch
Description:
Determines whether the space-like shower should use angular ordering or not.
Registered options:
0(No)
Don't use angular ordering.
1(Yes)
Use angular ordering.
Default value: 1
Name: Q2Order
Type: Switch
Description:
Usage of strict Q2 ordering.
Registered options:
0(Yes)
Use $Q^2$ ordering
1(No)
No $Q^2$ ordering, use maximum kinematically allowed $Q^2$ in each branching (toy scenario to be developed).
Default value: 0
Name: FinalCone
Type: Switch
Description:
Restrict first emission within cone given by colour flow in hard process.
Registered options:
0(No)
No restriction.
1(Yes)
Use cone with isotropic phi-angle inside.
2(Anisotropic)
Use cone with anisotropic phi-angle inside.
Default value: 2
Name: SoftGluonResum
Type: Switch
Description:
Resum the effect of multiple soft gluon emissions.
Registered options:
0(No)
Don't use resummation.
1(Yes)
Use resummation.
Default value: 1
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: MaxVirtuality
Type: Switch
Description:
Maximum virtuality setting the starting point of the evolution.
Registered options:
0(S)
Total invariant mass squared.
1(SHat)
Invariant mass squared of hard sub-process.
2(MT2)
Average $m_\perp^2$ of hard sub-process.
3(MinMT2)
Smallest $m_\perp^2$ in hard sub-process.
Default value: 0
Name: AlphaSMode
Type: Switch
Description:
Running of alpha_S in evolution.
Registered options:
0(Fixed)
Use fixed $\alpha_S$.
1(Q2)
Running $\alpha_S$ with scale $Q^2$.
2(PT2)
Running $\alpha_S$ with scale $p_\perp^2$.
Default value: 2
Name: NQuarks
Type: Integer parameter
Description:
Number of allowed quark flavours in $g\rightarrow q\bar{q}$ branching.
Default value: 5
Minimum value: 0
Maximum value: 8
Name: LeptonShower
Type: Switch
Description:
Which kind of ISR shower is allowed for incoming leptons.
Registered options:
0(None)
No ISR allowed.
1(Photon)
Only photon emission.
2(SpacePhoton)
Photon emission and space-like photon branchings (if supported by the PDF).
Default value: 1
Name: HadronShower
Type: Switch
Description:
Which kind of ISR shower is allowed for incoming hadrons.
Registered options:
0(None)
No ISR allowed.
1(QCD)
Only QCD emissions.
2(Photon)
QCD and photon emissions.
3(SpacePhoton)
QCD, photon emissions and space-like photon branchings (if supported by the PDF).
Default value: 2
Generated on Thu Apr 29 12:45:33 2010 for Pythia7 by  doxygen 1.5.5