- Brief class description:
- The ThePEG::StandardModelBase class provides the base class for all models and an implementation of the couplings and parameters of the Standard Model.
See also ThePEG::StandardModelBase
Name: QCD/RunningAlphaS
Type: Reference to objects of class ThePEG::AlphaSBase
- Description:
- Reference to an object capable of calculating the running stron coupling at a given scale
Name: QCD/AlphaS
Type: Parameter
- Description:
- The (fixed) strong coupling constant.
Default value: 0.2
Minimum value: 0
Maximum value: 100
Name: QCD/Nc
Type: Integer parameter
- Description:
- The number of colours assumed in the Standard model.
Default value: 3
Minimum value: 0
Maximum value: 10
Name: EW/BosonWidth
Type: Switch
- Description:
- Option for the calculation of the W and Z boson widths
Registered options:
- 0(
Experiment
)
- Use the values from the ParticleData objects
- 1(
LeadingOrder
)
- Calculate them using leading-order formulae
- 2(
HigherOrder
)
- Calculate them including higher order QCD corrections
Default value: 0
Name: EW/Scheme
Type: Switch
- Description:
- Option for the definition of the electroweak parameters
Registered options:
- 0(
Default
)
- Use the best values for all the electroweak parameters, which can be inconsistent.
- 1(
GMuScheme
)
- Use the G_mu scheme, input parameters mW,mZ and GF
- 2(
alphaMZScheme
)
- Use the alpha_MZ scheme, input parameters mW, mZ and alpha(mZ)
- 3(
NoMass
)
- Input parameters alpha(mZ),GF,sin2thetaW
- 4(
mW
)
- Input parameters mW, GF and sin2thetaW
- 5(
mZ
)
- Input parameters mZ, alphaEM and sin2thetaW
Default value: 0
Name: EW/CKM
Type: Reference to objects of class ThePEG::CKMBase
- Description:
- Reference to an object capable of calculating the square of the elements of the Cabibbo-Kobayashi-Maskawa flavour mixing matrix
Name: EW/RecalculateEW
Type: Switch
- Description:
- Recalculate all parameters which depend directly on
in the initialization disregarding the values previously set. This affects only EW/v_nu
, EW/v_e
, EW/v_u
, EW/v_d
, EW/a_nu
, EW/a_e
, EW/a_u
and EW/a_d
.
Registered options:
- 0(
Off
)
- Off
- 1(
On
)
- On
Default value: 1
Name: EW/a_d
Type: Unlimited Parameter
- Description:
- The axial coupling between a down-type quark and a Z^0. See also command interface
EW/RecalculateEW
Default value: -1
Name: EW/a_u
Type: Unlimited Parameter
- Description:
- The axial coupling between an up-type quark and a Z^0. See also command interface
EW/RecalculateEW
Default value: 1
Name: EW/a_e
Type: Unlimited Parameter
- Description:
- The axial coupling between a charged lepton and a Z^0. See also command interface
EW/RecalculateEW
Default value: -1
Name: EW/a_nu
Type: Unlimited Parameter
- Description:
- The axial coupling between a neutrino and a Z^0. See also command interface
EW/RecalculateEW
Default value: 1
Name: EW/v_d
Type: Unlimited Parameter
- Description:
- The vector coupling between a down-type quark and a Z^0. See also command interface
EW/RecalculateEW
Default value: -0.690667
Name: EW/v_u
Type: Unlimited Parameter
- Description:
- The vector coupling between an up-type quark and a Z^0. See also command interface
EW/RecalculateEW
Default value: 0.381333
Name: EW/v_e
Type: Unlimited Parameter
- Description:
- The vector coupling between a charged lepton and a Z^0. See also command interface
EW/RecalculateEW
Default value: -0.072
Name: EW/v_nu
Type: Unlimited Parameter
- Description:
- The vector coupling between a neutrino and a Z^0. See also command interface
EW/RecalculateEW
Default value: 1
Name: EW/e_d
Type: Unlimited Parameter
- Description:
- The coupling between a down-type quark and a photon.
Default value: -0.333333
Name: EW/e_u
Type: Unlimited Parameter
- Description:
- The coupling between an up-type quark and a photon.
Default value: 0.666667
Name: EW/e_e
Type: Unlimited Parameter
- Description:
- The coupling between a charged lepton and a photon.
Default value: -1
Name: EW/e_nu
Type: Unlimited Parameter
- Description:
- The coupling between a neutrino and a photon.
Default value: 0
Name: EW/FermiConstant
Type: Parameter
- Description:
- The Fermi constants G_F
Default value: 1.16637e-05
Minimum value: 1e-05
Maximum value: 2e-05
Name: EW/Sin2ThetaW
Type: Parameter
- Description:
- The square of the sine of the weak mixing angel
Default value: 0.232
Minimum value: 0
Maximum value: 1
Name: EW/RunningAlphaEM
Type: Reference to objects of class ThePEG::AlphaEMBase
- Description:
- Reference to an object capable of calculating the running electro-magnetic coupling at a given scale
Name: EW/AlphaEMMZ
Type: Parameter
- Description:
- The electro-magnetic coupling constant at the Z mass.
Default value: 0.00775735
Minimum value: 0
Maximum value: 1
Name: EW/AlphaEM
Type: Parameter
- Description:
- The electro-magnetic coupling constant at zero momentum transfer.
Default value: 0.00729714
Minimum value: 0
Maximum value: 1
Name: NumberOfFamilies
Type: Integer parameter
- Description:
- The number of families assumed in the Standard model.
Default value: 3
Minimum value: 0
Maximum value: 5