AlphaSUN Class Reference

#include <StandardModel.h>

Public Member Functions
	AlphaSUN ()
	Constructors.
virtual	~AlphaSUN ()
	Destructor.
virtual void	initAlpha (int nCin, int nFin, int orderIn=1, double alphaIn=0.12, double scaleIn=91.188)
	Initialization for given value at M_Z and given order.
virtual void	initLambda (int nCin, int nFin, int orderIn=1, double LambdaIn=0.2)
	Initialization for given value of Lambda and given order.
double	alpha (double scale2in)
	alpha(Q^2), whole or split, and Lambda values. More...
double	alpha1Ord (double scale2in)
	Return the first-order alpha value at a squared scale for given Lambda.
double	alpha2OrdCorr (double scale2in)
	Return the correction factor from first to desired order.
double	Lambda () const

Detailed Description

The AlphaSUN class calculates the running coupling alpha in an SU(N) model, as a function of the scale, to first, second or third order. Formally part of beyond-the-Standard-Model scenarios, e.g. Hidden Valleys, but put here since it is closely related to alpha_strong.

Member Function Documentation

double alpha

(

double

scale2in

)

alpha(Q^2), whole or split, and Lambda values.

Return the alpha value at a squared scale.

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The documentation for this class was generated from the following files:

• include/Pythia8/StandardModel.h
• src/StandardModel.cc