Public Member Functions
	AlphaEM ()
	Constructors.

void	init (int orderIn, Settings *settingsPtr)
	Initialization for a given order. More...

double	alphaEM (double scale2)
	alpha_EM value. More...

Detailed Description

The AlphaEM class calculates the alpha_electromagnetic value at an arbitrary scale, given the value at 0 and m_Z, to zeroth or first order.

Member Function Documentation

double alphaEM ( double scale2 )

alpha_EM value.

Calculate alpha_EM value.

Fix alphaEM; for order = -1 fixed at m_Z.

Running alphaEM.

Initialization for a given order.

Initialize alpha_EM calculation.

Order. Read in alpha_EM value at 0 and m_Z, and mass of Z.

AlphaEM values at matching scales and matching b value.

Step down from mZ to tau/charm threshold.

Step up from me to light-quark threshold.

Fit b in range between light-quark and tau/charm to join smoothly.

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