# Changes between Version 2 and Version 3 of GammaZ

Ignore:
Timestamp:
04/12/12 11:01:21 (8 years ago)
Comment:

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Unmodified
 v2 * Calculate analytically the cross section for  $e^+ e^- \to \mu^+ \mu^-$ as function of the CMS energy, including both exchange of a photon and a Z boson. Neglect masses of the external fermions. Compare your result with Software.MadGraph. MadGraph. * The Forward-Backward asymmetry is $A_{FB}(\theta)=\frac{ d\sigma (\theta) - d\sigma(\pi-\theta)}{ d\sigma (\theta) + d\sigma(\pi-\theta)}$.