Corrections of Order αα_s to W Boson Decays [PDF]
Dominik KaraWe present the calculation of the mixed two-loop QCD/electroweak corrections to hadronic W boson decays within the Standard Model. The optical theorem is applied to the W boson two-point function. The multi-scale integrals are computed with the help of asymptotic expansions, which factorize the three-loop diagrams into one- and two-loop vacuum and propagator-type integrals.View original: http://arxiv.org/abs/1307.7190
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