Muon Decay Spectrum: Leading Logarithmic Approximation

Andrei Gaponenko (Alberta U.); Andrej Arbuzov; Andrzej Czarnecki

Muon Decay Spectrum: Leading Logarithmic Approximation

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arxiv hep-ph/0202102 v2 pith:7A6CQC7A submitted 2002-02-11 hep-ph

Muon Decay Spectrum: Leading Logarithmic Approximation

Andrej Arbuzov , Andrzej Czarnecki , Andrei Gaponenko (Alberta U.) This is my paper

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keywords decaymuonspectrumalphaangularapproximationcorrectionscurrent

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O(alpha^2 ln^2(m_mu/m_e)) QED corrections to the electron spectrum and angular distribution in muon decay are evaluated. Impact on the determination of Michel parameters is estimated. Current theoretical uncertainty in the muon decay distributions is discussed.

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