Effects of non-standard couplings, radiative corrections and neutrino masses on the lepton spectrum in $μ$ and $τ$ decays

Details Effects of non-standard couplings, radiative corrections and neutrino masses on the lepton spectrum in $μ$ and $τ$ decays Effects of non-standard couplings, radiative corrections and neutrino masses on the lepton spectrum in $μ$ and $τ$ decays

1993-12-17

arxiv.org/abs/hep-ph/9312301v2

Phys.Lett.B324:109-116,1994; ERRATUM-ibid.B329:526,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, ZU-TH 21/93, also available with anonymous ftp from pss058.psi.ch in /pub/preprints/mudecay.ps

Scientific paper

10.1016/0370-2693(94)00079-4

We investigate the combined effect of neutrino masses and non-standard couplings on the various lepton spectra in $\mu$ and $\tau$ decays. We emphasize the energy spectra of the neutrinos, which can be measured in the new KARMEN experiment and hence will yield novel information on deviations from the $V-A$ structure. To constrain these couplings, QED radiative corrections have to be taken into account. We evaluated them and found small corrections to the neutrino spectra.

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