Abstract
This paper discuses the τ→π, τ→πυτ decay process in a field formed by the super-position of two fields: a crossed constant field and and electromagnetic plane-wave field. An expression is derived for the decay probability under the assumption of a nonzero τ-neutrino mass. The dependence of the decay probability on the lepton spin and on the external-field parameters is analyzed. The variation of the decay probability with the neutrino mass and lepton spin yields information which may be useful for ascertaining the neutrino mass.
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L. B. Okun', Leptons and Quarks [in Russian], Nauka, Moscow (1981).
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 27–32, December, 1985.
The authors are indebted to Professor V. R. Khalilov for a formulation of the problem and many valuable comments.
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Klimenko, Y.I., Pavlova, O.S. & Klimenko, É.Y. τ-Lepton decay in an arbitrary plane-wave electromagnetic field. Soviet Physics Journal 28, 972–976 (1985). https://doi.org/10.1007/BF00899086
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DOI: https://doi.org/10.1007/BF00899086