1982•JETP Lett. (Engl. Transl.); (United States)Requires access

Decays of. pi. /sup + -/ mesons involving axions and massless axions:. pi -->. l+. nu. /sub l/+a(a')

A.A. Anselm, Vladimir M. Lobashev, Nikolai Uraltsev

Abstract

Decays of the type ..pi../sup -/..-->.. l/sup -/+nu-tilde/sub l/+a are analyzed. The probability for the electron version of the decay is B(..pi../sup -/..-->.. e/sup -/+v/sub e/+a)approx.10/sup -9/, which is comparable to the width of the primary background decay, ..pi../sup -/..-->.. e/sup -/+v/sub e/+..gamma... Events which do not correspond to a two-particle kinematics can be identified, in the absence of an accompanying ..gamma.. ray, as decays of the type ..pi../sup -/..-->.. e/sup -/+v/sub e/+a.

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Key concepts: Physics, Massless particle, Particle decay, Meson, Pi, Elementary particle, Particle physics, Pion