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Title: Polarization effects in radiative decay of a polarized τ lepton

The polarization effects in the one-meson radiative decay of a polarized τ lepton, τ → π{sup −}γν{sub τ}, are investigated. The inner bremsstrahlung and structural amplitudes are taken into account. The asymmetry of the differential decay width caused by the τ-lepton polarization and the Stokes parameters of the emitted photon itself are calculated depending on the polarization of the decaying τ lepton. These physical quantities are estimated numerically for an arbitrary direction of the τ lepton polarization 3-vector in the rest frame. The vector and axial-vector form factors describing the structure-dependent part of the decay amplitude are determined using the chiral effective theory with resonances (RχT)
Authors:
; ; ;  [1]
  1. NSC “Kharkov Institute of Physics and Technology” (Ukraine)
Publication Date:
OSTI Identifier:
22472399
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 120; Journal Issue: 2; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; CHIRALITY; DECAY AMPLITUDES; FORM FACTORS; INTERNAL BREMSSTRAHLUNG; MESONS; PHOTONS; PIONS MINUS; POLARIZATION; RADIATIVE DECAY; RESONANCE PARTICLES; STOKES PARAMETERS; TAU NEUTRINOS; TAU PARTICLES