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- Title
Polarization effects in radiative decay of a polarized τ lepton.
- Authors
Gakh, G.; Konchatnij, M.; Korchin, A.; Merenkov, N.
- Abstract
The polarization effects in the one-meson radiative decay of a polarized τ lepton, τ → πγν, 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).
- Subjects
POLARIZATION (Nuclear physics); LEPTONS (Nuclear physics); PARTICLE decays; BREMSSTRAHLUNG; CHIRALITY; MESOMERISM; VECTOR analysis
- Publication
Journal of Experimental & Theoretical Physics, 2015, Vol 120, Issue 2, p226
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S1063776115020120