Polarization effects in radiative decay of polarized $\tau$ lepton

Abstract

The polarization effects in the one-meson radiative decay of the polarized $\tau$ lepton, ${\tau }^{-}\to {\pi }^{-}\gamma {\nu }_{\tau }$, are investigated. The inner bremsstrahlung and structural amplitudes are taken into account. The asymmetry of the differential decay width caused by the $\tau$ lepton polarization and the Stokes parameters of the emitted photon itself, are calculated depending on the polarization of the decaying $\tau$ lepton. The numerical estimation of these physical quantities was done for arbitrary direction of the $\tau$ 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 (R$\chi$T).

arXiv comment37 pages,7 figures

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Cited by in corpus (2)

• Azimuthal distributions in radiative decay of polarized $\tau$ lepton
• About The Polarized $\tau$ Lepton Radiative Decay