We perform a measurement of the τ→lγνν¯ (l=e,μ) branching fractions for a minimum photon energy of 10 MeV in the τ rest frame, using 431  fb−1 of e+e− collisions collected at the center-of-mass energy of the ϒ(4S) resonance with the BABAR detector at the PEP-II storage rings. We find ℬ(τ→μγνν¯)=(3.69±0.03±0.10)×10−3 and ℬ(τ→eγνν¯)=(1.847±0.015±0.052)×10−2, where the first quoted error is statistical and the second is systematic. These results are substantially more precise than previous measurements.

Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2015). Measurement of the branching fractions of the radiative leptonic tau decays tau -> e gamma v(v)over-bar and tau -> mu gamma v(v)over-bar at BABAR. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 91(5), 1-7 [10.1103/PhysRevD.91.051103].

Measurement of the branching fractions of the radiative leptonic tau decays tau -> e gamma v(v)over-bar and tau -> mu gamma v(v)over-bar at BABAR

PATRIGNANI, CLAUDIA;
2015

Abstract

We perform a measurement of the τ→lγνν¯ (l=e,μ) branching fractions for a minimum photon energy of 10 MeV in the τ rest frame, using 431  fb−1 of e+e− collisions collected at the center-of-mass energy of the ϒ(4S) resonance with the BABAR detector at the PEP-II storage rings. We find ℬ(τ→μγνν¯)=(3.69±0.03±0.10)×10−3 and ℬ(τ→eγνν¯)=(1.847±0.015±0.052)×10−2, where the first quoted error is statistical and the second is systematic. These results are substantially more precise than previous measurements.
2015
Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2015). Measurement of the branching fractions of the radiative leptonic tau decays tau -> e gamma v(v)over-bar and tau -> mu gamma v(v)over-bar at BABAR. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 91(5), 1-7 [10.1103/PhysRevD.91.051103].
Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lee, M. J.; Ly...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/534680
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