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 431fb-1 of e+e- collisions collected at the center-of-mass energy of the (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.
Titolo: | Measurement of the branching fractions of the radiative leptonic τ decays τ →eγν ν ¯ and τ →μγν ν ¯ at BABAR |
Autori: | |
Data di pubblicazione: | 2015 |
Rivista: | |
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 431fb-1 of e+e- collisions collected at the center-of-mass energy of the (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. |
Handle: | http://hdl.handle.net/11368/2871956 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.91.051103 |
URL: | http://journals.aps.org/prd/issues/91/5 |
Appare nelle tipologie: | 1.1 Articolo in Rivista |
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Measurement of the D0 →π-e+νe differential decay branching fraction as a function of q2 and study of form factor parametrizations -postprint.pdf | pdf post-print | Bozza finale post-referaggio (post-print) | Digital Rights Management non definito | Open Access Visualizza/Apri |
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