Tesi etd-01272015-093233 |
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Tipo di tesi
Tesi di dottorato di ricerca
Autore
OBERHOF, BENJAMIN
URN
etd-01272015-093233
Titolo
Measurement of BF(tau -> l gamma nu nu, (l=e, mu)) at BaBar
Settore scientifico disciplinare
FIS/04
Corso di studi
SCIENZE DI BASE
Relatori
tutor Giorgi, Marcello
relatore Lusiani, Alberto
controrelatore Costantini, Flavio
commissario Passera, Massimo
commissario Barlow, Roger
commissario Prof. Konishi, Kenichi
relatore Lusiani, Alberto
controrelatore Costantini, Flavio
commissario Passera, Massimo
commissario Barlow, Roger
commissario Prof. Konishi, Kenichi
Parole chiave
- tau
- decays
- leptonic
- radiative
- B-factory
- BaBar
- anomalous
- magnetic
- moment
- g-2
Data inizio appello
23/02/2015
Consultabilità
Non consultabile
Data di rilascio
23/02/2085
Riassunto
We perform a measurement of the branching fractions of radiative leptonic tau decays for a minimum photon energy of 10 MeV in the τ rest frame, using 431 inverse femto-barn of electron-positron 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 BF(τ -> μγν¯ν) = (3.69±0.03±0.10)×10−3, and B(τ -> eγν¯ν) = (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.
the first quoted error is statistical, and the second is systematic. These results are substantially more precise than previous measurements.
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