Model-Independent Results for the Decay B \to L Nu(L) Gamma at BaBar

Conference · Mon Apr 09 00:00:00 EDT 2012

OSTI ID:1038436

Lindemann, D M

We present a search for the radiative leptonic decays B{sub +} {yields} e{sup +} {nu}{sub e}{gamma} and B{sup +} {yields} {mu}{sup +}{nu}{sub {mu}}{gamma} using data collected by the BABAR detector at the PEP-II B factory. We fully reconstruct the hadronic decay of one of the B mesons in {Upsilon}(4S) {yields} B{sup +}B{sup -} and then search for evidence of the signal decay within the rest of the event. This method provides clean kinematic information on the signal's missing energy and high momentum photon and lepton, and allows for a model-independent analysis of this decay. Using a data sample of 465 million B-meson pairs, we obtain sensitivity to branching fractions of the same order as predicted by the Standard Model. We report a model-independent branching fraction upper limit of {Beta}(B{sup +} {yields} {ell}{sup +}{nu}{sub {ell}}{gamma}) < 15.6 x 10{sup -6} ({ell} = e or {mu}) at the 90% confidence level.

• Research Organization: SLAC National Accelerator Laboratory (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1038436
• Report Number(s): SLAC-PUB-14944; arXiv:0909.5689
• Conference Information: To appear in the proceedings of Meeting of the Division of Particles and Fields of the American Physical Society (DPF 2009), Detroit, Michigan, 26-31 Jul 2009
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
DECAY
Experiment-HEP
HEPEX
LEPTONIC DECAY
PHOTONS
SENSITIVITY
STANDARD MODEL