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

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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 ... continued below

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6 pages

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Lindemann, D.M. & U., /McGill April 9, 2012.

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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.

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6 pages

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  • 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

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  • Report No.: SLAC-PUB-14944
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1038436
  • Archival Resource Key: ark:/67531/metadc841705

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  • April 9, 2012

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 7, 2016, 5:43 p.m.

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Lindemann, D.M. & U., /McGill. Model-Independent Results for the Decay B \to L Nu(L) Gamma at BaBar, article, April 9, 2012; United States. (digital.library.unt.edu/ark:/67531/metadc841705/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.