Measurement of the B0 ->&#960&#8722&#8467&#957and B ->&#951(&#8242)&#8467&#957Branching Fractions, the B0 ->&#960&#8722&#8467&#957and B ->&#951&#8467&#957Form-Factor Shapes, and Determination of |Vub|

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We report the results of a study of the exclusive charmless semileptonic decays, B{sup +} {yields} {eta}{sup {prime}}{ell}{sup +}{nu} and B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu}, undertaken with approximately 464 million B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for B{sup +} {yields} {eta}{ell}{sup +}{nu} and B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu} decays in three and 12 bins of q{sup 2}, respectively, from which we extract the f{sub +}(q{sup 2}) form-factor shapes and ... continued below

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16 pages

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del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP et al. August 12, 2011.

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We report the results of a study of the exclusive charmless semileptonic decays, B{sup +} {yields} {eta}{sup {prime}}{ell}{sup +}{nu} and B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu}, undertaken with approximately 464 million B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for B{sup +} {yields} {eta}{ell}{sup +}{nu} and B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu} decays in three and 12 bins of q{sup 2}, respectively, from which we extract the f{sub +}(q{sup 2}) form-factor shapes and the total branching fractions {Beta}(B{sup +} {yields} {eta}{ell}{sup +}{nu}) = (0.36 {+-} 0.05{sub stat} {+-} 0.04{sub syst}) x 10{sup -4} and {Beta}(B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu}) = (1.42 {+-} 0.05{sub stat} {+-} 0.07{sub syst}) x 10{sup -4}. We also measure {Beta}(B{sup +} {yields} {eta}{sup {prime}}{ell}{sup +}{nu}) = (0.24 {+-} 0.08{sub stat} {+-} 0.03{sub syst}) x 10{sup -4}. We obtain values for the magnitude of the CKM matrix element |V{sub ub}| using three different QCD calculations.

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16 pages

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  • Journal Name: Phys.Rev.D83:052011,2011; Journal Volume: 83; Journal Issue: 5

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  • Report No.: SLAC-PUB-14267
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1022579
  • Archival Resource Key: ark:/67531/metadc833019

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  • August 12, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Nov. 29, 2016, 7:39 p.m.

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del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP et al. Measurement of the B0 ->&#960&#8722&#8467&#957and B ->&#951(&#8242)&#8467&#957Branching Fractions, the B0 ->&#960&#8722&#8467&#957and B ->&#951&#8467&#957Form-Factor Shapes, and Determination of |Vub|, article, August 12, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc833019/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.