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Branching Fraction for B+ -] Pi0 L+ Nu, Measured in Upsilon (4S) -] BBbar Events Tagged by B- -] D0 L- Nubar (X) Decays

出版	United States. Department of Energy, 2005
URL	http://books.google.com.hk/books?id=FdKjAQAACAAJ&hl=&source=gbs_api

註釋We report a preliminary branching fraction of (1.80 {+-} 0.37{sub stat.} {+-} 0.23{sub syst.}) x 10{sup -4} for the charmless exclusive semileptonic B{sup +} {yields} {pi}{sup 0}{ell}{sup +}{nu} decay, where {ell} can be either a muon or an electron. This result is based on data corresponding to an integrated luminosity of 81 fb{sup -1} collected at the {Upsilon}(4S) resonance with the BABAR detector. The analysis uses B{bar B} events that are tagged by a B meson reconstructed in the semileptonic B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}(X) decays, where X can be either a {gamma} or a {pi}{sup 0} from a D* decay.