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Download or read book Measurement of the B0 to Pi L Nu Form Factor Shape and Branching Fraction, and Determination of written by and published by . This book was released on 2006 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report the results of a study of the exclusive charmless semileptonic B° →?−l? decay undertaken with approximately 227 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector. The analysis uses events in which the signal B mesons are reconstructed with a novel loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the l+? invariant mass squared, from which we extract the f+(q2) form factor shape and the total branching fraction:?(B° →?−l+?) = 1.44 ± 0.08{sub stat} ± 0.10{sub syst} x 10−4. Based on a recent theoretical calculation of the form factor, we find the magnitude of the CKM matrix element.