Recent Results in Semileptonic B Decays With BaBar

2011/10/10 by Hamilton, P. M.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.1110.2141

Abstract

In this note, recent results of studies of semileptonic B meson decays from \babar are discussed and preliminary results given. In particular, a recent measurement of B(B → D^(*)τν) and the ratio B(B → D^(*)τν)/B(B → D^(*)ℓ ν) is presented. For the D^* mode, a branching fraction of 1.79±0.13\stat±0.17\syst is found, with a ratio of 0.325±0.023\stat±0.027\syst. For the D mode, the results are 1.04±0.12\stat±0.14\syst and 0.456±0.053\stat±0.056\syst, respectively. In addition, a study of B_s production and semileptonic decays using data collected in a center-of-mass energy region above the \Y4S resonance is discussed. The semileptonic branching fraction B(B_s → ℓ νX) is measured to be 9.9^+2.6_-2.1\stat^+1.3_-2.0\syst.

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