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Search for the Rare Decays B --> pi l+l- and B0 --> eta l+l-

By J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, D. Derkach, G. Grosdidier, F. Le Diberder, A. M. Lutz, B. Malaescu, P. Roudeau, M. H. Schune, A. Stocchi, G. Wormser, D. Bernard, M. Verderi, S. Emery, G. Hamel De Monchenault, G. Vasseur, Ch. Yèche, S. Akar, E. Ben-Haim, M. Bomben, G.R. Bonneaud, H. Briand, G. Calderini, J. Chauvau, O. Hamon, Ph. Leruste, G. Marchiori, J. Ocariz and S. Sitt

Abstract

18 pages, 6 figures, submitted to Phys. Rev. D - See paper for full list of authorsWe present the results of a search for the rare flavor-changing neutral-current decays B --> pi l+l- (pi=pi+/-, pi0 and l = e,mu) and B0 --> eta l+l- using a sample of e+e- --> Y(4S) BB decays decays corresponding to 428 fb^-1 of integrated luminosity collected by the BABAR detector. No significant signal is observed, and we set an upper limit on the isospin and lepton-flavor averaged branching fraction of BF(B --> pi l+l-) < 7.0 x 10^-8 and a lepton-flavor averaged upper limit of BF(B0 --> eta l+l-) < 9.2 x 10^-8, both at the 90% confidence level. We also report 90% confidence level branching fraction upper limits for the individual modes B+ --> pi+ e+e-, B0 --> pi0 e+e-, B+ --> pi+ mu+mu-, B0 --> pi0 mu+mu-, B0 --> eta e+e-, and B0 --> eta mu+mu-

Topics: [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: American Physical Society
Year: 2013
DOI identifier: 10.1103/PhysRevD.88.032012
OAI identifier: oai:HAL:in2p3-00804676v1
Provided by: Hal-Diderot
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