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

Abstract : We 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-.
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Contributor : Sabine Starita <>
Submitted on : Tuesday, March 26, 2013 - 10:13:19 AM
Last modification on : Wednesday, September 16, 2020 - 4:14:29 PM

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J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Search for the Rare Decays B --> pi l+l- and B0 --> eta l+l-. Physical Review D, American Physical Society, 2013, 88, pp.032012. ⟨10.1103/PhysRevD.88.032012⟩. ⟨in2p3-00804676⟩



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