Search for the rare decay $B \to \pi l^+ l^-$

Abstract : We have performed a search for the flavor-changing neutral-current decays B --> pi l+l-, where l+l- is either e+e- or mu+mu-, using a sample of 230 million Y(4S)-->BBbar decays collected with the BABAR detector. We observe no evidence of a signal and measure the upper limit on the isospin-averaged branching fraction to be BF(B --> pi l+ l-) < 9.1 x 10^{-8} at 90% confidence level. We also search for the lepton-flavor--violating decays B --> pi e mu and measure an upper limit on the isospin-averaged branching fraction of BF(B --> pi e mu) < 9.2 x 10^{-8} at 90% confidence level.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00137610
Contributor : Claudine Bombar <>
Submitted on : Tuesday, March 20, 2007 - 5:19:51 PM
Last modification on : Saturday, June 19, 2021 - 4:15:52 AM

Citation

B. Aubert, M. Bona, D. Boutigny, Y. Karyotakis, J.P. Lees, et al.. Search for the rare decay $B \to \pi l^+ l^-$. Physical Review Letters, American Physical Society, 2007, 99, pp.051801. ⟨10.1103/PhysRevLett.99.051801⟩. ⟨in2p3-00137610⟩

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