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

Abstract : We present results of a search for the rare flavor-changing neutral-current decay B --> pi l+ l-, based on a data sample corresponding to 209 fb-1 of integrated luminosity collected with the BABAR detector at the PEP-II B Factory. We reconstruct the four exclusive B decay modes B+ --> pi+ l+ l- and B0 --> pi0 l+ l-, where l is either an e or mu. We find no evidence for a signal, and we obtain the upper limit at 90% confidence level on the lepton-flavor--averaged branching fraction to be BF(B+ --> pi+ l+ l-) = 2 x tau_B+/tau_B0 x BF(B0 --> pi0 l+ l-) < 7.9 x 10-8. We also obtain an upper limit at 90% confidence level on the lepton-flavor--violating decay B --> pi e mu of BF(B --> pi e mu) < 9.8 x 10-8.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00115482
Contributor : Dominique Girod <>
Submitted on : Tuesday, November 21, 2006 - 2:41:17 PM
Last modification on : Thursday, June 17, 2021 - 3:46:58 AM

### Citation

B. Aubert, R. Barate, M. Bona, D. Boutigny, F. Couderc, et al.. Search for the rare decay $B \to \pi \ell^+ \ell^-$. XXXIII International Conference on High Energy Physics (ICHEP'06), Jul 2006, Moscow, Russia. ⟨in2p3-00115482⟩

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