We have performed a search for the flavor-changing neutral-current decays B→π + -, where + - is either e+e- or μ+μ-, using a sample of 230×106 Υ(4S)→BB̄ 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 B(B→π + -)<9.1×10-8 at 90 confidence level. We also search for the lepton-flavor-violating decays B→πe±μ and measure an upper limit on the isospin-averaged branching fraction of B(B→πe±μ )<9.2×10-8 at 90 confidence level.

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Search for the rare decay B→πl+l-. PHYSICAL REVIEW LETTERS, 99(5) [10.1103/PhysRevLett.99.051801].

Search for the rare decay B→πl+l-

CARPINELLI, Massimo;
2007

Abstract

We have performed a search for the flavor-changing neutral-current decays B→π + -, where + - is either e+e- or μ+μ-, using a sample of 230×106 Υ(4S)→BB̄ 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 B(B→π + -)<9.1×10-8 at 90 confidence level. We also search for the lepton-flavor-violating decays B→πe±μ and measure an upper limit on the isospin-averaged branching fraction of B(B→πe±μ )<9.2×10-8 at 90 confidence level.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2007
99
5
051801
none
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Search for the rare decay B→πl+l-. PHYSICAL REVIEW LETTERS, 99(5) [10.1103/PhysRevLett.99.051801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389691
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