We present the results of a search for the rare flavor-changing neutral-current decays B→πℓ+ℓ− (π=π±, π0 and ℓ=e, μ) and B0→ηℓ+ℓ− using a sample of e+e−→Υ(4S)→BB⎯⎯⎯ 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 ℬ(ℬ→πℓ+ℓ−)<5.9×10−8 and a lepton-flavor averaged upper limit of ℬ(ℬ0→ηℓ+ℓ−)<6.4×10−8, both at the 90% confidence level. We also report 90% confidence level branching fraction upper limits for the individual modes B+→π+e+e−, B0→π0e+e−, B+→π+μ+μ−, B0→π0μ+μ−, B0→ηe+e−, and B0→ημ+μ−.

Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Search for the rare decays B -> pi l(+)l(-) and B-0 -> eta l(+)l(-). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88(3), 1-16 [10.1103/PhysRevD.88.032012].

Search for the rare decays B -> pi l(+)l(-) and B-0 -> eta l(+)l(-)

PATRIGNANI, CLAUDIA;
2013

Abstract

We present the results of a search for the rare flavor-changing neutral-current decays B→πℓ+ℓ− (π=π±, π0 and ℓ=e, μ) and B0→ηℓ+ℓ− using a sample of e+e−→Υ(4S)→BB⎯⎯⎯ 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 ℬ(ℬ→πℓ+ℓ−)<5.9×10−8 and a lepton-flavor averaged upper limit of ℬ(ℬ0→ηℓ+ℓ−)<6.4×10−8, both at the 90% confidence level. We also report 90% confidence level branching fraction upper limits for the individual modes B+→π+e+e−, B0→π0e+e−, B+→π+μ+μ−, B0→π0μ+μ−, B0→ηe+e−, and B0→ημ+μ−.
2013
Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Search for the rare decays B -> pi l(+)l(-) and B-0 -> eta l(+)l(-). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88(3), 1-16 [10.1103/PhysRevD.88.032012].
Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Koc...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/537358
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