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 428fb-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-.

Search for the rare decays B→πℓ^{+}ℓ^{-} and B^{0}→ηℓ^{+}ℓ^{-}

LANCERI, LIVIO;VITALE, LORENZO;
2013-01-01

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 428fb-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-.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2769131
 Avviso

Registrazione in corso di verifica.
La registrazione di questo prodotto non è ancora stata validata in ArTS.

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 12
social impact