We search for b --> smu+ mu- transitions in B meson (B+, B0, or B0(s)) decays with 924 pb-1 of p anti-p collisions at s**(1/2) =1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. We find excesses with significances of 4.5, 2.9, and 2.4 standard deviations in the B+ --> mu+ mu- K+, B0 --> mu+ mu- K*(892)0, and B0(s) --> mu+ mu- phi decay modes, respectively. Using B --> J/psi h (h =K+, K*(892)0, and B0(s) --> mu+ mu- phi decay modes, we report branching fractions for the previously observed B+ and B0 decays, B(B+ --> mu+ mu- K+) =(0.59 +/- 0.15 +/- 0.04) x 10-6, and B(B0 --> mu+ mu-K*(892)0) =(0.81 +/- 0.30 +/- 0.10) x 10-6, where the first uncertainty is statistical, and the second is systematic. These measurements are consistent with the world average results, and are competitive with the best available measurements. We set an upper limit on the relative branching fraction B(B0(s) --> mu+ mu-phi)/(B(B0(s) --> J/phi phi) < 2.6(2.3) x 10-3 at the 95(90)% confidence level, which is the most stringent to date.

Search for the Rare B Decays B+ --> mu+ mu- K+, B0 --> mu+ mu- K*(892)0, and B0(s) --> mu+ mu- phi at CDF

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2009

Abstract

We search for b --> smu+ mu- transitions in B meson (B+, B0, or B0(s)) decays with 924 pb-1 of p anti-p collisions at s**(1/2) =1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. We find excesses with significances of 4.5, 2.9, and 2.4 standard deviations in the B+ --> mu+ mu- K+, B0 --> mu+ mu- K*(892)0, and B0(s) --> mu+ mu- phi decay modes, respectively. Using B --> J/psi h (h =K+, K*(892)0, and B0(s) --> mu+ mu- phi decay modes, we report branching fractions for the previously observed B+ and B0 decays, B(B+ --> mu+ mu- K+) =(0.59 +/- 0.15 +/- 0.04) x 10-6, and B(B0 --> mu+ mu-K*(892)0) =(0.81 +/- 0.30 +/- 0.10) x 10-6, where the first uncertainty is statistical, and the second is systematic. These measurements are consistent with the world average results, and are competitive with the best available measurements. We set an upper limit on the relative branching fraction B(B0(s) --> mu+ mu-phi)/(B(B0(s) --> J/phi phi) < 2.6(2.3) x 10-3 at the 95(90)% confidence level, which is the most stringent to date.
A. Castro; M. Deninno; P. Mazzanti; N. Moggi; F. Rimondi; F. Semeria; S. Zucchelli
File in questo prodotto:
Eventuali allegati, non sono esposti

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: http://hdl.handle.net/11585/84529
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 37
  • ???jsp.display-item.citation.isi??? 24
social impact