We search for the decays B-→ K-γ and B̄0→ K̄0γ in a data sample of 228×106 BB̄ pairs collected at the Υ(4S) resonance with the BABAR detector. We measure the branching fraction B(B-→ K-γ)=(3.5±0.6±0.4)×10-6 and set an upper limit B(B̄0→ K̄0γ)<2.7×10-6 at the 90% confidence level. We also measure the direct CP asymmetry in B-→ K-γ, ACP=(-26±14±5)%. The uncertainties are statistical and systematic, respectively.

Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2007). Measurement of B decays to Kγ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 75(5) [10.1103/PhysRevD.75.051102].

Measurement of B decays to Kγ

CARPINELLI, Massimo;
2007

Abstract

We search for the decays B-→ K-γ and B̄0→ K̄0γ in a data sample of 228×106 BB̄ pairs collected at the Υ(4S) resonance with the BABAR detector. We measure the branching fraction B(B-→ K-γ)=(3.5±0.6±0.4)×10-6 and set an upper limit B(B̄0→ K̄0γ)<2.7×10-6 at the 90% confidence level. We also measure the direct CP asymmetry in B-→ K-γ, ACP=(-26±14±5)%. The uncertainties are statistical and systematic, respectively.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2007
75
5
051102
none
Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2007). Measurement of B decays to Kγ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 75(5) [10.1103/PhysRevD.75.051102].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/10281/389710
Citazioni
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 3
Social impact