Search for rare hadronic B decays

OPAL Collaboration

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A search for rare decays of B hadrons has been performed using approximately two million hadronic Z0 decays collected by the OPAL experiment between 1990 and 1993. The exclusive decay channels Bd0 → π+ π-, Bd0 → K+π-, Bs0 → π+K- and Bs0 → K+K- have been studied. Such decays include contributions from flavour changing neutral current processes such as hadronic penguin decays. No significant excess of events has been observed in the π+π-, π+K- and K+K- invariant mass distributions. Consequently, upper limits on the Bd0 branching ratios, Br(Bd0→π+π-) < 4.7 × 10-5 and Br(Bd0→K+π-) < 8.1 × 10-5, and on the Bs0 branching ratios, Br(Bs0→π+K-) < 2.6 × 10-4 and Br(Bs0→K+K-) < 1.4 × 10-4, have been set at the 90% confidence level. These limits assume that the ratio of the partial decay widths of the Z0, λ (Z0 → bb̄)/λ(Z0 → hadrons), is 0.217 and that the fractions of Bd0 and Bs0 mesons produced during fragmentation are 39.5% and 12% respectively. The Bs0 branching ratio limits are the first such limits obtained.

Original languageEnglish
Pages (from-to)393-404
Number of pages12
JournalPhysics Letters B
Volume337
Issue number3-4
DOIs
StatePublished - 13 Oct 1994
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint

Dive into the research topics of 'Search for rare hadronic B decays'. Together they form a unique fingerprint.

Cite this