Observation of <script type="math/tex">B_{s}^{0}\rightarrow K^{+}K^{-}</script> and measurements of branching fractions of charmless two-body decays of <script type="math/tex">B^{0}</script> and <script type="math/tex">B_{s}^{0}</script> mesons in <script type="math/tex">\overline{p}p</script> collisions at <script type="math/tex">\sqrt{s}</script>=1.96 TeV

Abulencia, A.; Van Remortel, N.; et al.

doi:10.1103/PHYSREVLETT.97.211802

Title

Observation of $B_{s}^{0}\rightarrow K^{+}K^{-}$ and measurements of branching fractions of charmless two-body decays of $B^{0}$ and $B_{s}^{0}$ mesons in $\overline{p}p$ collisions at $\sqrt{s}$ =1.96 TeV

Author

Abulencia, A.

Van Remortel, N.

et al.

Institution/Organisation

CDF Collaboration

Abstract

We search for decays of the type B(s)0→h+h′- (where h,h′=K or π) in 180 pb-1 of p̅ p collisions collected at the Tevatron by the upgraded Collider Detector at Fermilab. We report the first observation of the new mode Bs0→K+K- with a yield of 236±32 events, corresponding to (fs/fd)×B(Bs0→K+K-)/B(B0→K+π-)=0.46±0.08(stat)±0.07(syst), where fs/fd is the ratio of production fractions of Bs0 and B0. We find results in agreement with world averages for the B0 modes, and set the following new limits at 90% C.L.: B(Bs0→K-π+)<5.6×10-6 and B(Bs0→π+π-)<1.7×10-6.

Language

English

Source (journal)

Physical review letters. - New York, N.Y., 1958, currens

Publication

New York, N.Y. : American Physical Society , 2006

ISSN

0031-9007 [print]

1079-7114 [online]

DOI

10.1103/PHYSREVLETT.97.211802

Volume/pages