Title
Observation of <tex>$B_{s}^{0}\rightarrow K^{+}K^{-}$</tex> and measurements of branching fractions of charmless two-body decays of <tex>$B^{0}$</tex> and <tex>$B_{s}^{0}$</tex> mesons in <tex>$\overline{p}p$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV Observation of <tex>$B_{s}^{0}\rightarrow K^{+}K^{-}$</tex> and measurements of branching fractions of charmless two-body decays of <tex>$B^{0}$</tex> and <tex>$B_{s}^{0}$</tex> mesons in <tex>$\overline{p}p$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
97(2006) :21 , p. 211802,1-211802,7
ISSN
0031-9007
ISI
000242219900009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We search for decays of the type B(s)0→h+h′- (where h,h′=K or π) in 180  pb-1 of p&#773; 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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/295b7f/fa23c1c0.pdf
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