TY - JOUR
T1 - Observation of B̅ s0→J/ψf2′(1525) in J/ψK+K- Final States
AU - The LHCb Collaboration
AU - Aaij, R.
AU - Playfer, Stephen
AU - Needham, Matthew
AU - Muheim, Franz
AU - Clarke, Peter
AU - Xie, Yuehong
AU - Eisenhardt, Stephan
N1 - Long author list - awaiting processing
PY - 2012/4/9
Y1 - 2012/4/9
N2 - In this Letter the decay Bs -> J/\psi K+ K- is investigated. Although the J/\psi \phi\ channel is well known, final states at higher K+K- masses have not previously been studied. In the K+K- mass spectrum we observe a significant signal in the f'2(1525) region as well as a non-resonant component. The ratio of the rate in a K+K- mass window of +/- 125 MeV around the f'2 relative to that in the J/\psi \phi\ decay, where \phi -> K+K-, is R=(19.4 +/- 1.8 +/- 1.0)%. Our sample consists of 0.16/fb collected with the LHCb detector using 7 TeV pp collisions.
AB - In this Letter the decay Bs -> J/\psi K+ K- is investigated. Although the J/\psi \phi\ channel is well known, final states at higher K+K- masses have not previously been studied. In the K+K- mass spectrum we observe a significant signal in the f'2(1525) region as well as a non-resonant component. The ratio of the rate in a K+K- mass window of +/- 125 MeV around the f'2 relative to that in the J/\psi \phi\ decay, where \phi -> K+K-, is R=(19.4 +/- 1.8 +/- 1.0)%. Our sample consists of 0.16/fb collected with the LHCb detector using 7 TeV pp collisions.
UR - http://www.scopus.com/inward/record.url?scp=84859567724&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.108.151801
DO - 10.1103/PhysRevLett.108.151801
M3 - Article
VL - 108
SP - 497
EP - 505
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
ER -