TY - JOUR
T1 - Measurement of the B0s→J/ψK∗0 branching fraction and angular amplitudes
AU - Playfer, Stephen
AU - The LHCb Collaboration
AU - Needham, Matthew
AU - Muheim, Franz
AU - Clarke, Peter
AU - Xie, Yuehong
AU - Eisenhardt, Stephan
PY - 2012/10/8
Y1 - 2012/10/8
N2 - A search for the decay B0s→J/ψK∗0 with K∗0→K−π+ is performed with 0.37 fb−1 of pp collisions at s√ = 7 TeV collected by the LHCb experiment, finding a \Bs→JψK−π+ peak of 114±11 signal events. The K−π+ mass spectrum of the candidates in the B0s peak is dominated by the K∗0 contribution. Subtracting the non-resonant K−π+ component, the branching fraction of \BsJpsiKst is (4.4+0.5−0.4±0.8)×10−5, where the first uncertainty is statistical and the second systematic. A fit to the angular distribution of the decay products yields the \Kst polarization fractions fL=0.50±0.08±0.02 and f∣∣∣∣=0.19+0.10−0.08±0.02.
AB - A search for the decay B0s→J/ψK∗0 with K∗0→K−π+ is performed with 0.37 fb−1 of pp collisions at s√ = 7 TeV collected by the LHCb experiment, finding a \Bs→JψK−π+ peak of 114±11 signal events. The K−π+ mass spectrum of the candidates in the B0s peak is dominated by the K∗0 contribution. Subtracting the non-resonant K−π+ component, the branching fraction of \BsJpsiKst is (4.4+0.5−0.4±0.8)×10−5, where the first uncertainty is statistical and the second systematic. A fit to the angular distribution of the decay products yields the \Kst polarization fractions fL=0.50±0.08±0.02 and f∣∣∣∣=0.19+0.10−0.08±0.02.
U2 - 10.1103/PhysRevD.86.071102
DO - 10.1103/PhysRevD.86.071102
M3 - Article
VL - D86
SP - 071102
JO - Physical Review D, particles, fields, gravitation, and cosmology
JF - Physical Review D, particles, fields, gravitation, and cosmology
ER -