Observation of Bs -> J/Ïf'2(1525) in J/ÏK+K- final states
arXiv:1112.4695 · doi:10.1103/PhysRevLett.108.151801
Abstract
The decay Bs -> J/ÏK+ K- is investigated using 0.16/fb of data collected with the LHCb detector using 7 TeV pp collisions. Although the J/ÏÏ 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. After subtracting the non-resonant component, we find B(Bs->J/Ïf'_2(1525))/B(Bs->J/ÏÏ)=(26.4 +/- 2.7 +/- 2.4)%.
7 pages, 5 figures, v2 many revisions, submitted to PRL