First observation of Bs → J/ψf0(980) decays
Gershon, T. J.
Harrison, P. F.
Whitehead, M. (Mark)
Williams, M. P.
- Publisher: Elsevier Science BV
arxiv: Nuclear Theory | Nuclear Experiment | High Energy Physics::Experiment
Using data collected with the LHCb detector in proton–proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the system. Using a fit to the π+π− mass spectrum with interfering resonances gives . In the interval ±90 MeV around 980 MeV, corresponding to approximately two full f0 widths we also find , where in both cases the uncertainties are statistical and systematic, respectively.