Determination of the resonant parameters of chic0(3915) with global fit
Abstract
The chic0(3915) was observed firstly by the Belle experiment in the omega J/psi invariant mass spectrum in the process B -> K omegaJ/psi, and then confirmed by the Babar experiment. The two experiments reported the resonant parameters of this particle in the both processes gammagamma -> omegaJ/psi and B -> K omega J/psi by assuming chic0(3915) as a S-wave Breit-Wigner resonance. We perform a global fit to the distributions of invariant mass of omega J/psi measured by the Belle and Babar experiments, and incorporate the measurement by the LHCb experiment additionally to extract the mass and width of chic0(3915). We obtain M = 3921.0 +/- 0.9 MeV/c2 and Gamma = 17.9 +/- 2.4 MeV which are consistent with the values on PDG within one standard deviation but with improved precision.
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