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arXiv · 2403.01017

Determination of the resonant parameters of chi_c0(3915) with global fit

Chunhua Li·Xijun Wang·Chen Wu
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Abstract

The chi_c0(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 chi_c0(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 chi_c0(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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Chunhua Li, Xijun Wang, Chen Wu. 2024-03-01. Determination of the resonant parameters of chi_c0(3915) with global fit. https://doi.org/10.1088/1674-1137/ad3943

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