Combined analysis of γγ→D(D) and γγ→ωJ/ψ data from Belle and BaBar experiments
The B-meson-factory experiments Belle and BaBar,via the studies of the two-photon processes of γγ→D(D)and γγ→ωJ/ψ,observed the charmonium state xc2(2P)in the invariant-mass spectrum of D(D)and the charmonium-like state X(3915)on the invariant-mass spectrum of ωJ/ψ,which greatly prompted the research progress of the charmonium and charmonium-like states.Limited by the statistics,single-signal functions were used to fit to experimental data in these analy-sis works.In this paper,we try to do a simultaneous fit using double-signal functions,in addition to single-signal functions,to analyze these experimental data.The obtained result provides a new per-spective to the interpretation of the experimental data,and is helpful to our understandings of the properties of xc2(2P)and,in particular,X(3915).
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