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Is the X(3915) the chi_{c0}(2P)?
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The Particle Data Group has assigned the X(3915) meson, an omega J/psi mass peak seen in B-> omega J/psi decays and in two-photon fusion reactions gamma-gamma->omega J/psi, as the chi_{c0}(2P), the 2^3P_0 charmonium state. Here it is shown that if the X(3915) is the chi_{c0}(2P), the measured strength of the gamma-gamma->X(3915) signal implies an upper limit on the branching fraction Bf(chi_{c0}(2P)->omega J/psi)<7.8% that conflicts with a >14.3% lower limit derived for the same quantity from the B-> K X(3915) decay rate. Also, the absence any signal for X(3915)-> D0 D0-bar in B+ -> K+ D0 D0-bar decays is used to establish the limit Bf(X(3915)->D0 D0-bar) < 1.2xBf(X(3915)->omega J/psi). This contradicts expectations that chi_{c0}(2P) decays to D0 D0-bar would be a dominant process, while decays to omega J/psi, which are Okubo-Zweig-Iizuka suppressed, would be relatively rare. These, plus reasons given earlier by Guo and Meissner, raise serious doubts about the X(3915)=chi_{c0}(2P) assignment.
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Cited by 1 Pith paper
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Discovery potential of charmonium $2P$ states through the $e^+e^- \to \gamma D\bar{D}$ processes
Using the measured e+e- -> gamma X(3872) cross section as a reference, the authors predict measurable e+e- -> gamma chi_c0(2P) and e+e- -> gamma chi_c2(2P) production and propose the gamma D Dbar final state as a sear...
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