Two photon width of heavy pseudoscalar mesons
Nicola Fabiano, Giulia Pancheri
Abstract
We discuss the partial width of the pseudoscalar charmonium state etac and bottomonium state etab into two photons. Predictions from potential models are examined and compared with experimental values for the etac case. Through the NRQCD factorisation procedure results for etac are also compared with those from J/psi data, and results for etab to the Upsilon decay data.
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