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Two photon width of heavy pseudoscalar mesons

Nicola Fabiano·Giulia Pancheri
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Abstract

We discuss the partial width of the pseudoscalar charmonium state eta_c and bottomonium state eta_b into two photons. Predictions from potential models are examined and compared with experimental values for the eta_c case. Through the NRQCD factorisation procedure results for eta_c are also compared with those from J/psi data, and results for eta_b to the Upsilon decay data.

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Nicola Fabiano, Giulia Pancheri. 2002-10-21. Two photon width of heavy pseudoscalar mesons. https://arxiv.org/abs/hep-ph/0210279

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