volume 42, issue 7, P2293-2299 1990
DOI: 10.1103/physrevd.42.2293
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Abstract: We derive a general expression, correct to order v 2 / c 2 and valid in any potential model, for the angular distribution of photons in the parity-changing one-photon radiative decays of quarkonia, in terms of its different multipole contributions El, M2, and E3. The expression is given in terms of Clebsch-Gordan coefficients and six reduced matrix elements. We make detailed numerical calculations for the radiative decays of charmonium using Buchmiiller-Tye and Gupta-Radford-Repko potential models and find th…

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