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- W2555234015 abstract "Introduction Heavy quarkonia have a rich spectroscopy with many narrow states lying under the threshold of open flavour production[1]. The success of theoretical model predictions with experiments can provide important information about the quark-antiquark interactions.The decay rates of cc meson is studied in the conventional Van Royen-Weisskopf (VW)formula with and without radiative correction[2] and NRQCD formalism in terms of their short distance and long distance coefficients [1, 3]. The long distance coefficients are obtained through phenomenological potential model description of the mesons. The mass spectrum of the cc meson is reviewed in non-relativistic phenomenological quark antiquark potential of the type V (r) = −αc r + Ar , with ν varying from 0.5 to 2[1]. By incorporating the relativistic corrections of order v to the heavy quarkonium decays into two photons and the vector state into lepton pairs are computed within the NRQCD formalism. It is expected that the NRQCD formalism has all the corrective contributions for the right predictions of the decay rates. NRQCD factorization expressions for the decay rates of quarkonium and decay are given by [4]" @default.
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- W2555234015 date "2009-01-01" @default.
- W2555234015 modified "2023-10-16" @default.
- W2555234015 title "Deca y rate of excited states of charmonium" @default.
- W2555234015 hasPublicationYear "2009" @default.
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