Leptonic widths of heavy quarkonia : QCD / NRQCD matching for the electromagnetic current at O ( α s v 2 )

Abstract

We construct the S-wave part of the electromagnetic vector annihilation current to O(α s v 2), where v is the non-relativistic quark velocity, for heavy quarks whose dynamics are described by the NRQCD action on the lattice. The NRQCD vector current for Q ¯ Q annihilation is expressed as a linear combination of lattice operators with quantum numbers L = 0… (More)

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Cite this paper

@inproceedings{HartLeptonicWO, title={Leptonic widths of heavy quarkonia : QCD / NRQCD matching for the electromagnetic current at O ( α s v 2 )}, author={A. Hart and G. M. von and R. R. Horgan} }