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Matching at one loop for the four-quark operators in NRQCD

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arxiv hep-ph/9802365 v1 pith:EREY5TQT submitted 1998-02-19 hep-ph

A. Pineda , J. Soto (U. de Barcelona) This is my paper · ORCID
classification hep-ph
keywords matchingfour-quarkinfraredloopnrqcdoperatorscalculatedcases
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The matching coefficients for the four-quark operators in NRQCD (NRQED) are calculated at one loop using dimensional regularization for ultraviolet and infrared divergences. The matching for the electromagnetic current follows easily from our results. Both the unequal and equal mass cases are considered. The role played by the Coulomb infrared singularities is explained in detail.

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