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

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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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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.58.114011

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Matching at one loop for the four-quark operators in NRQCD