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

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Title:	Matching at one loop for the four-quark operators in NRQCD
Author:	Pineda, Antonio; Soto Riera, Joan
Other authors:	Universitat de Barcelona
Abstract:	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.
Subject(s):	-Pertorbació (Matemàtica) -Partícules (Física nuclear) -Perturbation (Mathematics) -Particles (Nuclear physics)
Rights:	(c) The American Physical Society, 1998
Document type:	Article Article - Published version
Published by:	The American Physical Society
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