Matching at one loop for the four-quark operators in NRQCD
Open Access
- 28 October 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 58 (11), 114011
- https://doi.org/10.1103/physrevd.58.114011
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.Keywords
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