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

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Matching at one loop for the four quark operators in NRQCD

A. Pineda
(
- Barcelona U. and
- Barcelona, Autonoma U.
)
,
J. Soto
(
- Barcelona U. and
- Barcelona, Autonoma U.
)

Feb, 1998

19 pages

Published in:

Phys.Rev.D 58 (1998) 114011

e-Print:

hep-ph/9802365 [hep-ph]

DOI:

10.1103/PhysRevD.58.114011

Report number:

UB-ECM-PF-97-16

View in:

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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.

quantum chromodynamics: nonrelativistic
operator: (4quark)
perturbation theory: higher-order
regularization: dimensional
current: electromagnetic
quark: mass
infrared problem: singularity
renormalization
HQET model
quantum electrodynamics: nonrelativistic

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