Phys. Rev. Lett. 80, 3189–3192 (1998)

Non-Abelian Dipole Radiation and the Heavy Quark Expansion

Abstract

References

Citing Articles (12)

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Andrzej Czarnecki^* and Kirill Melnikov
Institut für Theoretische Teilchenphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany

Nikolai Uraltsev^†
Department of Physics, University of Notre Dame du Lac, Notre Dame, Indiana 46556

Received 9 September 1997; published in the issue dated 13 April 1998

Dipole radiation in QCD is derived to the second order in α_s. A powerlike evolution of the spin-singlet heavy quark operators is obtained to the same accuracy. We give an O(α_s²) relation between the short-distance low-scale running heavy quark mass and the mass in the modified minimal subtraction scheme. We discuss the properties of an effective QCD coupling α_s^(d)(E) which governs the dipole radiation. We argue that this coupling is advantageous for describing heavy quark physics.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.80.3189

DOI:

10.1103/PhysRevLett.80.3189

PACS:

12.39.Hg, 12.38.Bx

^*Present address: Physics Department, Brookhaven National Laboratory, Upton, New York 11973.

^†Permanent address: Petersburg Nuclear Physics Institute, Gatchina, 188350 St. Petersburg, Russia.

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Phys. Rev. Lett. 80, 3189–3192 (1998)

Non-Abelian Dipole Radiation and the Heavy Quark Expansion