Non-Abelian Dipole Radiation and the Heavy Quark Expansion

Details Non-Abelian Dipole Radiation and the Heavy Quark Expansion Non-Abelian Dipole Radiation and the Heavy Quark Expansion

1997-08-15

arxiv.org/abs/hep-ph/9708372v1

Phys.Rev.Lett. 80 (1998) 3189-3192

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, Latex

Scientific paper

10.1103/PhysRevLett.80.3189

Dipole radiation in QCD is derived to the second order in $\alpha_s$. A power-like evolution of the spin-singlet heavy quark operators is obtained to the same accuracy. In particular, ${\cal O}(\alpha_s^2)$ relation between a short-distance low-scale running heavy quark mass and the $\barMS$ mass is given. We discuss the properties of the effective QCD coupling $\aw(E)$ which governs the dipole radiation. This coupling is advantageous for heavy quark physics.

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