2-loop QCD corrections to Bc-meson leptonic constant

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We present results for two-loop QCD corrections to the short distance coefficient that governs leptonic decay of Bc-meson. After brief discussion of the technics of asymptotic threshold expansion used to perform this calculation, we give comments on the numerical value of two-loop corrections and its impact on NRQCD description of Bc-meson bound state dynamics.
12 pages, 1 figure, v2: typos in appendix corrected; v3: Mathematica ant text files with results attached

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/177555

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/0302132
 http://arxiv.org/abs/hep-ph/0302132
 Eur.Phys.J.C50:801-808,2007
 doi:10.1140/epjc/s10052-007-0255-1

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