ar X iv : h ep - p h / 03 02 13 2 v 3 2 2 Ja n 20 07 2 - loop QCD corrections to B c - meson leptonic constant .
نویسنده
چکیده
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 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. PACS: 12.39.Jh, 13.25.Gv, 14.40.Lb, 14.40.Nd
منابع مشابه
ar X iv : h ep - p h / 03 02 13 2 v 1 1 7 Fe b 20 03 2 - loop QCD corrections to B c - meson leptonic constant .
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 twoloop corrections and its impact on NRQCD description of Bc-meson bound state dynamics.
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تاریخ انتشار 2007