2 00 4 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.
منابع مشابه
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 .
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
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We give a review and present a comprehensive calculations for the leptonic constant fBcof the low-lying pseudoscalar and vector states of Bc-meson in the framework of static and QCD-motivated nonrelativistic potential models taking into account the one-loop and two-loop QCD corrections in the short distance coefficient that governs the leptonic constant of Bc quarkonium system. Further, we use ...
متن کاملar 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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We give a review and present a comprehensive calculation for the leptonic constant fBc of the low-lying pseudoscalar and vector states of Bc-meson in the framework of static and QCD-motivated nonrelativistic potential models taking into account the one-loop and two-loop QCD corrections in the short distance coefficient that governs the leptonic constant of Bc quarkonium system. Further, we use ...
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تاریخ انتشار 2004