ar X iv : h ep - p h / 03 02 22 4 v 1 2 5 Fe b 20 03 Budker INP 2003 - 13 RADIATIVE CORRECTIONS TO QCD AMPLITUDES IN QUASI - MULTI - REGGE KINEMATICS

ar X iv : h ep - p h / 03 02 22 4 v 2 2 6 Fe b 20 03 Budker INP 2003 - 13 RADIATIVE CORRECTIONS TO QCD AMPLITUDES IN QUASI - MULTI - REGGE KINEMATICS

Radiative corrections to QCD amplitudes in the quasi-multi-Regge kinematics are interesting in particular since the Reggeized form of these amplitudes is used in the derivation of the NLO BFKL. This form is a hypothesis which must be at least carefully checked, if not proved. We calculate the radiative corrections in the one-loop approximation using the s-channel unitarity. Compatibility of the...

ar X iv : h ep - p h / 03 02 22 4 v 5 2 6 M ar 2 00 3 Budker INP 2003 - 13 RADIATIVE CORRECTIONS TO QCD AMPLITUDES IN QUASI - MULTI - REGGE KINEMATICS

Radiative corrections to QCD amplitudes in the quasi-multi-Regge kinematics are interesting in particular since the Reggeized form of these amplitudes is used in the derivation of the NLO BFKL. This form is a hypothesis which must be at least carefully checked, if not proved. We calculate the radiative corrections in the one-loop approximation using the s-channel unitarity. Compatibility of the...

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.

ar X iv : h ep - p h / 03 02 18 5 v 1 2 0 Fe b 20 03 Nonlinear corrections to the DGLAP equations ; looking for the saturation limits ∗

The effects of the first nonlinear corrections to the DGLAP equations are studied in light of the HERA data. Saturation limits are determined in the DGLAP+GLRMQ approach for the free proton and for the Pb nucleus.

ar X iv : h ep - p h / 03 02 12 9 v 1 1 7 Fe b 20 03 Scalar σ meson effects in radiative ρ 0 - meson decays