TY - JOUR
T1 - Expanding running coupling effects in the hard Pomeron
AU - Ciafaloni, M.
AU - Colferai, D.
AU - Salam, G. P.
AU - Staśto, A. M.
PY - 2002
Y1 - 2002
N2 - We study QCD hard processes at scales of order (Formula presented) in the limit in which the beta-function coefficient b is taken to be small, but (Formula presented) is kept fixed. The (nonperturbative) Pomeron is exponentially suppressed in this limit, making it possible to define purely perturbative high-energy Green’s functions. The hard Pomeron exponent acquires diffusion and running coupling corrections which can be expanded in the b parameter and turn out to be dependent on the effective coupling (Formula presented) where Y is rapidity of the process. We provide a general setup for this b expansion and we calculate the first few terms both analytically and numerically.
AB - We study QCD hard processes at scales of order (Formula presented) in the limit in which the beta-function coefficient b is taken to be small, but (Formula presented) is kept fixed. The (nonperturbative) Pomeron is exponentially suppressed in this limit, making it possible to define purely perturbative high-energy Green’s functions. The hard Pomeron exponent acquires diffusion and running coupling corrections which can be expanded in the b parameter and turn out to be dependent on the effective coupling (Formula presented) where Y is rapidity of the process. We provide a general setup for this b expansion and we calculate the first few terms both analytically and numerically.
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U2 - 10.1103/PhysRevD.66.054014
DO - 10.1103/PhysRevD.66.054014
M3 - Article
AN - SCOPUS:0242680647
SN - 1550-7998
VL - 66
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
ER -