Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-05-31
Phys.Rev. D60 (1999) 114036
Physics
High Energy Physics
High Energy Physics - Phenomenology
47 pages LaTeX file including 8 figures, submitted to Phys. Rev. D
Scientific paper
10.1103/PhysRevD.60.114036
We propose and analyze an improved small-x equation which incorporates exact leading and next-to-leading BFKL kernels on one hand and renormalization group constraints in the relevant collinear limits on the other. We work out in detail the recently proposed omega-expansion of the solution, derive the Green's function factorization properties and discuss both the gluon anomalous dimension and the hard pomeron. The resummed results are stable, nearly renormalization-scheme independent, and join smoothly with the fixed order perturbative regime. Two critical hard pomeron exponents are provided, which - for reasonable strong-coupling extrapolations - are argued to provide bounds on the pomeron intercept.
Ciafaloni Marcello
Colferai Dimitri
Salam Gavin P.
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