DE FLORIAN daniel Enrique
Next-to-next-to-Leading Logarithmic Corrections at Small Transverse Momentum in Hadronic Collisions
DANIEL DE FLORIAN; MASSIMILIANO GRAZZINI
PHYSICAL REVIEW LETTERS
AMER PHYSICAL SOC
Año: 2000 vol. 85 p. 4678 - 4678
We study the region of small transverse momenta in qq ̄- and gg-initiated processes with no colored particle detected in the final state. We present the universal expression of the O(as^2) logarithmically enhanced contributions up to next-to-next-to-leading-order logarithmic accuracy. From there we extract the coefficients that allow the resummation of the large logarithmic contributions. We find that the coefficient known in the literature as B(2) is process dependent, since it receives a hard contamination from the one-loop correction to the leading-order subprocess. We present the general result of B(2) for both quark and gluon channels.