The next-to-leading order forward jet vertex in the small-cone approximation

Details The next-to-leading order forward jet vertex in the small-cone approximation The next-to-leading order forward jet vertex in the small-cone approximation

2012-02-06

arxiv.org/abs/1202.1082v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 4 figures; a few comments and one reference added; a few inessential misprints removed; version to appear on JHEP

Scientific paper

We consider within QCD collinear factorization the process p+p to jet + jet +X, where two forward high-$p_T$ jets are produced with a large separation in rapidity $\Delta y$ (Mueller-Navelet jets). In this case the (calculable) hard part of the reaction receives large higher-order corrections $\sim \alpha^n_s (\Delta y)^n$, which can be accounted for in the BFKL approach. In particular, we calculate in the next-to-leading order the impact factor (vertex) for the production of a forward high-$p_T$ jet, in the approximation of small aperture of the jet cone in the pseudorapidity-azimuthal angle plane. The final expression for the vertex turns out to be simple and easy to implement in numerical calculations.

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