Transverse momentum resummation at small x for the Tevatron and LHC
Stefan Berge, Pavel Nadolsky, Fredrick Olness, C. -P. Yuan
Abstract
Analysis of semi-inclusive DIS hadroproduction suggests broadening of transverse momentum distributions at x below a few 10-3, which can be modeled in the Collins-Soper-Sterman formalism by a modification of impact-parameter-dependent parton densities. We discuss the consequences of such a modification for the production of electroweak bosons at hadron-hadron colliders. If substantial small-x broadening is observed in forward Z boson production in the Tevatron Run-2, it will strongly affect predicted transverse momentum distributions for W, Z, and Higgs boson production at the Large Hadron Collider.
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