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Forward Z-boson production and the unintegrated sea quark density

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arxiv 1205.1759 v2 pith:7DLA4QTC submitted 2012-05-08 hep-ph

classification hep-ph
keywords formulaforwardinitial-statelargemomentumproductionquarktransverse
verification ladder T0 review T1 audit T2 compute T3 formal
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Drell-Yan production in the forward region at the Large Hadron Collider is sensitive to multiple radiation of QCD partons not collinearly ordered, emitted over large rapidity intervals. We propose a method to take account of these radiative contributions via a factorization formula which depends on the unintegrated, or transverse momentum dependent, splitting function associated with the evolution of the initial-state sea quark distribution. We analyze this formula numerically, and point out kinematic effects from the initial-state transverse momentum on the vector boson spectrum.

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