A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator

Abstract

Parton-shower event generators that go beyond the collinear-ordering approximation at small x have so far included only gluon and valence quark channels at transverse momentum dependent level. We describe results of recent work to include effects of the sea-quark distribution with explicit dependence on the transverse quark-momentum.This sea-quark density is then applied to the description of forward Z -production. The qq*->Z matrix element (with one off-shell quark) is calculated in an explicit gauge invariant way, making use of high energy factorization. The kT-factorized result has been implemented into the CCFM Monte-Carlo CASCADE and a numerical comparison with the qg*->Zq matrix element has been carried out.

4 pages, 4 figures, based on a talk given at the XXI Workshop on Deep-Inelastic Scattering and Related Subjects, 11-15 April, Newport News, Virginia (2011)

References in corpus (8)

• The CCFM Monte Carlo generator CASCADE 2.2.0
• High Energy Resummation of Drell-Yan Processes
• Forward-Central Jet Correlations at the Large Hadron Collider
• Production of electroweak gauge bosons in off-shell gluon-gluon fusion
• Prompt photon photoproduction at HERA within the framework of the quark Reggeization hypothesis
• Jets in the forward region at the LHC
• The high energy behavior of QCD: The effective action and the triple-Pomeron-vertex
• TMD PDFs: a Monte Carlo implementation for the sea quark distribution

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• Precision DIS data and TMD parton distributions
• The Mueller-Tang jet impact factor at NLO from the high energy effective action