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

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 dependenc...

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Detalles Bibliográficos
Autores principales: Hautmann, F., Hentschinski, M., Jung, H.
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/1470780
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author Hautmann, F.
Hentschinski, M.
Jung, H.
author_facet Hautmann, F.
Hentschinski, M.
Jung, H.
author_sort Hautmann, F.
collection CERN
description 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.
id cern-1470780
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14707802023-05-03T02:19:54Zhttp://cds.cern.ch/record/1470780engHautmann, F.Hentschinski, M.Jung, H.A kT-dependent sea-quark density for the CASCADE Monte Carlo event generatorParticle Physics - PhenomenologyParton-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.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.arXiv:1207.6420oai:cds.cern.ch:14707802012-07-30
spellingShingle Particle Physics - Phenomenology
Hautmann, F.
Hentschinski, M.
Jung, H.
A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator
title A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator
title_full A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator
title_fullStr A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator
title_full_unstemmed A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator
title_short A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator
title_sort kt-dependent sea-quark density for the cascade monte carlo event generator
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/1470780
work_keys_str_mv AT hautmannf aktdependentseaquarkdensityforthecascademontecarloeventgenerator
AT hentschinskim aktdependentseaquarkdensityforthecascademontecarloeventgenerator
AT jungh aktdependentseaquarkdensityforthecascademontecarloeventgenerator
AT hautmannf ktdependentseaquarkdensityforthecascademontecarloeventgenerator
AT hentschinskim ktdependentseaquarkdensityforthecascademontecarloeventgenerator
AT jungh ktdependentseaquarkdensityforthecascademontecarloeventgenerator

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