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Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes
In this note we discuss possible separations of exact, massive, tree-level spin amplitudes into gauge invariant parts. We concentrate our attention on processes involving two quarks entering a color- neutral current and, thanks to the QCD interactions, two extra external gluons. We will search for f...
Autores principales: | , |
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Lenguaje: | eng |
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2008
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-009-0977-3 http://cds.cern.ch/record/1089376 |
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author | van Hameren, A. Was, Z. |
author_facet | van Hameren, A. Was, Z. |
author_sort | van Hameren, A. |
collection | CERN |
description | In this note we discuss possible separations of exact, massive, tree-level spin amplitudes into gauge invariant parts. We concentrate our attention on processes involving two quarks entering a color- neutral current and, thanks to the QCD interactions, two extra external gluons. We will search for forms compatible with parton shower languages, without applying approximations or restrictions on phase space regions. Special emphasis will be put on the isolation of parts necessary for the construction of evolution kernels for individual splittings and to some degree for the running coupling constant as well. Our aim is to better understand the environment necessary to optimally match hard matrix elements with partons shower algorithms. To avoid complications and ambiguities related to regularization schemes, we ignore, at this point, virtual corrections. Our representation is quite universal: any color-neutral current can be used, in particular our approach is not restricted to vector currents only. |
id | cern-1089376 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2008 |
record_format | invenio |
spelling | cern-10893762023-03-12T20:50:00Zdoi:10.1140/epjc/s10052-009-0977-3http://cds.cern.ch/record/1089376engvan Hameren, A.Was, Z.Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudesParticle Physics - PhenomenologyIn this note we discuss possible separations of exact, massive, tree-level spin amplitudes into gauge invariant parts. We concentrate our attention on processes involving two quarks entering a color- neutral current and, thanks to the QCD interactions, two extra external gluons. We will search for forms compatible with parton shower languages, without applying approximations or restrictions on phase space regions. Special emphasis will be put on the isolation of parts necessary for the construction of evolution kernels for individual splittings and to some degree for the running coupling constant as well. Our aim is to better understand the environment necessary to optimally match hard matrix elements with partons shower algorithms. To avoid complications and ambiguities related to regularization schemes, we ignore, at this point, virtual corrections. Our representation is quite universal: any color-neutral current can be used, in particular our approach is not restricted to vector currents only.In this note we discuss possible separations of exact, massive, tree-level spin amplitudes into gauge invariant parts. We concentrate our attention on processes involving two quarks entering a color- neutral current and, thanks to the QCD interactions, two extra external gluons. We will search for forms compatible with parton shower languages, without applying approximations or restrictions on phase space regions. Special emphasis will be put on the isolation of parts necessary for the construction of evolution kernels for individual splittings and to some degree for the running coupling constant as well. Our aim is to better understand the environment necessary to optimally match hard matrix elements with partons shower algorithms. To avoid complications and ambiguities related to regularization schemes, we ignore, at this point, virtual corrections. Our representation is quite universal: any color-neutral current can be used, in particular our approach is not restricted to vector currents only.arXiv:0802.2182CERN-PH-TH-2008-023IFJPAN-IV-2007-12CERN-PH-TH-2008-023IFJ-PAN-IV-2007-12oai:cds.cern.ch:10893762008-02-18 |
spellingShingle | Particle Physics - Phenomenology van Hameren, A. Was, Z. Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes |
title | Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes |
title_full | Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes |
title_fullStr | Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes |
title_full_unstemmed | Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes |
title_short | Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes |
title_sort | gauge invariant sub-structures of tree-level double-emission exact qcd spin amplitudes |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1140/epjc/s10052-009-0977-3 http://cds.cern.ch/record/1089376 |
work_keys_str_mv | AT vanhamerena gaugeinvariantsubstructuresoftreeleveldoubleemissionexactqcdspinamplitudes AT wasz gaugeinvariantsubstructuresoftreeleveldoubleemissionexactqcdspinamplitudes |