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Energy loss and (de)coherence effects beyond eikonal approximation

The parton branching process is known to be modified in the presence of a medium. Colour decoherence processes are known to determine the process of energy loss when the density of the medium is large enough to break the correlations between partons emitted from the same parent. In order to improve...

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Detalles Bibliográficos
Autores principales: Apolinário, Liliana, Armesto, Néstor, Milhano, Guilherme, Salgado, Carlos A.
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2014.09.103
http://cds.cern.ch/record/1746907
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author Apolinário, Liliana
Armesto, Néstor
Milhano, Guilherme
Salgado, Carlos A.
author_facet Apolinário, Liliana
Armesto, Néstor
Milhano, Guilherme
Salgado, Carlos A.
author_sort Apolinário, Liliana
collection CERN
description The parton branching process is known to be modified in the presence of a medium. Colour decoherence processes are known to determine the process of energy loss when the density of the medium is large enough to break the correlations between partons emitted from the same parent. In order to improve existing calculations that consider eikonal trajectories for both the emitter and the hardest emitted parton, we provide in this work, the calculation of all finite energy corrections for the gluon radiation off a quark in a QCD medium that exist in the small angle approximation and for static scattering centres. Using the path integral formalism, all particles are allowed to undergo Brownian motion in the transverse plane and the offspring allowed to carry an arbitrary fraction of the initial energy. The result is a general expression that contains both coherence and decoherence regimes that are controlled by the density of the medium and by the amount of broadening that each parton acquires independently.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-17469072023-03-14T17:56:10Zdoi:10.1016/j.nuclphysa.2014.09.103http://cds.cern.ch/record/1746907engApolinário, LilianaArmesto, NéstorMilhano, GuilhermeSalgado, Carlos A.Energy loss and (de)coherence effects beyond eikonal approximationhep-phThe parton branching process is known to be modified in the presence of a medium. Colour decoherence processes are known to determine the process of energy loss when the density of the medium is large enough to break the correlations between partons emitted from the same parent. In order to improve existing calculations that consider eikonal trajectories for both the emitter and the hardest emitted parton, we provide in this work, the calculation of all finite energy corrections for the gluon radiation off a quark in a QCD medium that exist in the small angle approximation and for static scattering centres. Using the path integral formalism, all particles are allowed to undergo Brownian motion in the transverse plane and the offspring allowed to carry an arbitrary fraction of the initial energy. The result is a general expression that contains both coherence and decoherence regimes that are controlled by the density of the medium and by the amount of broadening that each parton acquires independently.The parton branching process is known to be modified in the presence of a medium. Colour decoherence processes are known to determine the process of energy loss when the density of the medium is large enough to break the correlations between partons emitted from the same parent. In order to improve existing calculations that consider eikonal trajectories for both the emitter and the hardest emitted parton, we provide in this work the calculation of all finite energy corrections for the gluon radiation off a quark in a QCD medium that exist in the small angle approximation and for static scattering centres. Using the path integral formalism, all particles are allowed to undergo Brownian motion in the transverse plane and the offspring is allowed to carry an arbitrary fraction of the initial energy. The result is a general expression that contains both coherence and decoherence regimes that are controlled by the density of the medium and by the amount of broadening that each parton acquires independently.The parton branching process is known to be modified in the presence of a medium. Colour decoherence processes are known to determine the process of energy loss when the density of the medium is large enough to break the correlations between partons emitted from the same parent. In order to improve existing calculations that consider eikonal trajectories for both the emitter and the hardest emitted parton, we provide in this work, the calculation of all finite energy corrections for the gluon radiation off a quark in a QCD medium that exist in the small angle approximation and for static scattering centres. Using the path integral formalism, all particles are allowed to undergo Brownian motion in the transverse plane and the offspring allowed to carry an arbitrary fraction of the initial energy. The result is a general expression that contains both coherence and decoherence regimes that are controlled by the density of the medium and by the amount of broadening that each parton acquires independently.arXiv:1407.7985oai:cds.cern.ch:17469072014-07-30
spellingShingle hep-ph
Apolinário, Liliana
Armesto, Néstor
Milhano, Guilherme
Salgado, Carlos A.
Energy loss and (de)coherence effects beyond eikonal approximation
title Energy loss and (de)coherence effects beyond eikonal approximation
title_full Energy loss and (de)coherence effects beyond eikonal approximation
title_fullStr Energy loss and (de)coherence effects beyond eikonal approximation
title_full_unstemmed Energy loss and (de)coherence effects beyond eikonal approximation
title_short Energy loss and (de)coherence effects beyond eikonal approximation
title_sort energy loss and (de)coherence effects beyond eikonal approximation
topic hep-ph
url https://dx.doi.org/10.1016/j.nuclphysa.2014.09.103
http://cds.cern.ch/record/1746907
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AT armestonestor energylossanddecoherenceeffectsbeyondeikonalapproximation
AT milhanoguilherme energylossanddecoherenceeffectsbeyondeikonalapproximation
AT salgadocarlosa energylossanddecoherenceeffectsbeyondeikonalapproximation