Medium-induced gluon radiation beyond the eikonal approximation

In this work we improve existing calculations of radiative energy loss by computing corrections that implement energy-momentum conservation, previously only implemented a posteriori, in a rigorous way. Using the path-integral formalism, we compute in-medium splittings allowing transverse motion of a...

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Detalles Bibliográficos
Autores principales: Apolinário, Liliana, Armesto, Néstor, Milhano, Guilherme, Salgado, Carlos A.
Lenguaje:eng
Publicado: 2014
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2014.07.032
http://cds.cern.ch/record/1699085
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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 In this work we improve existing calculations of radiative energy loss by computing corrections that implement energy-momentum conservation, previously only implemented a posteriori, in a rigorous way. Using the path-integral formalism, we compute in-medium splittings allowing transverse motion of all particles in the emission process, thus relaxing the assumption that only the softest particle is permitted such movement. This work constitutes the extension of the computation carried out for x$\rightarrow$1 in Phys. Lett. B718 (2012) 160-168, to all values of x, the momentum fraction of the energy of the parent parton carried by the emitted gluon. In order to accomplish a general description of the whole in-medium showering process, in this work we allow for arbitrary formation times for the emitted gluon. We provide general expressions and their realisation in the path integral formalism within the harmonic oscillator approximation.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-16990852022-07-16T02:02:10Zdoi:10.1016/j.nuclphysa.2014.07.032http://cds.cern.ch/record/1699085engApolinário, LilianaArmesto, NéstorMilhano, GuilhermeSalgado, Carlos A.Medium-induced gluon radiation beyond the eikonal approximationParticle Physics - PhenomenologyIn this work we improve existing calculations of radiative energy loss by computing corrections that implement energy-momentum conservation, previously only implemented a posteriori, in a rigorous way. Using the path-integral formalism, we compute in-medium splittings allowing transverse motion of all particles in the emission process, thus relaxing the assumption that only the softest particle is permitted such movement. This work constitutes the extension of the computation carried out for x$\rightarrow$1 in Phys. Lett. B718 (2012) 160-168, to all values of x, the momentum fraction of the energy of the parent parton carried by the emitted gluon. In order to accomplish a general description of the whole in-medium showering process, in this work we allow for arbitrary formation times for the emitted gluon. We provide general expressions and their realisation in the path integral formalism within the harmonic oscillator approximation.In this work we improve existing calculations of radiative energy loss by computing corrections that implement energy–momentum conservation, previously only implemented a posteriori, in a rigorous way. Using the path-integral formalism, we compute in-medium splittings allowing transverse motion of all particles in the emission process, thus relaxing the assumption that only the softest particle is permitted such movement. This work constitutes the extension of the computation carried out for x→1 in L. Apolinario et al. (2012) [5] , to all values of x , the momentum fraction of the energy of the parent parton carried by the emitted gluon. In order to accomplish a general description of the whole in-medium showering process, in this work we allow for arbitrary formation times for the emitted gluon (the limit of small formation times was previously employed in J.-P. Blaizot et al., 2013 [6] , for the g→gg splitting). We provide general expressions and their realisation in the path integral formalism within the harmonic oscillator approximation.In this work we improve existing calculations of radiative energy loss by computing corrections that implement energy-momentum conservation, previously only implemented a posteriori, in a rigorous way. Using the path-integral formalism, we compute in-medium splittings allowing transverse motion of all particles in the emission process, thus relaxing the assumption that only the softest particle is permitted such movement. This work constitutes the extension of the computation carried out for x$\rightarrow$1 in Phys. Lett. B718 (2012) 160-168, to all values of x, the momentum fraction of the energy of the parent parton carried by the emitted gluon. In order to accomplish a general description of the whole in-medium showering process, in this work we allow for arbitrary formation times for the emitted gluon. We provide general expressions and their realisation in the path integral formalism within the harmonic oscillator approximation.arXiv:1404.7079oai:cds.cern.ch:16990852014-04-28
spellingShingle Particle Physics - Phenomenology
Apolinário, Liliana
Armesto, Néstor
Milhano, Guilherme
Salgado, Carlos A.
Medium-induced gluon radiation beyond the eikonal approximation
title Medium-induced gluon radiation beyond the eikonal approximation
title_full Medium-induced gluon radiation beyond the eikonal approximation
title_fullStr Medium-induced gluon radiation beyond the eikonal approximation
title_full_unstemmed Medium-induced gluon radiation beyond the eikonal approximation
title_short Medium-induced gluon radiation beyond the eikonal approximation
title_sort medium-induced gluon radiation beyond the eikonal approximation
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.nuclphysa.2014.07.032
http://cds.cern.ch/record/1699085
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AT armestonestor mediuminducedgluonradiationbeyondtheeikonalapproximation
AT milhanoguilherme mediuminducedgluonradiationbeyondtheeikonalapproximation
AT salgadocarlosa mediuminducedgluonradiationbeyondtheeikonalapproximation

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