Cargando…

Jet-hadron correlations relative to the event plane at the LHC with ALICE

In ultra relativistic heavy-ion collisions at the Large Hadron Collider (LHC), conditions are met to produce a hot, dense and strongly interacting medium known as the Quark Gluon Plasma (QGP). Quarks and gluons from incoming nuclei collide to produce partons at high momenta early in the collisions....

Descripción completa

Detalles Bibliográficos
Autor principal: Mazer, Joel
Lenguaje:eng
Publicado: 2017
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2017.05.108
http://cds.cern.ch/record/2300409
_version_ 1780957183717933056
author Mazer, Joel
author_facet Mazer, Joel
author_sort Mazer, Joel
collection CERN
description In ultra relativistic heavy-ion collisions at the Large Hadron Collider (LHC), conditions are met to produce a hot, dense and strongly interacting medium known as the Quark Gluon Plasma (QGP). Quarks and gluons from incoming nuclei collide to produce partons at high momenta early in the collisions. By fragmenting into collimated sprays of hadrons, these partons form 'jets'. The outgoing partons scatter and interact with the medium, leading to a manifestation of medium modifications of jets in the final state, known as jet quenching. Within the framework of perturbative QCD, jet production is well understood in pp collisions. We use jets measured in pp interactions as a baseline reference for comparing to heavy-ion collision systems to detect and study jet quenching. The jet quenching mechanism can be studied through the angular correlations of jets with charged hadrons and is examined in transverse momentum ( p T ) bins of the jets, p T bins of the associated hadrons, and as a function of collision centrality. A robust and precise background subtraction method is used in this analysis to remove the complex, flow dominated, heavy-ion background. The analysis of angular correlations for different orientations of the jet relative to the event plane allows for the study of the path-length dependence of medium modifications to jets. The event plane dependence of azimuthal angular correlations of charged hadrons with respect to the axis of an R=0.2 reconstructed full (charged + neutral) jet in Pb–Pb collisions at sNN=2.76 TeV in ALICE is presented. Results are compared for three angular bins of the jet relative to the event plane in mid-peripheral events. The yields relative to the event plane are presented and then quantified through yield ratio calculations. The results show no significant path-length dependence on the medium modifications.
id oai-inspirehep.net-1628319
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
record_format invenio
spelling oai-inspirehep.net-16283192019-10-15T14:49:56Zdoi:10.1016/j.nuclphysa.2017.05.108http://cds.cern.ch/record/2300409engMazer, JoelJet-hadron correlations relative to the event plane at the LHC with ALICEParticle Physics - ExperimentIn ultra relativistic heavy-ion collisions at the Large Hadron Collider (LHC), conditions are met to produce a hot, dense and strongly interacting medium known as the Quark Gluon Plasma (QGP). Quarks and gluons from incoming nuclei collide to produce partons at high momenta early in the collisions. By fragmenting into collimated sprays of hadrons, these partons form 'jets'. The outgoing partons scatter and interact with the medium, leading to a manifestation of medium modifications of jets in the final state, known as jet quenching. Within the framework of perturbative QCD, jet production is well understood in pp collisions. We use jets measured in pp interactions as a baseline reference for comparing to heavy-ion collision systems to detect and study jet quenching. The jet quenching mechanism can be studied through the angular correlations of jets with charged hadrons and is examined in transverse momentum ( p T ) bins of the jets, p T bins of the associated hadrons, and as a function of collision centrality. A robust and precise background subtraction method is used in this analysis to remove the complex, flow dominated, heavy-ion background. The analysis of angular correlations for different orientations of the jet relative to the event plane allows for the study of the path-length dependence of medium modifications to jets. The event plane dependence of azimuthal angular correlations of charged hadrons with respect to the axis of an R=0.2 reconstructed full (charged + neutral) jet in Pb–Pb collisions at sNN=2.76 TeV in ALICE is presented. Results are compared for three angular bins of the jet relative to the event plane in mid-peripheral events. The yields relative to the event plane are presented and then quantified through yield ratio calculations. The results show no significant path-length dependence on the medium modifications.oai:inspirehep.net:16283192017
spellingShingle Particle Physics - Experiment
Mazer, Joel
Jet-hadron correlations relative to the event plane at the LHC with ALICE
title Jet-hadron correlations relative to the event plane at the LHC with ALICE
title_full Jet-hadron correlations relative to the event plane at the LHC with ALICE
title_fullStr Jet-hadron correlations relative to the event plane at the LHC with ALICE
title_full_unstemmed Jet-hadron correlations relative to the event plane at the LHC with ALICE
title_short Jet-hadron correlations relative to the event plane at the LHC with ALICE
title_sort jet-hadron correlations relative to the event plane at the lhc with alice
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/j.nuclphysa.2017.05.108
http://cds.cern.ch/record/2300409
work_keys_str_mv AT mazerjoel jethadroncorrelationsrelativetotheeventplaneatthelhcwithalice