Effective Field Theory for jet substructure in heavy ion collisions

Abstract I develop an Effective Field Theory (EFT) framework to compute jet substructure observables for heavy ion collision experiments. As an example, I consider dijet events that accompany the formation of a weakly coupled long lived Quark Gluon Plasma (QGP) medium in a heavy ion collision and lo...

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Autor principal:	Varun Vaidya
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Perturbative QCD Quark-Gluon Plasma Resummation Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/97f44f0293d14641a9ecf77875b0475f
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spelling	oai:doaj.org-article:97f44f0293d14641a9ecf77875b0475f2021-11-14T12:40:23ZEffective Field Theory for jet substructure in heavy ion collisions10.1007/JHEP11(2021)0641029-8479https://doaj.org/article/97f44f0293d14641a9ecf77875b0475f2021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)064https://doaj.org/toc/1029-8479Abstract I develop an Effective Field Theory (EFT) framework to compute jet substructure observables for heavy ion collision experiments. As an example, I consider dijet events that accompany the formation of a weakly coupled long lived Quark Gluon Plasma (QGP) medium in a heavy ion collision and look at an observable insensitive to jet selection bias: the simultaneous measurement of jet mass along with the transverse momentum imbalance between the jets that are groomed to remove soft radiation. Treating the jet as an open quantum system, I write down a factorization formula within the SCET (Soft Collinear Effective Theory) framework in the forward scattering regime. The physics of the medium is encoded in a universal soft field correlator while the jet-medium interaction is captured by a medium induced jet function. The factorization formula leads to a Lindblad type equation for the evolution of the reduced density matrix of the jet in the Markovian approximation. The solution for this equation allows a resummation of large logarithms that arise due to the final state measurements imposed while simultaneously summing over multiple incoherent interactions of the jet with the medium.Varun VaidyaSpringerOpenarticlePerturbative QCDQuark-Gluon PlasmaResummationNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-47 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Perturbative QCD Quark-Gluon Plasma Resummation Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Perturbative QCD Quark-Gluon Plasma Resummation Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Varun Vaidya Effective Field Theory for jet substructure in heavy ion collisions
description	Abstract I develop an Effective Field Theory (EFT) framework to compute jet substructure observables for heavy ion collision experiments. As an example, I consider dijet events that accompany the formation of a weakly coupled long lived Quark Gluon Plasma (QGP) medium in a heavy ion collision and look at an observable insensitive to jet selection bias: the simultaneous measurement of jet mass along with the transverse momentum imbalance between the jets that are groomed to remove soft radiation. Treating the jet as an open quantum system, I write down a factorization formula within the SCET (Soft Collinear Effective Theory) framework in the forward scattering regime. The physics of the medium is encoded in a universal soft field correlator while the jet-medium interaction is captured by a medium induced jet function. The factorization formula leads to a Lindblad type equation for the evolution of the reduced density matrix of the jet in the Markovian approximation. The solution for this equation allows a resummation of large logarithms that arise due to the final state measurements imposed while simultaneously summing over multiple incoherent interactions of the jet with the medium.
format	article
author	Varun Vaidya
author_facet	Varun Vaidya
author_sort	Varun Vaidya
title	Effective Field Theory for jet substructure in heavy ion collisions
title_short	Effective Field Theory for jet substructure in heavy ion collisions
title_full	Effective Field Theory for jet substructure in heavy ion collisions
title_fullStr	Effective Field Theory for jet substructure in heavy ion collisions
title_full_unstemmed	Effective Field Theory for jet substructure in heavy ion collisions
title_sort	effective field theory for jet substructure in heavy ion collisions
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/97f44f0293d14641a9ecf77875b0475f
work_keys_str_mv	AT varunvaidya effectivefieldtheoryforjetsubstructureinheavyioncollisions
_version_	1718429119754010624

Effective Field Theory for jet substructure in heavy ion collisions

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