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Accès ouvert déclaré 2023 article

Dielectron production at midrapidity at low transverse momentum in peripheral and semi-peripheral Pb–Pb collisions at $$ {\sqrt{s}}_{\textrm{NN}} $$ = 5.02 TeV

7Citations signalées, ce qui n’est pas une note de qualité
143Institutions déclarées
36Pays d’affiliation déclarés

Rattachement africain : in, fr, cz, de, ch, it, kr, sk, cn, mx, pl, pk, us, no, ro, gr, hu, gb, br, se, pe, dk, at, Afrique du Sud, nl, jp, cu, hr, az, am, fi, th, tr, bg, id, ua. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

Abstract The first measurement of the e+e− pair production at low lepton pair transverse momentum (pT,ee) and low invariant mass (mee) in non-central Pb–Pb collisions at $$ {\sqrt{s}}_{\textrm{NN}} $$ s NN = 5.02 TeV at the LHC is presented. The dielectron production is studied with the ALICE detector at midrapidity (|ηe| < 0.8) as a function of invariant mass (0.4 ≤ mee< 2.7 GeV/c2) in the 50–70% and 70–90% centrality classes for pT,ee< 0.1 GeV/c, and as a function of pT,ee in three mee intervals in the most peripheral Pb–Pb collisions. Below a pT,ee of 0.1 GeV/c, a clear excess of e+e− pairs is found compared to the expectations from known hadronic sources and predictions of thermal radiation from the medium. The mee excess spectra are reproduced, within uncertainties, by different predictions of the photon–photon production of dielectrons, where the photons originate from the extremely strong electromagnetic fields generated by the highly Lorentz-contracted Pb nuclei. Lowest-order quantum electrodynamic (QED) calculations, as well as a model that takes into account the impact-parameter dependence of the average transverse momentum of the photons, also provide a good description of the pT,ee spectra. The measured $$ \sqrt{\left\langle {p}_{\textrm{T},\textrm{ee}}^2\right\rangle } $$ p T , ee 2 of the excess pT,ee spectrum in peripheral Pb–Pb collisions is found to be comparable to the values observed previously at RHIC in a similar phase-space region.

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Le contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Dielectron production at midrapidity at low transverse momentum in peripheral and semi-peripheral Pb–Pb collisions at $$ {\sqrt{s}}_{\textrm{NN}} $$ = 5.02 TeV
Date Crossref
05/06/2023
Éditeur
Springer Science and Business Media LLC
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.

Les institutions déclarées

Variable Energy Cyclotron CentreCentre National de la Recherche ScientifiqueUniversité Clermont AuvergneHomi Bhabha National InstituteInstitut National de Physique Nucléaire et de Physique des ParticulesCzech Academy of Sciences, Nuclear Physics InstituteGoethe University FrankfurtEuropean Organization for Nuclear ResearchPolitecnico di TorinoIstituto Nazionale di Fisica Nucleare, Sezione di BolognaAligarh Muslim UniversityKorea Institute of Science & Technology InformationUniversity of Pavol Jozef ŠafárikGSI Helmholtz Centre for Heavy Ion ResearchBose InstituteIstituto Nazionale di Fisica Nucleare, Sezione di TorinoCentral China Normal UniversityUniversidad Nacional Autónoma de MéxicoAGH University of KrakowCOMSATS University IslamabadUniversity of HoustonUniversity of BergenIstituto Nazionale di Fisica Nucleare, Sezione di CagliariLyon 1 UniversitéInstitut de Physique des 2 Infinis de LyonHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringUniversity of MünsterHeidelberg UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PadovaLawrence Berkeley National LaboratoryLaboratoire de Physique Subatomique et des Technologies AssociéesIMT AtlantiqueNantes UniversitéUniversity of OsloYale UniversityLaboratoire de Physique des 2 Infinis Irène Joliot-CurieIstituto Nazionale di Fisica Nucleare, Sezione di CataniaGangneung–Wonju National UniversityIndian Institute of Technology IndoreUniversity of JammuCommissariat à l'Énergie Atomique et aux Énergies AlternativesUniversité Paris-SaclayCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversTechnical University of MunichNational and Kapodistrian University of AthensHUN-REN Wigner Research Centre for PhysicsDaresbury LaboratoryHospital Universitário da Universidade de São PauloUniversity of LiverpoolLund UniversityIndian Institute of Technology BombayPontificia Universidad Católica del PerúUniversity of CopenhagenInstitut Pluridisciplinaire Hubert CurienUniversité de StrasbourgUniversity of California, BerkeleyInstitute of Space Science - INFLPR SubsidiaryGauhati UniversityCzech Technical University in PragueInstitute of Nuclear Physics, Polish Academy of SciencesThe University of Texas at AustinFrankfurt Institute for Advanced StudiesUniversity of PaviaIstituto Nazionale di Fisica Nucleare, Sezione di PaviaOak Ridge National LaboratoryInha UniversityIstituto Nazionale di Fisica Nucleare, Sezione di BariPolytechnic University of BariStefan Meyer Institute for Subatomic PhysicsUniversity of the WitwatersrandNational Research FoundationUniversity of KansasUniversidad Autónoma de SinaloaBenemérita Universidad Autónoma de PueblaIstituto Nazionale di Fisica Nucleare, Sezione di TriesteUniversitatea Națională de Știință și Tehnologie Politehnica BucureștiUniversity of SalernoSaha Institute of Nuclear PhysicsUniversidade Estadual de Campinas (UNICAMP)National Institute for Subatomic PhysicsUniversity of TsukubaUniversity of BirminghamLaboratoire de Physique Subatomique et de CosmologieUniversité Grenoble AlpesUniversidade Federal do ABCWarsaw University of TechnologyCentro de Aplicaciones Tecnológicas y Desarrollo NuclearUniversity of Cape TownPanjab UniversityTechnical University of KošiceComenius University BratislavaUniversity of ZagrebWestern Norway University of Applied SciencesIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiUniversity of TriesteChicago State UniversityNational Nuclear Research CenterUniversidade Federal do Rio Grande do SulUniversity of Tennessee SystemUniversity of Tennessee at KnoxvilleNagasaki Institute of Applied ScienceWayne State UniversityUniversity of SplitUtrecht UniversityA. Alikhanyan National LaboratoryThe University of TokyoUniversity of BonnCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalYonsei UniversityCreighton UniversityUniversity of JyväskyläThe Ohio State UniversityUniversity of BresciaSuranaree University of TechnologySlovak Academy of SciencesInstitute of Experimental Physics of the Slovak Academy of SciencesKTO Karatay UniversityInstitute of Physics, BhubaneshwarNational Institute of Science Education and ResearchPusan National UniversityJeonbuk National UniversityCalifornia Polytechnic State UniversityNational Centre for Nuclear ResearchUniversity of South-Eastern NorwayChina Institute of Atomic EnergyFudan UniversityHelsinki Institute of PhysicsUniversity of RajasthanChungbuk National UniversityHiroshima UniversityUnited Nations University Institute for Sustainability and PeaceUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”University of MessinaUniversity of TübingenNara Women's UniversitySofia University "St. Kliment Ohridski"National Nuclear Energy Agency of IndonesiaNational Research and Innovation AgencyUniversity of Science and Technology of ChinaNational Academy of Sciences of UkraineBogolyubov Institute for Theoretical PhysicsFZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic

Une affiliation ne permet pas de déduire la nationalité d’un auteur.

Les sujets associés

High-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions

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