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dc.contributor.authorAcharya, Shreyasi
dc.contributor.authorAcosta, Fernando Torales
dc.contributor.authorAdamová, Dagmar
dc.contributor.authorAdolfsson, Jonatan
dc.contributor.authorAggarwal, Madan M.
dc.contributor.authorAglieri Rinella, Gianluca
dc.contributor.authorAgnello, Michelangelo
dc.contributor.authorAgrawal, Nikita
dc.contributor.authorAhammed, Zubayer
dc.contributor.authorAhn, Sang Un
dc.contributor.authorAlme, Johan
dc.contributor.authorAltenkaemper, Lucas
dc.contributor.authorDjuvsland, Øystein
dc.contributor.authorErsdal, Magnus Rentsch
dc.contributor.authorFionda, Fiorella Maria Celeste
dc.contributor.authorNystrand, Joakim
dc.contributor.authorRehman, Attiq ur
dc.contributor.authorRøhrich, Dieter
dc.contributor.authorTambave, Ganesh Jagannath
dc.contributor.authorUllaland, Kjetil
dc.contributor.authorWagner, Boris
dc.contributor.authorZhou, Zhuo
dc.contributor.authorArsene, Ionut Cristian
dc.contributor.authorBätzing, Paul Christoph
dc.contributor.authorDordic, Olja
dc.contributor.authorLardeux, Antoine Xavier
dc.contributor.authorLindal, Svein
dc.contributor.authorMahmood, Sohail Musa
dc.contributor.authorMalik, Qasim Waheed
dc.contributor.authorRichter, Matthias
dc.contributor.authorRøed, Ketil
dc.contributor.authorSkaali, Toralf Bernhard
dc.contributor.authorTveter, Trine Spedstad
dc.contributor.authorWikne, Jon Christopher
dc.contributor.authorZhao, Chengxin
dc.contributor.authorHelstrup, Håvard
dc.contributor.authorHetland, Kristin Fanebust
dc.contributor.authorKileng, Bjarte
dc.contributor.authorNesbø, Simon Voigt
dc.contributor.authorStoretvedt, Maksim Melnik
dc.contributor.authorLangøy, Rune
dc.contributor.authorLien, Jørgen André
dc.contributor.authorAiola, Salvatore
dc.contributor.authorAkindinov, Alexander
dc.contributor.authorAl-Turany, Mohammed
dc.contributor.authorAlam, Sk Noor
dc.contributor.authorDe Albuquerque, Danilo Silva
dc.contributor.authorAleksandrov, Dimitry
dc.contributor.authorAlessandro, Bruno
dc.contributor.authorAlfaro Molina, José Rubén
dc.contributor.authorALICE, Collaboration
dc.identifier.citationAcharya, S., Acosta, F. T., Adamová, D., Adolfsson, J., Aggarwal, M. M., Aglieri Rinella, G., . . . Zou, S. (2019). Measurement of dielectron production in central Pb-Pb collisions at √sNN=2.76TeV. Physical Review C, 99(2).nb_NO
dc.description.abstractThe first measurement of dielectron (e+e−) production in central (0–10%) Pb–Pb collisions at √sNN =2.76 TeV at the LHC is presented. The dielectron invariant-mass spectrum is compared to the expectedcontributions from hadron decays in the invariant-mass range 0 < mee < 3.5 GeV/c2. The ratio of dataand the cocktail of hadronic contributions without vacuum ρ0 is measured in the invariant-mass range0.15 < mee < 0.7 GeV/c2, where an excess of dielectrons is observed in other experiments, and its value is1.40 ± 0.28 (stat.) ± 0.08 (syst.) ± 0.27 (cocktail). The dielectron spectrum measured in the invariant massrange 0 < mee < 1 GeV/c2 is consistent with the predictions from two theoretical model calculations thatinclude thermal dielectron production from both partonic and hadronic phases with in-medium broadened ρ0meson. The fraction of direct virtual photons over inclusive virtual photons is extracted for dielectron pairs withinvariant mass 0.1 < mee < 0.3 GeV/c2 and in the transverse-momentum intervals 1 < pT,ee < 2 GeV/c and2 < pT,ee < 4 GeV/c. The measured fraction of virtual direct photons is consistent with the measurement of realdirect photons by ALICE and with the expectations from previous dielectron measurements at RHIC within theexperimental uncertainties.nb_NO
dc.publisherAmerican Physical Societynb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleMeasurement of dielectron production in central Pb-Pb collisions at √sNN=2.76 TeVnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.rights.holder© 2019 CERN, for the ALICE Collaborationnb_NO
dc.subject.nsiVDP::Kjerne- og elementærpartikkelfysikk: 431nb_NO
dc.subject.nsiVDP::Nuclear and elementary particle physics: 431nb_NO
dc.source.journalPhysical Review Cnb_NO
cristin.unitnameInstitutt for data- og realfag

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