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dc.contributor.authorAcharya, Shreyasi
dc.contributor.authorAcosta, Fernando T.
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
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.date.accessioned2019-05-28T07:00:14Z
dc.date.available2019-05-28T07:00:14Z
dc.date.created2019-04-04T13:42:11Z
dc.date.issued2019
dc.identifier.citationPhysics Letters B. 2019, 788, 505-518.nb_NO
dc.identifier.issn0370-2693
dc.identifier.urihttp://hdl.handle.net/11250/2599105
dc.descriptionPublished by Elsevier B.V. This is an open access article under the CC BY licensenb_NO
dc.description.abstractThe measurement of dielectron production is presented as a function of invariant mass and transverse momentum (pT) at midrapidity (|ye| <0.8) in proton–proton (pp) collisions at a centre-of-mass energy of √s=13TeV. The contributions from light-hadron decays are calculated from their measured cross ections in pp collisions at √s=7TeV or 13TeV. The remaining continuum stems from correlated semileptonic decays of heavy-flavour hadrons. Fitting the data with templates from two different MC event generators, PYTHIA and POWHEG, the charm and beauty cross sections at midrapidity are extracted for the first time at this collision energy: dσc¯ c/dy|y=0=974 ±138 (stat.) ±140 (syst.) ±214(BR)μband dσb¯ b/dy|y=0=79 ±14 (stat.) ±11 (syst.) ±5(BR)μbusing PYTHIA simulations and dσc¯ c/dy|y=0=1417 ±184 (stat.) ±204 (syst.) ±312(BR)μband dσb¯ b/dy|y=0=48 ±14 (stat.) ±7 (syst.) ±3(BR)μbfor POWHEG. These values, whose uncertainties are fully correlated between the two generators, are consistent with extrapolations from lower energies. The different results obtained with POWHEG and PYTHIA imply different kinematic correlations of the heavy-quark pairs in these two generators. Furthermore, comparisons of dielectron spectra in inelastic events and in events collected with a trigger on high charged-particle multiplicities are presented in various pTintervals. The differences are consistent with the already measured scaling of light-hadron and open-charm production at high charged-particle multiplicity as a function of pT. Upper limits for the contribution of virtual direct photons are extracted at 90% confidence level and found to be in agreement with pQCD calculations.nb_NO
dc.description.sponsorshipSCOAPnb_NO
dc.language.isoengnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleDielectron and heavy-quark production in inelastic and high-multiplicity proton–proton collisions at √s=13 TeVnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.rights.holder©2018 The Author.nb_NO
dc.subject.nsiVDP::Kjerne- og elementærpartikkelfysikk: 431nb_NO
dc.subject.nsiVDP::Nuclear and elementary particle physics: 431nb_NO
dc.source.pagenumber505-518nb_NO
dc.source.volume788nb_NO
dc.source.journalPhysics Letters Bnb_NO
dc.identifier.doi10.1016/j.physletb.2018.11.009
dc.identifier.cristin1690249
cristin.unitcode222,58,4,0
cristin.unitnameInstitutt for mikrosystemer
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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