Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV

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dc.contributor.author The ALICE collaboration
dc.contributor.author Acharya, S.
dc.contributor.author Brucken, E. J.
dc.contributor.author Chang, B.
dc.contributor.author Hilden, T. E.
dc.contributor.author Kim, D. J.
dc.contributor.author Krizek, F.
dc.contributor.author Litichevskyi, V.
dc.contributor.author Mieskolainen, M. M.
dc.contributor.author Orava, R.
dc.contributor.author Parkkila, J. E.
dc.contributor.author Rak, J.
dc.contributor.author Rasanen, S. S.
dc.contributor.author Rytkonen, H.
dc.contributor.author Slupecki, M.
dc.contributor.author Snellman, T. W.
dc.contributor.author Trzaska, W. H.
dc.contributor.author Vargyas, M.
dc.contributor.author Viinikainen, J.
dc.contributor.author Zhou, Z.
dc.date.accessioned 2020-11-03T08:20:00Z
dc.date.available 2020-11-03T08:20:00Z
dc.date.issued 2020-05-10
dc.identifier.citation The ALICE Collaboration , Acharya , S , Brucken , E J , Chang , B , Hilden , T E , Kim , D J , Krizek , F , Litichevskyi , V , Mieskolainen , M M , Orava , R , Parkkila , J E , Rak , J , Rasanen , S S , Rytkonen , H , Slupecki , M , Snellman , T W , Trzaska , W H , Vargyas , M , Viinikainen , J & Zhou , Z 2020 , ' Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV ' , Physics Letters B , vol. 804 , 135377 . https://doi.org/10.1016/j.physletb.2020.135377
dc.identifier.other PURE: 150352115
dc.identifier.other PURE UUID: 01080838-1cc9-4004-a3c2-7c19d602516d
dc.identifier.other WOS: 000548740300023
dc.identifier.other ORCID: /0000-0001-8893-7401/work/85521615
dc.identifier.other ORCID: /0000-0002-2574-241X/work/85521656
dc.identifier.other ORCID: /0000-0003-2530-4265/work/87353074
dc.identifier.other ORCID: /0000-0002-5822-9356/work/118751770
dc.identifier.uri http://hdl.handle.net/10138/321049
dc.description.abstract The differential invariant yield as a function of transverse momentum (p(T)) of electrons from semileptonic heavy-flavour hadron decays was measured at midrapidity in central (0-10%), semi-central (30-50%) and peripheral (60-80%) lead-lead (Pb- Pb) collisions at root s(NN) = 5.02 TeV in the p(T) intervals 0.5-26GeV/c( 0-10% and 30-50%) and 0.5-10 GeV/c (60-80%). The production cross section in proton-proton (pp) collisions at root s = 5.02 TeV was measured as well in 0.5 <pT<10GeV/c and it lies close to the upper band of perturbative QCD calculation uncertainties up to p(T) = 5 GeV/c and close to the mean value for larger p(T). The modification of the electron yield with respect to what is expected for an incoherent superposition of nucleon-nucleon collisions is evaluated by measuring the nuclear modification factor R-AA. The measurement of the R-AA in different centrality classes allows in-medium energy loss of charm and beauty quarks to be investigated. The R-AA shows a suppression with respect to unity at intermediate p(T), which increases while moving towards more central collisions. Moreover, the measured R-AA is sensitive to the modification of the parton distribution functions (PDF) in nuclei, like nuclear shadowing, which causes a suppression of the heavy-quark production at low p(T) in heavy-ion collisions at LHC. (c) 2020 Conseil Europeen pour la Recherche Nucleaire. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). en
dc.format.extent 15
dc.language.iso eng
dc.relation.ispartof Physics Letters B
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 114 Physical sciences
dc.title Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV en
dc.type Article
dc.contributor.organization Helsinki Institute of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.physletb.2020.135377
dc.relation.issn 0370-2693
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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