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

doi:10.1016/j.physletb.2020.135377

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV
	Acharya, S ; Adamova, D ; Adhya, SP ; Adler, A ; Adolfsson, J ; Aggarwal, MM ; Rinella, GA ; Agnello, M ; Agrawal, N ; Ahammed, Z
刊名	PHYSICS LETTERS B
	2020
卷号	804 页码:-
关键词	RADIATIVE ENERGY-LOSS ION COLLISIONS SUPPRESSION
ISSN号	0370-2693
DOI	10.1016/j.physletb.2020.135377
文献子类	期刊论文
英文摘要	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/).
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32992]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.INFN, Sez Trieste, Trieste, Italy 2.Univ Padua, Dipartimento Fis & Astron, Padua, Italy 3.Sezione Ist Nazl Fis Nucl, Padua, Italy 4.Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy (4 5.Grp Collegato INFN, Salerno, Italy 6.Politecn Torino, Dipartimento DISAT, Turin, Italy 7.Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy 8.INFN, Sez Torino, Alessandria, Italy 9.Dipartimento Interateneo Fis M Merlin, Bari, Italy 10.Sezione Ist Nazl Fis Nucl, Bari, Italy
推荐引用方式 GB/T 7714	Acharya, S,Adamova, D,Adhya, SP,et al. Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV[J]. PHYSICS LETTERS B,2020,804:-.
APA	Acharya, S.,Adamova, D.,Adhya, SP.,Adler, A.,Adolfsson, J.,...&Zurlo, N.(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,804,-.
MLA	Acharya, S,et al."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 804(2020):-.