Lambda(+)(C) production in pb-pb collisions at root S-NN=5.02 TeV

Show simple item record The ALICE collaboration Acharya, S. Brücken, E. J. Chang, B. Hilden, T. E. Kim, D. J. Litichevskyi, V. Mieskolainen, M. M. Orava, R. Parkkila, J. E. Rak, J. Räsänen, S. S. Saarinen, S. Slupecki, M. Snellman, T. W. Trzaska, W. H. Vargyas, M. Viinikainen, J. 2019-06-25T12:18:01Z 2019-06-25T12:18:01Z 2019-06-10
dc.identifier.citation The ALICE Collaboration , Acharya , S , Brücken , E J , Chang , B , Hilden , T E , Kim , D J , Litichevskyi , V , Mieskolainen , M M , Orava , R , Parkkila , J E , Rak , J , Räsänen , S S , Saarinen , S , Slupecki , M , Snellman , T W , Trzaska , W H , Vargyas , M & Viinikainen , J 2019 , ' Lambda(+)(C) production in pb-pb collisions at root S-NN=5.02 TeV ' , Physics Letters B , vol. 793 , pp. 212-223 .
dc.identifier.other PURE: 125327801
dc.identifier.other PURE UUID: c96b6c99-1071-48d5-aa22-8571bcf35a11
dc.identifier.other WOS: 000470064800035
dc.identifier.other ORCID: /0000-0001-8893-7401/work/58958662
dc.identifier.other ORCID: /0000-0002-2574-241X/work/58958712
dc.identifier.other ORCID: /0000-0002-5822-9356/work/118751861
dc.description.abstract A measurement of the production of prompt Lambda(+)(C) baryons in Pb-Pb collisions at root S-NN = 5.02 TeV with the ALICE detector at the LHC is reported. The Lambda(+)(C) and (Lambda) over bar (-)(C) were reconstructed at midrapidity (vertical bar y vertical bar < 0.5) via the hadronic decay channel Lambda(+)(C) -> pK(S)(0) (and charge conjugate) in the transverse momentum and centrality intervals 6 < p(T) < 12 GeV/c and 0-80%. The Lambda(+)(C)/D-0 ratio, which is sensitive to the charm quark hadronisation mechanisms in the medium, is measured and found to be larger than the ratio measured in minimum-bias pp collisions at root s = 7 TeV and in p-Pb collisions at root S-NN = 5.02 TeV. In particular, the values in p-Pb and Pb-Pb collisions differ by about two standard deviations of the combined statistical and systematic uncertainties in the common P-T interval covered by the measurements in the two collision systems. The Lambda(+)(C)/D-0 ratio is also compared with model calculations including different implementations of charm quark hadronisation. The measured ratio is reproduced by models implementing a pure coalescence scenario, while adding a fragmentation contribution leads to an underestimation. The Lambda(+)(C) nuclear modification factor, R-AA, is also presented. The measured values of the R-AA of Lambda(+)(C), D-S(+) and non-strange D mesons are compatible within the combined statistical and systematic uncertainties. They show, however, a hint of a hierarchy (R-AA(D0) < R-AA(DS+) < R-AA(Lambda C+)), conceivable with a contribution from coalescence mechanisms to charm hadron formation in the medium. (C) 2019 European Organization for Nuclear Research. Published by Elsevier B.V. en
dc.format.extent 12
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 Lambda(+)(C) production in 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.issn 0370-2693
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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