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

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dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, University of Jyväskylä en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, University of Jyväskylä en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, University of Jyväskylä en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, University of Jyväskylä en
dc.contributor University of Helsinki, University of Jyväskylä en
dc.contributor.author The ALICE collaboration
dc.contributor.author Acharya, S.
dc.contributor.author Brücken, E. J.
dc.contributor.author Chang, B.
dc.contributor.author Hilden, T. E.
dc.contributor.author Kim, D. J.
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 Räsänen, S. S.
dc.contributor.author Saarinen, S.
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.date.accessioned 2019-06-25T12:18:01Z
dc.date.available 2019-06-25T12:18:01Z
dc.date.issued 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 . https://doi.org/10.1016/j.physletb.2019.04.046 en
dc.identifier.issn 0370-2693
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.uri http://hdl.handle.net/10138/303454
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 en
dc.subject 114 Physical sciences en
dc.title Lambda(+)(C) production in pb-pb collisions at root S-NN=5.02 TeV en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1016/j.physletb.2019.04.046
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl

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