Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 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 2019-06-25T12:11:02Z
dc.date.available 2019-06-25T12:11:02Z
dc.date.issued 2019-07-10
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 , ' Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 TeV ' , Physics Letters B , vol. 794 , pp. 50-63 . https://doi.org/10.1016/j.physletb.2019.05.028 en
dc.identifier.issn 0370-2693
dc.identifier.other PURE: 125327638
dc.identifier.other PURE UUID: 2895691c-a45e-403f-88dc-de8568d4565d
dc.identifier.other WOS: 000470065300009
dc.identifier.other ORCID: /0000-0001-8893-7401/work/58958664
dc.identifier.other ORCID: /0000-0002-2574-241X/work/58958714
dc.identifier.uri http://hdl.handle.net/10138/303452
dc.description.abstract In this letter, the production of deuterons and anti-deuterons in pp collisions at root s = 7 TeV is studied as a function of the charged-particle multiplicity density at mid-rapidity with the ALICE detector at the LHC. Production yields are measured at mid-rapidity in five multiplicity classes and as a function of the deuteron transverse momentum (p(T)). The measurements are discussed in the context of hadron-coalescence models. The coalescence parameter B-2, extracted from the measured spectra of (anti-)deuteronsand primary (anti-)protons, exhibits no significant p(T)-dependence for p(T) < 3 GeV/c, in agreement with the expectations of a simple coalescence picture. At fixed transverse momentum per nucleon, the B-2 parameter is found to decrease smoothly from low multiplicity pp to Pb-Pb collisions, in qualitative agreement with more elaborate coalescence models. The measured mean transverse momentum of (anti-)deuterons in pp is not reproduced by the Blast-Wave model calculations that simultaneously describe pion, kaon and proton spectra, in contrast to central Pb-Pb collisions. The ratio between the p(T)-integrated yield of deuterons to protons, d/p, is found to increase with the charged-particle multiplicity, as observed in inelastic pp collisions at different centre-of-mass energies. The d/p ratios are reported in a wide range, from the lowest to the highest multiplicity values measured in pp collisions at the LHC. (C) 2019 The Author(s). Published by Elsevier B.V en
dc.format.extent 14
dc.language.iso eng
dc.relation.ispartof Physics Letters B
dc.rights en
dc.subject 114 Physical sciences en
dc.subject DEUTERON PRODUCTION en
dc.subject PROTON en
dc.subject PARTICLES en
dc.subject SPECTRA en
dc.subject SEARCH en
dc.title Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 TeV en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1016/j.physletb.2019.05.028
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl

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