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Measurement of Ds+ production and nuclear modification factor in Pb-Pb collisions at √sNN=2.76 TeV

The production of prompt Ds+mesons was measured for the first time in collisions of heavy nuclei with the ALICE detector at the LHC. The analysis was performed on a data sample of Pb-Pb collisions at a centre-of-mass energy per nucleon pair, sNN$$ \sqrt{s_{\mathrm{NN}}} $$, of 2.76 TeV in two differ...

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Main Authors: Adam, Jaroslav (Author) , Angelov, Venelin (Author) , Bock, Friederike (Author) , Busch, Oliver (Author) , Deisting, Alexander (Author) , Fleck, Martin (Author) , Glässel, Peter (Author) , Karayan, Lilit (Author) , Klein, Jochen (Author) , Klewin, Sebastian (Author) , Knichel, Michael Linus (Author) , Leardini, Lucia (Author) , Mercado Pérez, Jorge (Author) , Oeschler, Helmut (Author) , Oyama, Ken (Author) , Pachmayer, Yvonne C. (Author) , Reidt, Felix (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Stachel, Johanna (Author) , Stiller, Johannes Hendrik (Author) , Völkl, Martin (Author) , Weiser, Dennis (Author) , Wilkinson, Jeremy (Author) , Windelband, Bernd (Author) , Winn, Michael (Author) , Zimmermann, Alice (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: March 14, 2016
In: Journal of high energy physics
Year: 2016, Issue: 3
ISSN:1029-8479
DOI:10.1007/JHEP03(2016)082
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP03(2016)082
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Author Notes:The ALICE Collaboration
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Summary:The production of prompt Ds+mesons was measured for the first time in collisions of heavy nuclei with the ALICE detector at the LHC. The analysis was performed on a data sample of Pb-Pb collisions at a centre-of-mass energy per nucleon pair, sNN$$ \sqrt{s_{\mathrm{NN}}} $$, of 2.76 TeV in two different centrality classes, namely 0-10% and 20-50%. Ds+mesons and their antiparticles were reconstructed at mid-rapidity from their hadronic decay channel Ds+ → ϕπ+, with ϕ → K−K+, in the transverse momentum intervals 4 < pT < 12GeV/c and 6 < pT < 12 GeV/c for the 0-10% and 20-50% centrality classes, respectively. The nuclear modification factor RAA was computed by comparing the pT-differential production yields in Pb-Pb collisions to those in proton-proton (pp) collisions at the same energy. This pp reference was obtained using the cross section measured at s=7$$ \sqrt{s}=7 $$TeV and scaled to s=2.76$$ \sqrt{s}=2.76 $$TeV. The RAA of Ds+mesons was compared to that of non-strange D mesons in the 10% most central Pb-Pb collisions. At high pT (8 < pT < 12 GeV/c) a suppression of the Ds+-meson yield by a factor of about three, compatible within uncertainties with that of non-strange D mesons, is observed. At lower pT (4 < pT < 8 GeV/c) the values of the Ds+-meson RAA are larger than those of non-strange D mesons, although compatible within uncertainties. The production ratios Ds+/D0 and Ds+/D+ were also measured in Pb-Pb collisions and compared to their values in proton-proton collisions.
Item Description:Im Titel ist "s" tiefgestellt und "+" hochgestellt
Im Titel ist "NN" nach s tiefgestellt, der ganze Ausdruck "s NN" steht unter dem Wurzelsymbol
ALICE collaboration: J. Adam, V. Anguelov, F. Bock, O. Busch, A. Deisting, M.G. Fleck, P. Glässel, L. Karayan, J. Klein, S. Klewin, M.L. Knichel, L. Leardini, J. Mercado Pérez, H. Oeschler, K. Oyama, Y. Pachmayer, F. Reidt, K. Reygers, R. Schicker, J. Stachel, J.H. Stiller, M.A. Völkl, D.F.Weiser, J. Wilkinson, B. Windelband, M. Winn, A. Zimmermann [und 955 weitere]
Gesehen am 30.07.2020
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP03(2016)082

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