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Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC

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The prompt production of the charm baryon Λ+c and the Λ+c/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at √sNN=5.02  TeV. These new measurements show a clear decrease of the Λ+c/D0 ratio with increasing transverse momentum (pT) in both collision...

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Main Authors: Acharya, Shreyasi (Author) , Angelov, Venelin (Author) , Arslandok, Mesut (Author) , Berdnikova, Anastasia (Author) , Bergmann, Luisa (Author) , Danisch, Meike (Author) , Feuillard, Victor (Author) , Glässel, Peter (Author) , Kim, Jiyoung (Author) , Kim, Minjung (Author) , Kroesen, Martin (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schmah, Alexander (Author) , Schmidt, Marten Ole (Author) , Stachel, Johanna (Author) , Stiefelmaier, Stephan (Author) , Windelband, Bernd (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 9 November 2021
In: Physical review letters
Year: 2021, Volume: 127, Issue: 20, Pages: 1-13
ISSN:1079-7114
DOI:10.1103/PhysRevLett.127.202301
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.127.202301
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.127.202301
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Author Notes:S. Acharya et al.* (ALICE Collaboration)
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Summary:The prompt production of the charm baryon Λ+c and the Λ+c/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at √sNN=5.02  TeV. These new measurements show a clear decrease of the Λ+c/D0 ratio with increasing transverse momentum (pT) in both collision systems in the range 2<pT<12  GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/π and Λ/K0S. At low pT, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e+e− and e−p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.
Item Description:Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt
Im Titel ist das Zeichen + hochgestellt
Im Titel ist der Buchstabe c tiefgestellt
Gesehen am 25.01.2022
*ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, A. Berdnikova, L. Bergmann, M.C. Danisch, V.J.G. Feulliard, P. Glässel, J. Kim, M. Kim, M. Kroesen, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, M.O. Schmidt, J. Stachel, S.F. Stiefelmaier, B. Windelband [und 986 weitere Personen]
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.127.202301

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