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First measurement of Λ+c production down to pT = 0 in pp and p-Pb collisions at √sNN = 5.02 TeV

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The production of prompt Λ+c baryons has been measured at midrapidity in the transverse momentum interval 0<pT<1 GeV/c for the first time, in pp and p-Pb collisions at a center-of-mass energy per nucleon-nucleon collision √sNN=5.02TeV. The measurement was performed in the decay channel Λ+c→pK0...

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Hauptverfasser: Acharya, Shreyasi (VerfasserIn) , Angelov, Venelin (VerfasserIn) , Berdnikova, Anastasia (VerfasserIn) , Bergmann, Luisa (VerfasserIn) , Bórquez Cárcamo, Andrés G. (VerfasserIn) , Crkovská, Jana (VerfasserIn) , Danisch, Meike (VerfasserIn) , Feuillard, Victor (VerfasserIn) , Fokin, Ilya D. (VerfasserIn) , Glässel, Peter (VerfasserIn) , Kroesen, Martin (VerfasserIn) , López, Jorge (VerfasserIn) , Nath, Abhishek (VerfasserIn) , Pachmayer, Yvonne C. (VerfasserIn) , Reygers, Klaus (VerfasserIn) , Schicker, Rainer (VerfasserIn) , Schmah, Alexander (VerfasserIn) , Skorodumovs, Georgijs (VerfasserIn) , Stachel, Johanna (VerfasserIn) , Stiefelmaier, Stephan (VerfasserIn) , Veen, Casper Arie van (VerfasserIn) , Völkl, Martin (VerfasserIn) , Windelband, Bernd (VerfasserIn) , Yüncü, Alperen (VerfasserIn) , Zanone, Federica (VerfasserIn)
Körperschaft: ALICE (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 29 June 2023
In: Physical review
Year: 2023, Jahrgang: 107, Heft: 6, Pages: 1-19
ISSN:2469-9993
DOI:10.1103/PhysRevC.107.064901
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.107.064901
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.107.064901
Volltext
Verfasserangaben:S. Acharya et al. (ALICE Collaboration)
Beschreibung
Zusammenfassung:The production of prompt Λ+c baryons has been measured at midrapidity in the transverse momentum interval 0<pT<1 GeV/c for the first time, in pp and p-Pb collisions at a center-of-mass energy per nucleon-nucleon collision √sNN=5.02TeV. The measurement was performed in the decay channel Λ+c→pK0S by applying new decay reconstruction techniques using a Kalman-Filter vertexing algorithm and adopting a machine-learning approach for the candidate selection. The pT-integrated Λ+c production cross sections in both collision systems were determined and used along with the measured yields in Pb-Pb collisions to compute the pT-integrated nuclear modification factors RpPb and RAA of Λ+c baryons, which are compared to model calculations that consider nuclear modification of the parton distribution functions. The Λ+c/D0 baryon-to-meson yield ratio is reported for pp and p-Pb collisions. Comparisons with models that include modified hadronization processes are presented, and the implications of the results on the understanding of charm hadronization in hadronic collisions are discussed. A significant (3.7σ) modification of the mean transverse momentum of Λ+c baryons is seen in p-Pb collisions with respect to pp collisions, while the pT-integrated Λ+c/D0 yield ratio was found to be consistent between the two collision systems within the uncertainties.
Beschreibung:Im Text ist "+" hochgestellt, "c" und "T" tiefgestellt
Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt
Veröffentlicht am 5. Juni 2023; korrigiert am 29. Juni 2023
S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, A.G. Borquez Carcamo, J. Crkovská, M.C. Danisch, V.J.G. Feuillard, I. Fokin, P. Glässel, M. Kroesen, J.A. Lopez, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, C.A. van Veen, M.A. Völkl, B. Windelband, A. Yuncu, F. Zanone [und viele weitere]
Gesehen am 27.10.2023
Beschreibung:Online Resource
ISSN:2469-9993
DOI:10.1103/PhysRevC.107.064901

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