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Measurement of [lambda] (1520) production in pp collisions at √s=7 TeV and p-Pb collisions at √sNN=5.02 TeV

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The production of the Λ(1520) baryonic resonance has been measured at midrapidity in inelastic pp collisions at √s=7TeV and in p-Pb collisions at √sNN=5.02TeV for non-single diffractive events and in multiplicity classes. The resonance is reconstructed through its hadronic decay channel Λ(1520) pK-...

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Main Authors: Acharya, Shreyasi (Author) , Angelov, Venelin (Author) , Arslandok, Mesut (Author) , Danisch, Meike (Author) , Feuillard, Victor (Author) , Kim, Jiyoung (Author) , Kim, Minjung (Author) , Knichel, Michael Linus (Author) , Köhler, Markus Konrad (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schmah, Alexander (Author) , Schmidt, Marten Ole (Author) , Stachel, Johanna (Author) , Windelband, Bernd (Author) , Yüncü, Alperen (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 20 February 2020
In: The European physical journal. C, Particles and fields
Year: 2020, Volume: 80, Issue: 2
ISSN:1434-6052
DOI:10.1140/epjc/s10052-020-7687-2
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-020-7687-2
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Author Notes:ALICE Collaboration*
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Summary:The production of the Λ(1520) baryonic resonance has been measured at midrapidity in inelastic pp collisions at √s=7TeV and in p-Pb collisions at √sNN=5.02TeV for non-single diffractive events and in multiplicity classes. The resonance is reconstructed through its hadronic decay channel Λ(1520) pK- and the charge conjugate with the ALICE detector. The integrated yields and mean transverse momenta are calculated from the measured transverse momentum distributions in pp and p-Pb collisions. The mean transverse momenta follow mass ordering as previously observed for other hyperons in the same collision systems. A Blast-Wave function constrained by other light hadrons (π ,K, K0S, p, Λ) describes the shape of the Λ(1520) transverse momentum distribution up to 3.5GeV / c in p-Pb collisions. In the framework of this model, this observation suggests that the Λ(1520) resonance participates in the same collective radial flow as other light hadrons. The ratio of the yield of Λ(1520) to the yield of the ground state particle Λ remains constant as a function of charged-particle multiplicity, suggesting that there is no net effect of the hadronic phase in p-Pb collisions on the Λ(1520) yield.
Item Description:ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, V. J. G. Feuillard, J. Kim. M. Kim, M.L. Knichel, M.K. Köhler, N.A. Martin, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, M.O. Schmidt, J. Stachel, B. Windelband, A. Yuncu [und weitere]
Im Titel steht der Buchstabe s unter dem Wurzelsymbol
Im Titel ist "lambda" als griechischer Buchstabe dargestellt
Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt
Gesehen am 24.04.2020
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-020-7687-2

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