Measurement of Λ(1520) production in pp collisions at √ s = 7 TeV and p–Pb collisions at √ sNN = 5.02 TeV

  • Yazar/lar KARASU UYSAL, Ayben
    ALICE Collaboration
  • Yayın Türü Makale
  • Yayın Tarihi 2020
  • DOI Numarası 10.1140/epjc/s10052-020-7687-2
  • Yayıncı Springer
  • Tek Biçim Adres http://hdl.handle.net/20.500.12498/2727

The production of the Λ(1520) baryonic resonance has been measured at midrapidity in inelastic pp collisions at √ s = 7 TeV and in p–Pb collisions at √ sNN = 5.02 TeV 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, K0 S , p, Λ) describes the shape of the Λ(1520) transverse momentum distribution up to 3.5 GeV/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.

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ISSN
(dc.identifier.issn)
14346044 (ISSN)
Yayıncı
(dc.publisher)
Springer
Eser Adı
(dc.title)
Measurement of Λ(1520) production in pp collisions at √ s = 7 TeV and p–Pb collisions at √ sNN = 5.02 TeV
Özet
(dc.description.abstract)
The production of the Λ(1520) baryonic resonance has been measured at midrapidity in inelastic pp collisions at √ s = 7 TeV and in p–Pb collisions at √ sNN = 5.02 TeV 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, K0 S , p, Λ) describes the shape of the Λ(1520) transverse momentum distribution up to 3.5 GeV/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.
Yayın Tarihi
(dc.date.issued)
2020
Kayıt Giriş Tarihi
(dc.date.accessioned)
2020-08-07T12:49:31Z
Açık Erişim tarihi
(dc.date.available)
2020-08-07T12:49:31Z
Yayın Dili
(dc.language.iso)
eng
Yayın Türü
(dc.type)
Makale
Yazar/lar
(dc.contributor.author)
KARASU UYSAL, Ayben
Yazar/lar
(dc.contributor.author)
ALICE Collaboration
Tek Biçim Adres
(dc.identifier.uri)
http://hdl.handle.net/20.500.12498/2727
DOI Numarası
(dc.identifier.doi)
10.1140/epjc/s10052-020-7687-2
Atıf Dizini
(dc.source.database)
Scopus
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