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Production of light-flavor hadrons in pp collisions at √s=7and√s=13TeV

The European physical journal. C, Particles and fields, 2021-03, Vol.81 (3) [Peer Reviewed Journal]

ISSN: 1434-6044 ;EISSN: 1434-6052 ;DOI: 10.1140/epjc/s10052-020-08690-5

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  • Title:
    Production of light-flavor hadrons in pp collisions at √s=7and√s=13TeV
  • Author: Acharya, S ; Adolfsson, Jonatan ; Christiansen, Peter ; Nassirpour, Adrian ; Ohlson, Alice ; Oskarsson, Anders ; Richert, Tuva ; Vazquez Rueda, Omar ; Silvermyr, David ; Stenlund, Evert ; Zurlo, N
  • Subjects: Fysik ; Natural Sciences ; Naturvetenskap ; Physical Sciences ; Subatomic Physics ; Subatomär fysik
  • Is Part Of: The European physical journal. C, Particles and fields, 2021-03, Vol.81 (3)
  • Description: The production of π±, K ±, KS0, K ∗(892) , p , ϕ(1020) , Λ , Ξ -, Ω -, and their antiparticles was measured in inelastic proton–proton (pp) collisions at a center-of-mass energy of s = 13 TeV at midrapidity (| y| < 0.5) as a function of transverse momentum (pT) using the ALICE detector at the CERN LHC. Furthermore, the single-particle pT distributions of KS0, Λ , and Λ ¯ in inelastic pp collisions at s=7 TeV are reported here for the first time. The pT distributions are studied at midrapidity within the transverse momentum range 0 ≤ pT≤ 20 GeV/c, depending on the particle species. The pT spectra, integrated yields, and particle yield ratios are discussed as a function of collision energy and compared with measurements at lower s and with results from various general-purpose QCD-inspired Monte Carlo models. A hardening of the spectra at high pT with increasing collision energy is observed, which is similar for all particle species under study. The transverse mass and xT≡2pT/s scaling properties of hadron production are also studied. As the collision energy increases from s = 7–13 TeV, the yields of non- and single-strange hadrons normalized to the pion yields remain approximately constant as a function of s, while ratios for multi-strange hadrons indicate enhancements. The pT-differential cross sections of π±, K ± and p (p ¯) are compared with next-to-leading order perturbative QCD calculations, which are found to overestimate the cross sections for π± and p (p ¯) at high pT. © 2021, CERN for the benefit of the ALICE collaboration.
  • Language: English
  • Identifier: ISSN: 1434-6044
    EISSN: 1434-6052
    DOI: 10.1140/epjc/s10052-020-08690-5
  • Source: SWEPUB Freely available online
    Springer OA刊
    ProQuest Central
    DOAJ Directory of Open Access Journals
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