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

Acharya, S ; Adolfsson, Jonatan LU ; Christiansen, Peter LU ; Nassirpour, Adrian LU orcid ; Ohlson, Alice LU ; Oskarsson, Anders LU ; Richert, Tuva LU ; Vazquez Rueda, Omar LU ; Silvermyr, David LU orcid and Stenlund, Evert LU , et al. (2021) In European Physical Journal C 81(3).
Abstract
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... (More)
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. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
81
issue
3
article number
256
publisher
Springer
external identifiers
  • scopus:85103353960
ISSN
1434-6044
DOI
10.1140/epjc/s10052-020-08690-5
language
English
LU publication?
yes
id
1399e741-bf58-4a0e-8319-e673ce043c5c
date added to LUP
2021-04-08 09:50:27
date last changed
2023-04-02 06:25:39
@article{1399e741-bf58-4a0e-8319-e673ce043c5c,
  abstract     = {{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| &lt; 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.}},
  author       = {{Acharya, S and Adolfsson, Jonatan and Christiansen, Peter and Nassirpour, Adrian and Ohlson, Alice and Oskarsson, Anders and Richert, Tuva and Vazquez Rueda, Omar and Silvermyr, David and Stenlund, Evert and Zurlo, N}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  number       = {{3}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C}},
  title        = {{Production of light-flavor hadrons in pp collisions at √s=7and√s=13TeV}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-020-08690-5}},
  doi          = {{10.1140/epjc/s10052-020-08690-5}},
  volume       = {{81}},
  year         = {{2021}},
}