A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Production of light-flavor hadrons in pp collisions at √s = 7 and √s = 13 TeV (2021)
ALICE Collaboration. (2021). Production of light-flavor hadrons in pp collisions at √s = 7 and √s = 13 TeV. European Physical Journal C, 81(3), Article 256. https://doi.org/10.1140/epjc/s10052-020-08690-5
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration
Lehti tai sarja: European Physical Journal C
ISSN: 1434-6044
eISSN: 1434-6052
Julkaisuvuosi: 2021
Volyymi: 81
Lehden numero: 3
Artikkelinumero: 256
Kustantaja: Springer
Julkaisumaa: Saksa
Julkaisun kieli: englanti
DOI: https://doi.org/10.1140/epjc/s10052-020-08690-5
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/75019
Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2005.11120
Tiivistelmä
The production of π±, K±, K0S, K∗(892)0, 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 K0S, 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.
YSO-asiasanat: hiukkasfysiikka
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2021
JUFO-taso: 2