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

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


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OKM-raportointi: Kyllä

Alustava JUFO-taso: 2


Viimeisin päivitys 2021-09-06 klo 19:42