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



Acharya, S, Acosta, FT, Adam, J, Adamova, D, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N
et al (show 1017 more authors) (2021) Production of light-flavor hadrons in pp collisions at √s=7 and √s=13 Tev EUROPEAN PHYSICAL JOURNAL C, 81 (3). 256-. ISSN 1434-6044, 1434-6052

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Abstract

The production of π<sup>±</sup>, K <sup>±</sup>, KS0, K <sup>∗</sup>(892) , p , ϕ(1020) , Λ , Ξ <sup>-</sup>, Ω <sup>-</sup>, 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 (p<inf>T</inf>) using the ALICE detector at the CERN LHC. Furthermore, the single-particle p<inf>T</inf> distributions of KS0, Λ , and Λ ¯ in inelastic pp collisions at s=7 TeV are reported here for the first time. The p<inf>T</inf> distributions are studied at midrapidity within the transverse momentum range 0 ≤ p<inf>T</inf>≤ 20 GeV/c, depending on the particle species. The p<inf>T</inf> 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 p<inf>T</inf> 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 p<inf>T</inf>-differential cross sections of π<sup>±</sup>, K <sup>±</sup> and p (p ¯) are compared with next-to-leading order perturbative QCD calculations, which are found to overestimate the cross sections for π<sup>±</sup> and p (p ¯) at high p<inf>T</inf>.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 17 Dec 2021 13:38
Last Modified: 16 Jun 2026 08:04
DOI: 10.1140/epjc/s10052-020-08690-5
Open Access URL: https://link.springer.com/article/10.1140%2Fepjc%2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3145571
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