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Production of light-flavor hadrons in pp collisions at $$\sqrt{s}~=~7\text { and }\sqrt{s} = 13 \, \text { TeV} $$статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: ALICE C., Malinina L.
- Журнал: European Physical Journal C
- Том: 81
- Номер: 3
- Год издания: 2021
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 256
- DOI: 10.1140/epjc/s10052-020-08690-5
- Аннотация: The production of π±\pi ^{\pm }π±, K±\mathrm{K}^{\pm }K±, KS0\mathrm{K}^{0}_{S}KS0, K∗(892)0\mathrm{K}^{*}(892)^{0}K∗(892)0, p\mathrm{p}p, ϕ(1020)\phi (1020)ϕ(1020), Λ\Lambda Λ, Ξ−\Xi ^{-}Ξ−, Ω−\Omega ^{-}Ω−, and their antiparticles was measured in inelastic proton–proton (pp) collisions at a center-of-mass energy of s\sqrt{s}s = 13 TeV at midrapidity (∣y∣<0.5|y|<0.5∣y∣<0.5) as a function of transverse momentum (pTp_{\mathrm{T}}pT) using the ALICE detector at the CERN LHC. Furthermore, the single-particle pTp_{\mathrm{T}}pT distributions of KS0\mathrm{K}^{0}_{S}KS0, Λ\Lambda Λ, and Λ‾\overline{\Lambda }Λ in inelastic pp collisions at s=7\sqrt{s} = 7s=7 TeV are reported here for the first time. The pTp_{\mathrm{T}}pT distributions are studied at midrapidity within the transverse momentum range 0≤pT≤200\le p_{\mathrm{T}}\le 200≤pT≤20 GeV/c, depending on the particle species. The pTp_{\mathrm{T}}pT spectra, integrated yields, and particle yield ratios are discussed as a function of collision energy and compared with measurements at lower s\sqrt{s}s and with results from various general-purpose QCD-inspired Monte Carlo models. A hardening of the spectra at high pTp_{\mathrm{T}}pT with increasing collision energy is observed, which is similar for all particle species under study. The transverse mass and xT≡2pT/sx_{\mathrm{T}}\equiv 2p_{\mathrm{T}}/\sqrt{s}xT≡2pT/s scaling properties of hadron production are also studied. As the collision energy increases from s\sqrt{s}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\sqrt{s}s, while ratios for multi-strange hadrons indicate enhancements. The pTp_\mathrm{{T}}pT-differential cross sections of π±\pi ^{\pm }π±, K±\mathrm {K}^{\pm }K± and p\mathrm {p}p (p‾\overline{\mathrm{p}}p) are compared with next-to-leading order perturbative QCD calculations, which are found to overestimate the cross sections for π±\pi ^{\pm }π± and p\mathrm{p}p (p‾\overline{\mathrm{p}}p) at high pTp_\mathrm{{T}}pT.
- Добавил в систему: Малинина Людмила Владимировна