The production of pi(+/-), K-+/-, K-S(0), K*(892)(0), p, phi(1020), Lambda, Xi(-), Omega(-), and their antiparticles was measured in inelastic proton-proton (pp) collisions at a center-of-mass energy of root s = 13 TeV at midrapidity (vertical bar y vertical bar < 0.5) as a function of transverse momentum (P-T) using the ALICE detector at the CERN LHC. Furthermore, the single-particle p(T) distributions of K-S(0), Lambda, and (Lambda) over bar in inelastic pp collisions at root s = 7 TeV are reported here for the first time. The p(T) distributions are studied at midrapidity within the transverse momentum range 0 <= p(T) <= 20 GeV/c, depending on the particle species. The p(T) spectra, integrated yields, and particle yield ratios are discussed as a function of collision energy and compared with measurements at lower root s and with results from various general-purpose QCD-inspired Monte Carlo models. A hardening of the spectra at high p(T) with increasing collision energy is observed, which is similar for all particle species under study. The transverse mass and x(T) 2p(T)/root s scaling properties of hadron produc- tion are also studied. As the collision energy increases from root s = 7-13 TeV, the yields of non- and single-strange hadrons normalized to the pion yields remain approximately constant as a function of root s, while ratios for multi-strange hadrons indicate enhancements. The p(T)-differential cross sections of pi(+/-), K-+/- and p ((p) over bar) are compared with next-to-leading order perturbative QCD calculations, which are found to overestimate the cross sections for pi(+/-) and p ((p) over bar) at high p(T).

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

CALIVà A;De Caro A;De Gruttola D;De Pasquale S;Virgili T;
2021-01-01

Abstract

The production of pi(+/-), K-+/-, K-S(0), K*(892)(0), p, phi(1020), Lambda, Xi(-), Omega(-), and their antiparticles was measured in inelastic proton-proton (pp) collisions at a center-of-mass energy of root s = 13 TeV at midrapidity (vertical bar y vertical bar < 0.5) as a function of transverse momentum (P-T) using the ALICE detector at the CERN LHC. Furthermore, the single-particle p(T) distributions of K-S(0), Lambda, and (Lambda) over bar in inelastic pp collisions at root s = 7 TeV are reported here for the first time. The p(T) distributions are studied at midrapidity within the transverse momentum range 0 <= p(T) <= 20 GeV/c, depending on the particle species. The p(T) spectra, integrated yields, and particle yield ratios are discussed as a function of collision energy and compared with measurements at lower root s and with results from various general-purpose QCD-inspired Monte Carlo models. A hardening of the spectra at high p(T) with increasing collision energy is observed, which is similar for all particle species under study. The transverse mass and x(T) 2p(T)/root s scaling properties of hadron produc- tion are also studied. As the collision energy increases from root s = 7-13 TeV, the yields of non- and single-strange hadrons normalized to the pion yields remain approximately constant as a function of root s, while ratios for multi-strange hadrons indicate enhancements. The p(T)-differential cross sections of pi(+/-), K-+/- and p ((p) over bar) are compared with next-to-leading order perturbative QCD calculations, which are found to overestimate the cross sections for pi(+/-) and p ((p) over bar) at high p(T).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4785140
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