Multiplicity dependence of π, K, and p production in pp collisions at √ s = 13 TeV
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2020Autor
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Abstract
This paper presents the measurements of π ±, K±, p and p transverse momentum (pT) spectra as a function of charged-particle multiplicity density in proton–proton (pp) collisions at √ s = 13 TeV with the ALICE detector at the LHC. Such study allows us to isolate the center-ofmass energy dependence of light-flavour particle production. The measurements reported here cover a pT range from 0.1 to 20 GeV/c and are done in the rapidity interval |y| < 0.5. The pT-differential particle ratios exhibit a ...
This paper presents the measurements of π ±, K±, p and p transverse momentum (pT) spectra as a function of charged-particle multiplicity density in proton–proton (pp) collisions at √ s = 13 TeV with the ALICE detector at the LHC. Such study allows us to isolate the center-ofmass energy dependence of light-flavour particle production. The measurements reported here cover a pT range from 0.1 to 20 GeV/c and are done in the rapidity interval |y| < 0.5. The pT-differential particle ratios exhibit an evolution with multiplicity, similar to that observed in pp collisions at √ s = 7 TeV, which is qualitatively described by some of the hydrodynamical and pQCD-inspired models discussed in this paper. Furthermore, the pT-integrated hadron-to-pion yield ratios measured in pp collisions at two different center-of-mass energies are consistent when compared at similar multiplicities. This also extends to strange and multi-strange hadrons, suggesting that, at LHC energies, particle hadrochemistry scales with particle multiplicity the same way under different collision energies and colliding systems. ...
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The European physical journal. C, Particles and fields. Berlin. Vol. 80, no. 8 (Aug. 2020), 693, 20 p.
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Artigos de Periódicos (39559)Ciências Exatas e da Terra (6036)
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