Naslov
Multiplicity dependence of π, K, and p production in pp collisions at √s = 13 TeV

Autori
Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
European physical journal C : particles and fields (1434-6044) 80 (2020), 8; 693, 20

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
π, K, and p production ; pp collisions

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA