Multiplicity dependence of pion, K, and p production in pp collisions at s = 13 TeV
Özet
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
Koleksiyonlar
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