This paper presents the measurements of π±, K±, p and p transverse momentum (pT) spectra as a func- tion 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-of- mass energy dependence of light-flavour particle produc- tion. The measurements reported here cover a pT range from 0.1 to 20 GeV/c and are done in the rapidity inter- val |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 mod- els 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 com- pared 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.

Multiplicity dependence of π , K, and p production in pp collisions at √s=13 TeV / Acharya, S., Adamová, D., Adler, A., Adolfsson, J., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S.U., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 80:8(2020), pp. 1-20. [10.1140/epjc/s10052-020-8125-1]

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

Cunqueiro, L.;Toppi, M.;
2020

Abstract

This paper presents the measurements of π±, K±, p and p transverse momentum (pT) spectra as a func- tion 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-of- mass energy dependence of light-flavour particle produc- tion. The measurements reported here cover a pT range from 0.1 to 20 GeV/c and are done in the rapidity inter- val |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 mod- els 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 com- pared 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.
2020
quark; gluon; plasma
01 Pubblicazione su rivista::01a Articolo in rivista
Multiplicity dependence of π , K, and p production in pp collisions at √s=13 TeV / Acharya, S., Adamová, D., Adler, A., Adolfsson, J., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S.U., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 80:8(2020), pp. 1-20. [10.1140/epjc/s10052-020-8125-1]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1469817
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