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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Limiting fragmentation as an initial-state probe in heavy ion collisions

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Goncalves, Kayman J. [1] ; Giannini, V, Andre ; Chinellato, David D. [1] ; Torrieri, Giorgio [1]
Total Authors: 4
[1] Univ Estadual Campinas, IFGW, Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Physical Review C; v. 100, n. 5 NOV 4 2019.
Web of Science Citations: 0

We discuss limiting fragmentation within a few currently popular phenomenological models. We show that popular Glauber-inspired models of particle production in heavy ion collisions, such as the two-component model, generally fail to reproduce limiting fragmentation when all energies and system sizes experimentally available are considered. This is due to the energy dependence of number of participants and number of collisions. We quantify this violation in terms of the model parameters. We also make the same calculation within a color glass condensate scenario and show that the dependence of the saturation scale on the number of participants generally leads to violation of limiting fragmentation. We further argue that wounded parton models, provided the nucleon size and parton density vary predominantly with Bjorken x, could in principle reproduce both multiplicity dependence with energy and limiting fragmentation. We suggest, therefore, that an experimental measurement of deviation from limiting fragmentation in heavy ion collisions, for different system sizes and including the experimentally available range of energies, is a powerful test of initial-state models. (AU)

FAPESP's process: 18/23677-0 - Early-time dynamics of hadronic collisions beyond the Gaussian approximation of the Color Glass Condensate
Grantee:André Veiga Giannini
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 17/14974-8 - Phenomenology of relativistic heavy-ion collisions: QCD under extreme conditions
Grantee:André Veiga Giannini
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/05685-2 - Hadronic physics in high energy nuclear collisions
Grantee:Jun Takahashi
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/06508-7 - Development of hydrodynamics as a field theory
Grantee:Donato Giorgio Torrieri
Support type: Regular Research Grants