Universal centrality dependence of particle multiplicities in heavy-ion collisions
Starting from the light-cone plasma (LCP) distribution of gluons produced in proton-proton collisions, we derive the invariant charged-particle yield dN/dyd2p⊥ in heavy-ion collisions. Multiple scattering of partons in the other nucleus leads to p⊥ broadening, which depends on the centrality of the...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
15 May 2013
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| In: |
Physical review. C, Nuclear physics
Year: 2013, Jahrgang: 87, Heft: 5, Pages: 1-9 |
| ISSN: | 1089-490X |
| DOI: | 10.1103/PhysRevC.87.054906 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.87.054906 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.87.054906 
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| Verfasserangaben: | H.J. Pirner, K. Reygers, B.Z. Kopeliovich |
| Zusammenfassung: | Starting from the light-cone plasma (LCP) distribution of gluons produced in proton-proton collisions, we derive the invariant charged-particle yield dN/dyd2p⊥ in heavy-ion collisions. Multiple scattering of partons in the other nucleus leads to p⊥ broadening, which depends on the centrality of the collision. The resulting change of the LCP parameters determines the distributions of charged particles. The charged-particle multiplicity dN/dη at η=0 normalized to the number of participating nucleons has a universal centrality dependence, common to the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). This universal increase is of geometrical origin. Such a universality can be broken by the energy-dependent coherence effect, shadowing, and mutual boosting of the saturation scales. However, we found these effects to essentially compensate each other, leaving the centrality dependence of multiplicity approximately universal. |
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| Beschreibung: | Gesehen am 24.11.2021 |
| Beschreibung: | Online Resource |
| ISSN: | 1089-490X |
| DOI: | 10.1103/PhysRevC.87.054906 |