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EnglishIn this Letter, the ALICE Collaboration presents the first measurements of the charged-particle multiplicity density, dN(ch)/d eta, and total charged-particle multiplicity, N-ch(tot), in Xe-Xe collisions at a centre-of-mass energy per nucleon-nucleon pair of root s(NN) = 5.44 TeV. The measurements are performed as a function of collision centrality over a wide pseudorapidity range of -3.5 < eta < 5. The values of dN(ch)/d eta at mid-rapidity and N-ch(tot) for central collisions, normalised to the number of nucleons participating in the collision (N-part) as a function of root s(NN) follow the trends established in previous heavy-ion measurements. The same quantities are also found to increase as a function of N-part, and up to the 5% most central collisions the trends are the same as the ones observed in Pb-Pb at a similar energy. For more central collisions, the Xe-Xe scaled multiplicities exceed those in Pb-Pb for a similar N-part. The results are compared to phenomenological models and theoretical calculations based on different mechanisms for particle production in nuclear collisions. All considered models describe the data reasonably well within 15%.
Centrality and pseudorapidity dependence of the charged-particle multiplicity density in Xe–Xe collisions at sNN=5.44TeV / Acharya, S.; Torales-Acosta, F.; Adamova, D.; Adolfsson, J.; Aggarwal, M. M.; Agnello, M.; Bufalino, S.; Concas, M.; Grosa, F.; Ravasenga, I. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 790(2019), pp. 35-48.
| Titolo: | Centrality and pseudorapidity dependence of the charged-particle multiplicity density in Xe–Xe collisions at sNN=5.44TeV | |
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| Data di pubblicazione: | 2019 | |
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| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physletb.2018.12.048 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| published_Centrality_and_pseudorap_charged_particle_XeXe544.pdf | Centrality and pseudorapidity dependence of the charged-particle multiplicity density in Xe-Xe collisions at root s(NN)=5.44 TeV | 2a Post-print versione editoriale / Version of Record |  | Visibile a tuttiVisualizza/Apri |
| arxiv_Centrality_and_pseudorap_charged_particle_XeXe544.pdf | Centrality and pseudorapidity dependence of the charged-particle multiplicity density in Xe-Xe collisions at root s(NN)=5.44 TeV - arxiv version | 2. Post-print / Author's Accepted Manuscript | | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2743668
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