Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at sNN =5.02 TeV
(2016) In Physical Review Letters 116(22).- Abstract
- The pseudorapidity density of charged particles, dNch/dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of sNN=5.02 TeV. For the 5% most central collisions, we measure a value of 1943±54. The rise in dNch/dη as a function of sNN is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dNch/dη as a function of the average number of participant nucleons, Npart, calculated in a Glauber model, is compared with the previous measurement at sNN=2.76 TeV. A constant factor of about 1.2 describes the increase in dNch/dη from sNN=2.76 to 5.02 TeV for all centrality classes, within the measured range of 0%-80%... (More)
- The pseudorapidity density of charged particles, dNch/dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of sNN=5.02 TeV. For the 5% most central collisions, we measure a value of 1943±54. The rise in dNch/dη as a function of sNN is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dNch/dη as a function of the average number of participant nucleons, Npart, calculated in a Glauber model, is compared with the previous measurement at sNN=2.76 TeV. A constant factor of about 1.2 describes the increase in dNch/dη from sNN=2.76 to 5.02 TeV for all centrality classes, within the measured range of 0%-80% centrality. The results are also compared to models based on different mechanisms for particle production in nuclear collisions. © 2016 CERN. © 2016 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the »http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7489ff3b-f7f2-425c-b1f9-583bb5cb4f07
- author
- author collaboration
- organization
- publishing date
- 2016
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- High energy physics, Lead, Tellurium compounds, Charged particle multiplicities, Constant factors, Different mechanisms, Nuclear collisions, Particle production, Pb-Pb collisions, Proton proton collisions, Pseudorapidities, Charged particles
- in
- Physical Review Letters
- volume
- 116
- issue
- 22
- article number
- 222302
- publisher
- American Physical Society
- external identifiers
-
- wos:000377021200003
- scopus:84973438953
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.116.222302
- language
- English
- LU publication?
- yes
- additional info
- Cited By :13 Export Date: 27 June 2017
- id
- 7489ff3b-f7f2-425c-b1f9-583bb5cb4f07
- date added to LUP
- 2017-06-27 08:29:57
- date last changed
- 2023-07-25 13:38:27
@article{7489ff3b-f7f2-425c-b1f9-583bb5cb4f07, abstract = {{The pseudorapidity density of charged particles, dNch/dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of sNN=5.02 TeV. For the 5% most central collisions, we measure a value of 1943±54. The rise in dNch/dη as a function of sNN is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dNch/dη as a function of the average number of participant nucleons, Npart, calculated in a Glauber model, is compared with the previous measurement at sNN=2.76 TeV. A constant factor of about 1.2 describes the increase in dNch/dη from sNN=2.76 to 5.02 TeV for all centrality classes, within the measured range of 0%-80% centrality. The results are also compared to models based on different mechanisms for particle production in nuclear collisions. © 2016 CERN. © 2016 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the »http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.}}, author = {{Adam, J. and Adamova, D. and Aggarwal, M.M and Aglieri Rinella, G and Agnello, M. and Agrawal, N and Christiansen, Peter and Ljunggren, Martin and Oskarsson, Anders and Richert, Tuva and Silvermyr, David and Sogaard, Carsten and Stenlund, Evert and Vislavicius, Vytautas}}, issn = {{1079-7114}}, keywords = {{High energy physics; Lead; Tellurium compounds; Charged particle multiplicities; Constant factors; Different mechanisms; Nuclear collisions; Particle production; Pb-Pb collisions; Proton proton collisions; Pseudorapidities; Charged particles}}, language = {{eng}}, number = {{22}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at sNN =5.02 TeV}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.116.222302}}, doi = {{10.1103/PhysRevLett.116.222302}}, volume = {{116}}, year = {{2016}}, }