Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector
The ATLAS experiment at the LHC has measured the centrality dependence of charged particle pseudorapidity distributions over |η|<2 in lead-lead collisions at a nucleon-nucleon centre-of-mass energy of √s NN=2.76 TeV. In order to include particles with transverse momentum as low as 30 MeV, the...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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2012
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| _version_ | 1826281553882251264 |
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| author | Aad, G Abbott, B Abdallah, J Abdelalim, A Abdesselam, A Abdinov, O Abi, B Abolins, M Abramowicz, H Abreu, H Acerbi, E Acerbi, E Acharya, B Acharya, B Adams, D Addy, T Adelman, J Aderholz, M Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Aharrouche, M Ahlen, S |
| author_facet | Aad, G Abbott, B Abdallah, J Abdelalim, A Abdesselam, A Abdinov, O Abi, B Abolins, M Abramowicz, H Abreu, H Acerbi, E Acerbi, E Acharya, B Acharya, B Adams, D Addy, T Adelman, J Aderholz, M Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Aharrouche, M Ahlen, S |
| author_sort | Aad, G |
| collection | OXFORD |
| description | The ATLAS experiment at the LHC has measured the centrality dependence of charged particle pseudorapidity distributions over |η|<2 in lead-lead collisions at a nucleon-nucleon centre-of-mass energy of √s NN=2.76 TeV. In order to include particles with transverse momentum as low as 30 MeV, the data were recorded with the central solenoid magnet off. Charged particles were reconstructed with two algorithms (2-point "tracklets" and full tracks) using information from the pixel detector only. The lead-lead collision centrality was characterized by the total transverse energy in the forward calorimeter in the range 3.2<|η|<4.9. Measurements are presented of the per-event charged particle pseudorapidity distribution, dN ch/dη, and the average charged particle multiplicity in the pseudorapidity interval |η|<0.5 in several intervals of collision centrality. The results are compared to previous mid-rapidity measurements at the LHC and RHIC. The variation of the mid-rapidity charged particle yield per colliding nucleon pair with the number of participants is consistent with lower sNN results. The shape of the dN ch/dη distribution is found to be independent of centrality within the systematic uncertainties of the measurement. © 2012 CERN. |
| first_indexed | 2024-03-07T00:30:32Z |
| format | Journal article |
| id | oxford-uuid:7fa19211-458d-4628-b276-2dda4deed1be |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:30:32Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:7fa19211-458d-4628-b276-2dda4deed1be2022-03-26T21:18:12ZMeasurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detectorJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7fa19211-458d-4628-b276-2dda4deed1beSymplectic Elements at Oxford2012Aad, GAbbott, BAbdallah, JAbdelalim, AAbdesselam, AAbdinov, OAbi, BAbolins, MAbramowicz, HAbreu, HAcerbi, EAcerbi, EAcharya, BAcharya, BAdams, DAddy, TAdelman, JAderholz, MAdomeit, SAdragna, PAdye, TAefsky, SAguilar-Saavedra, JAharrouche, MAhlen, SThe ATLAS experiment at the LHC has measured the centrality dependence of charged particle pseudorapidity distributions over |η|<2 in lead-lead collisions at a nucleon-nucleon centre-of-mass energy of √s NN=2.76 TeV. In order to include particles with transverse momentum as low as 30 MeV, the data were recorded with the central solenoid magnet off. Charged particles were reconstructed with two algorithms (2-point "tracklets" and full tracks) using information from the pixel detector only. The lead-lead collision centrality was characterized by the total transverse energy in the forward calorimeter in the range 3.2<|η|<4.9. Measurements are presented of the per-event charged particle pseudorapidity distribution, dN ch/dη, and the average charged particle multiplicity in the pseudorapidity interval |η|<0.5 in several intervals of collision centrality. The results are compared to previous mid-rapidity measurements at the LHC and RHIC. The variation of the mid-rapidity charged particle yield per colliding nucleon pair with the number of participants is consistent with lower sNN results. The shape of the dN ch/dη distribution is found to be independent of centrality within the systematic uncertainties of the measurement. © 2012 CERN. |
| spellingShingle | Aad, G Abbott, B Abdallah, J Abdelalim, A Abdesselam, A Abdinov, O Abi, B Abolins, M Abramowicz, H Abreu, H Acerbi, E Acerbi, E Acharya, B Acharya, B Adams, D Addy, T Adelman, J Aderholz, M Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Aharrouche, M Ahlen, S Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector |
| title | Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector |
| title_full | Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector |
| title_fullStr | Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector |
| title_full_unstemmed | Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector |
| title_short | Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector |
| title_sort | measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead lead collisions at √s nn 2 76 tev with the atlas detector |
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