Elliptic flow of identified hadrons in Pb-Pb collisions at √sNN=2.76 TeV
The elliptic flow coefficient (v 2) of identified particles in Pb-Pb collisions at sNN−−−√=2.76 TeV was measured with the ALICE detector at the Large Hadron Collider (LHC). The results were obtained with the Scalar Product method, a two-particle correlation technique, using a pseudo-rapidity gap of...
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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
29 June 2015
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| In: |
Journal of high energy physics
Year: 2015, Issue: 6, Pages: 1-41 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2015)190 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP06(2015)190
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| Author Notes: | the ALICE collaboraiton* |
MARC
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| 246 | 3 | 3 | |a Elliptic flow of identified hadrons in Pb-Pb collisions at square root s NN = 2.76 TeV |
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| 500 | |a Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt | ||
| 500 | |a Gesehen am 19.07.2021 | ||
| 520 | |a The elliptic flow coefficient (v 2) of identified particles in Pb-Pb collisions at sNN−−−√=2.76 TeV was measured with the ALICE detector at the Large Hadron Collider (LHC). The results were obtained with the Scalar Product method, a two-particle correlation technique, using a pseudo-rapidity gap of |Δη| > 0.9 between the identified hadron under study and the reference particles. The v 2 is reported for π ±, K±, K 0S , p+p¯¯¯, ϕ, Λ+Λ¯¯¯¯, Ξ−+Ξ¯¯¯¯+ and Ω−+Ω¯¯¯¯+ in several collision centralities. In the low transverse momentum (p T) region, p T < 3 GeV/c, v 2(p T) exhibits a particle mass dependence consistent with elliptic flow accompanied by the transverse radial expansion of the system with a common velocity field. The experimental data for π ± and the combined K± and K 0S results, are described fairly well by hydrodynamic calculations coupled to a hadronic cascade model (VISHNU) for central collisions. However, the same calculations fail to reproduce the v 2(p T) for p+p¯¯¯, ϕ, Λ+Λ¯¯¯¯ and Ξ−+Ξ¯¯¯¯+. For transverse momentum values larger than about 3 GeV/c, particles tend to group according to their type, i.e. mesons and baryons. The present measurements exhibit deviations from the number of constituent quark (NCQ) scaling at the level of ±20% for p T > 3 GeV/c. | ||
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