Elliptic flow of identified hadrons in Pb-Pb collisions at root(NN)-N-s=2.76 Tev
(2015) In Journal of High Energy Physics- Abstract
- The elliptic flow coefficient (v(2)) of identified particles in Pb-Pb collisions at root s(NN) = 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 |Delta eta| > 0.9 between the identified hadron under study and the reference particles. The v (2) is reported for pi(+/-), K-+/-, K-S(0), p+(p) over bar, phi, Lambda+(Lambda) over bar, Xi+(Xi) over bar (+) and Omega(-)+(Omega) over bar (+) 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... (More)
- The elliptic flow coefficient (v(2)) of identified particles in Pb-Pb collisions at root s(NN) = 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 |Delta eta| > 0.9 between the identified hadron under study and the reference particles. The v (2) is reported for pi(+/-), K-+/-, K-S(0), p+(p) over bar, phi, Lambda+(Lambda) over bar, Xi+(Xi) over bar (+) and Omega(-)+(Omega) over bar (+) 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 pi (+/-) and the combined K-+/- and K-S(0) 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) over bar, phi, Lambda+(Lambda) over bar, Xi+(Xi) over bar (+). 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. (Less)
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https://lup.lub.lu.se/record/7789451
- author
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Collective flow, Heavy Ions, Particle correlations and fluctuations
- in
- Journal of High Energy Physics
- issue
- 6
- article number
- 190
- publisher
- Springer
- external identifiers
-
- wos:000357725800001
- scopus:84937566359
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP06(2015)190
- language
- English
- LU publication?
- yes
- id
- 542656c5-fa92-4100-9909-fd4d43007d3e (old id 7789451)
- date added to LUP
- 2016-04-01 10:54:52
- date last changed
- 2023-01-02 17:00:54
@article{542656c5-fa92-4100-9909-fd4d43007d3e, abstract = {{The elliptic flow coefficient (v(2)) of identified particles in Pb-Pb collisions at root s(NN) = 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 |Delta eta| > 0.9 between the identified hadron under study and the reference particles. The v (2) is reported for pi(+/-), K-+/-, K-S(0), p+(p) over bar, phi, Lambda+(Lambda) over bar, Xi+(Xi) over bar (+) and Omega(-)+(Omega) over bar (+) 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 pi (+/-) and the combined K-+/- and K-S(0) 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) over bar, phi, Lambda+(Lambda) over bar, Xi+(Xi) over bar (+). 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.}}, author = {{Abelev, B. and Adam, J. and Adamova, D. and Aggarwal, M. M. and Agnello, M. and Agostinelli, A. and Agrawal, N. and Ahammed, Z. and Ahmad, N. and Ahmed, I. and Ahn, S. U. and Ahn, S. A. and Aimo, I. and Aiola, S. and Ajaz, M. and Akindinov, A. and Alam, S. 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K. and Gianotti, P. and Giubellino, P. and Gladysz-Dziadus, E. and Glaessel, P. and Ramirez, A. Gomez and Gonzalez-Zamora, P. and Gorbunov, S. and Goerlich, L. and Gotovac, S. and Graczykowski, L. K. and Grelli, A. and Grigoras, A. and Grigoras, C. and Grigoriev, V. and Grigoryan, A. and Grigoryan, S. and Grinyov, B. and Grion, N. and Grosse-Oetringhaus, J. F. and Grossiord, J. -Y. and Grosso, R. and Guber, F. and Guernane, R. and Guerzoni, B. and Guilbaud, M. and Gulbrandsen, K. and Gulkanyan, H. and Gumbo, M. and Gunji, T. and Gupta, A. and Gupta, R. and Khan, K. H. and Haake, R. and Haaland, O. and Hadjidakis, C. and Haiduc, M. and Hamagaki, H. and Hamar, G. and Hanratty, L. D. and Hansen, A. and Harris, J. W. and Hartmann, H. and Harton, A. and Hatzifotiadou, D. and Hayashi, S. and Heckel, S. T. and Heide, M. and Helstrup, H. and Herghelegiu, A. and Herrera Corral, G. and Hess, B. A. and Hetland, K. F. and Hippolyte, B. and Hladky, J. and Hristov, P. and Huang, M. and Humanic, T. 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B. and Zinovjev, G. and Zoccarato, Y. and Zyzak, M.}}, issn = {{1029-8479}}, keywords = {{Collective flow; Heavy Ions; Particle correlations and fluctuations}}, language = {{eng}}, number = {{6}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{Elliptic flow of identified hadrons in Pb-Pb collisions at root(NN)-N-s=2.76 Tev}}, url = {{http://dx.doi.org/10.1007/JHEP06(2015)190}}, doi = {{10.1007/JHEP06(2015)190}}, year = {{2015}}, }