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| 題名: | Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at √s NN=2.76TeV |
| 作者: | 張元翰;Chatrchyan, S;Tumasyan, A;Frühwirth, R;Jeitler, M;Liko, D;Mucibello, L;Villella, I;Basegmez, S;Martins, T;Novaes, S F;Zou, W;Plestina, R;Kadija, K;Attikis, A;Besancon, M;Bianchini, L;Salerno, R;Sordini, V;Mankel, R;Marienfeld, M;Klanner, R;Stadie, H;Berger, J;Hartmann, F;Schilling, F-P;Manolakos, I;Sikler, F;Molnar, J;Sarkar, S;Mohanty, A K;Mazumdar, K;De Filippis, N;Braibant-Giacomelli, S;Perrotta, A;Paolucci, P;Branca, A;Simonetto, F;Santocchia, A;Ligabue, F;Marone, M;Son, D C;Kim, J Y;Brona, G;Ferreira Parracho, P G;Musella, P;Volodko, A;Bayshev, I;Uzunian, A;Aguilar-Benitez, M;Puerta Pelayo, J;Martinez Rivero, C;Giffels, M;Gomez-Reino Garrido, R;Lecoq, P;Rolandi, G;Rovere, M;Sekmen, S;Chanon, N;Nessi-Tedaldi, F;Chang, P;Bakirci, M N;Tali, B;Gülmez, E;Frazier, R;Metson, S;Coughlan, J A;Kennedy, B W;Gilbert, A;Nikitenko, A;St John, J;Tsang, K V;Vasquez Sierra, R;Cline, D;Luthra, A;Andrews, W;Lebourgeois, M;Justus, C;Wagner, S R;Kwan, S;Uplegger, L;Bourilkov, D;Hugon, J;Matchev, K;Hagopian, S;Weinberg, M;Vodopiyanov, I;Strom, D;Mestvirishvili, A;Kenny, R P;Kellogg, R G;Kim, Y;Wenger, E A;Dominguez, A;Rodenburg, M;Gerbaudo, D;Marlow, D;Leonardo, N;Hits, D;Libeiro, T;Boutle, S |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2012-07-10 |
| 上傳時間: | 2026-04-23 11:43:27 (UTC+8) |
| 摘要: | 摘要： The azimuthal anisotropy of charged particles in Pb-Pb collisions at sqrt[s(NN)]=2.76 TeV is measured with the CMS detector at the LHC over an extended transverse momentum (p(T)) range up to approximately 60 GeV/c. The data cover both the low-p(T) region associated with hydrodynamic flow phenomena and the high-p(T) region where the anisotropies may reflect the path-length dependence of parton energy loss in the created medium. The anisotropy parameter (v2) of the particles is extracted by correlating charged tracks with respect to the event-plane reconstructed by using the energy deposited in forward-angle calorimeters. For the six bins of collision centrality studied, spanning the range of 0-60% most-central events, the observed v2 values are found to first increase with p(T), reaching a maximum around p(T)=3 GeV/c, and then to gradually decrease to almost zero, with the decline persisting up to at least pp(T)=40 GeV/c over the full centrality range measured.The azimuthal anisotropy of charged particles in Pb-Pb collisions at sqrt[s(NN)]=2.76 TeV is measured with the CMS detector at the LHC over an extended transverse momentum (p(T)) range up to approximately 60 GeV/c. The data cover both the low-p(T) region associated with hydrodynamic flow phenomena and the high-p(T) region where the anisotropies may reflect the path-length dependence of parton energy loss in the created medium. The anisotropy parameter (v2) of the particles is extracted by correlating charged tracks with respect to the event-plane reconstructed by using the energy deposited in forward-angle calorimeters. For the six bins of collision centrality studied, spanning the range of 0-60% most-central events, the observed v2 values are found to first increase with p(T), reaching a maximum around p(T)=3 GeV/c, and then to gradually decrease to almost zero, with the decline persisting up to at least pp(T)=40 GeV/c over the full centrality range measured.
出版日期： 2012-07-13
出處： Physical review letters, 2012-07, Vol.109 (2), p.022301
資源來源： American Physical Society Journals
識別號： ISSN: 1079-7114
識別號： EISSN: 1079-7114
識別號： DOI: 10.1103/PhysRevLett.109.022301 |
| 顯示於類別: | [物理學系] 期刊論文
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