dc.contributor.author | Aad, Georges | eng |
dc.contributor.author | Abbott, Brad | eng |
dc.contributor.author | Abdallah, Jalal | eng |
dc.contributor.author | Abdel Khalek, Samah | eng |
dc.contributor.author | Abdelalim, Ahmed Ali | eng |
dc.contributor.author | Abdesselam, Abdel | eng |
dc.contributor.author | Abdinov, Ovsat Bahram oglu | eng |
dc.contributor.author | Abi, Babak | eng |
dc.contributor.author | Abolins, Maris | eng |
dc.contributor.author | AbouZeid, Hass | eng |
dc.contributor.author | Buanes, Trygve | eng |
dc.contributor.author | Burgess, Thomas | eng |
dc.contributor.author | Eigen, Gerald | eng |
dc.contributor.author | Johansen, Lars Gimmestad | eng |
dc.contributor.author | Kastanas, Alex | eng |
dc.contributor.author | Liebig, Wolfgang | eng |
dc.contributor.author | Lipniacka, Anna | eng |
dc.contributor.author | Rosendahl, Peter Lundgaard | eng |
dc.contributor.author | Sandaker, Heidi | eng |
dc.contributor.author | Sjursen, Therese B. | eng |
dc.contributor.author | Stugu, Bjarne | eng |
dc.contributor.author | Tonoyan, Arshak | eng |
dc.contributor.author | Ugland, Maren | eng |
dc.contributor.author | Bugge, Lars | eng |
dc.contributor.author | Buran, Torleiv | eng |
dc.contributor.author | Cameron, David Gordon | eng |
dc.contributor.author | Czyczula, Zofia | eng |
dc.contributor.author | Gjelsten, Børge Kile | eng |
dc.contributor.author | Lund, Esben | eng |
dc.contributor.author | Ould-Saada, Farid | eng |
dc.contributor.author | Pajchel, Katarina | eng |
dc.contributor.author | Pylypchenko, Yuriy | eng |
dc.contributor.author | Read, Alexander Lincoln | eng |
dc.contributor.author | Røhne, Ole Myren | eng |
dc.contributor.author | Samset, Bjørn Hallvard | eng |
dc.contributor.author | Stapnes, Steinar | eng |
dc.contributor.author | Strandlie, Are | eng |
dc.contributor.author | Abramowicz, Halina | eng |
dc.contributor.author | Acerbi, Emilio | eng |
dc.contributor.author | Adamczyk, Leszek | eng |
dc.contributor.author | Adams, David | eng |
dc.contributor.author | Addy, Tetteh N. | eng |
dc.contributor.author | Adelman, Jareed | eng |
dc.contributor.author | Adomeit, Stefanie | eng |
dc.contributor.author | Adragna, Paolo | eng |
dc.contributor.author | Adye, Tim | eng |
dc.contributor.author | Aefsky, Scott Alan | eng |
dc.contributor.author | Aguilar Saavedra, Juan Antonio | eng |
dc.contributor.author | Aharrouche, Mohamed | eng |
dc.contributor.author | Ahlen, Steven | eng |
dc.contributor.author | ATLAS, Collaboration | eng |
dc.date.accessioned | 2015-09-22T11:28:23Z | |
dc.date.available | 2015-09-22T11:28:23Z | |
dc.date.issued | 2012-07-24 | |
dc.identifier.issn | 0556-2813 | en_US |
dc.identifier.uri | https://hdl.handle.net/1956/10493 | |
dc.description.abstract | Differential measurements of charged particle azimuthal anisotropy are presented for lead-lead collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV with the ATLAS detector at the LHC, based on an integrated luminosity of approximately 8 \(\mu b^{-1}\). This anisotropy is characterized via a Fourier expansion of the distribution of charged particles in azimuthal angle \(\phi\) , with the coefficients \(v_n\) denoting the magnitude of the anisotropy. Significant \(v_2-v_6\) values are obtained as a function of transverse momentum (0.5<pT<20 GeV), pseudorapidity (|\).eta\).<2.5) and centrality using an event plane method. The \(v_n\) values for \(n\ge3\) are found to vary weakly with both \(\eta\) and centrality, and their pT dependencies are found to follow an approximate scaling relation, \(v_n^{1/n}(pT) \propto v_2^{1/2}(pT)\). A Fourier analysis of the charged particle pair distribution in relative azimuthal angle \((\Delta\phi=\phi_a-\phi_b)\) is performed to extract the coefficients \(v_{n,n}=<cos (n \Delta\phi)>\). For pairs of charged particles with a large pseudorapidity gap \((|\Delta\eta=\eta_a-\eta_b|>2)\) and one particle with pT<3 GeV, the \(v_{2,2}-v_{6,6}\) values are found to factorize as \(v_{n,n}(pT^a,pT^b) \sim v_n(pT^a)v_n(pT^b)\) in central and mid-central events. Such factorization suggests that these values of \(v_{2,2}-v_{6,6}\) are primarily due to the response of the created matter to the fluctuations in the geometry of the initial state. A detailed study shows that the \(v_{1,1}(pT^a,pT^b)\) data are consistent with the combined contributions from a rapidity-even \(v_1\) and global momentum conservation. A two-component fit is used to extract the \(v_1\) contribution. The extracted \(v_1\) is observed to cross zero at \(pT\sim\) 1.0 GeV, reaches a maximum at 4-5 GeV with a value comparable to that for \(v_3\). and decreases at higher pT. | en_US |
dc.language.iso | eng | eng |
dc.publisher | American Physical Society | en_US |
dc.rights | Attribution CC BY | eng |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/ | eng |
dc.title | Measurement of the azimuthal anisotropy for charged particle production in \(\sqrt{s_{NN}}\) = 2.76 TeV lead-lead collisions with the ATLAS detector | en_US |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.date.updated | 2015-07-30T08:35:46Z | |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2012 CERN, for the ATLAS Collaboration | en_US |
dc.source.articlenumber | 014907 | |
dc.identifier.doi | https://doi.org/10.1103/physrevc.86.014907 | |
dc.identifier.cristin | 1194747 | |
dc.source.journal | Physical Review C. Nuclear Physics | |
dc.source.40 | 86 | |
dc.source.14 | 1 | |
dc.subject.nsi | VDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 | |
dc.subject.nsi | VDP::Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 | |