Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at √sNN=2.76 TeV
| dc.citation.issueNumber | 2012 | |
| dc.citation.journalTitle | The European Physical Journal C | |
| dc.citation.volumeNumber | 72 | |
| dc.contributor.author | CMS Collaboration | |
| dc.date.accessioned | 2015-07-17T17:32:39Z | |
| dc.date.available | 2015-07-17T17:32:39Z | |
| dc.date.issued | 2012 | |
| dc.description.abstract | Measurements from the CMS experiment at the LHC of dihadron correlations for charged particles produced in PbPb collisions at a nucleon–nucleon centre-of-mass energy of 2.76 TeV are presented. The results are reported as a function of the particle transverse momenta (p T) and collision centrality over a broad range in relative pseudorapidity (Δη) and the full range of relative azimuthal angle (Δϕ). The observed two-dimensional correlation structure in Δη and Δϕ is characterised by a narrow peak at (Δη,Δϕ)≈(0,0) from jet-like correlations and a long-range structure that persists up to at least |Δη|=4. An enhancement of the magnitude of the short-range jet peak is observed with increasing centrality, especially for particles of p T around 1–2 GeV/c. The long-range azimuthal dihadron correlations are extensively studied using a Fourier decomposition analysis. The extracted Fourier coefficients are found to factorise into a product of single-particle azimuthal anisotropies up to p T≈3–3.5 GeV/c for at least one particle from each pair, except for the second-order harmonics in the most central PbPb events. Various orders of the single-particle azimuthal anisotropy harmonics are extracted for associated particle p T of 1–3 GeV/c, as a function of the trigger particle p T up to 20 GeV/c and over the full centrality range. | |
| dc.identifier.citation | CMS Collaboration. "Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at √sNN=2.76 TeV." <i>The European Physical Journal C,</i> 72, no. 2012 (2012) Springer: http://dx.doi.org/10.1140/epjc/s10052-012-2012-3. | |
| dc.identifier.doi | http://dx.doi.org/10.1140/epjc/s10052-012-2012-3 | |
| dc.identifier.uri | https://hdl.handle.net/1911/81044 | |
| dc.language.iso | eng | |
| dc.publisher | Springer | |
| dc.rights | This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. | |
| dc.rights.uri | http://creativecommons.org/licenses/by/3.0/ | |
| dc.title | Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at √sNN=2.76 TeV | |
| dc.type | Journal article | |
| dc.type.dcmi | Text | |
| dc.type.publication | publisher version |
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