Publication
Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at $\sqrt{s_{NN}}=2.76$ TeV
| dc.contributor.author | CMS collaboration (2279 authors) | |
| dc.contributor.author | Hollar, Jonathan | |
| dc.contributor.author | Almeida, Nuno | |
| dc.contributor.author | Bargassa, Pedrame | |
| dc.contributor.author | David Tinoco Mendes, Andre | |
| dc.contributor.author | Faccioli, Pietro | |
| dc.contributor.author | Ferreira Parracho, Pedro Guilherme | |
| dc.contributor.author | Gallinaro, Michele | |
| dc.contributor.author | Musella, Pasquale | |
| dc.contributor.author | Nayak, Aruna | |
| dc.contributor.author | Pela, Joao | |
| dc.contributor.author | Ribeiro, Pedro Quinaz | |
| dc.contributor.author | Seixas, Joao | |
| dc.contributor.author | Varela, Joao | |
| dc.contributor.author | Vischia, Pietro | |
| dc.contributor.author | Lloret Iglesias, Lara | |
| dc.contributor.author | Rodrigues Antunes, Joao | |
| dc.contributor.author | Silva, Pedro | |
| dc.contributor.author | Leonardo, Nuno | |
| dc.date.accessioned | 2019-02-03T18:45:43Z | |
| dc.date.available | 2019-02-03T18:45:43Z | |
| dc.date.issued | 2012-05-30 | |
| dc.date.updated | 2019-02-03T18:45:42Z | |
| 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 (pt) and collision centrality over a broad range in relative pseudorapidity [Delta(eta)] and the full range of relative azimuthal angle [Delta(phi)]. The observed two-dimensional correlation structure in Delta(eta) and Delta(phi) is characterised by a narrow peak at (Delta(eta), Delta(phi)) approximately (0, 0) from jet-like correlations and a long-range structure that persists up to at least |Delta(eta)| = 4. An enhancement of the magnitude of the short-range jet peak is observed with increasing centrality, especially for particles of pt 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 pt approximately 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 pt of 1-3 GeV/c, as a function of the trigger particle pt up to 20 GeV/c and over the full centrality range. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Eur.Phys.J. C72 (2012) 2012; DOI 10.1140/epjc/s10052-012-2012-3 | |
| dc.identifier.uri | http://dx.doi.org/10.1140/epjc/s10052-012-2012-3 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26085 | |
| dc.language.iso | eng | |
| dc.title | Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at $\sqrt{s_{NN}}=2.76$ TeV | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |