Multiplicity and transverse-momentum dependence of two- and four-particle correlations in pPb and PbPb collisions
By Cms Collaboration. 2013
153 citations recorded by the source corpus.
Measurements of two- and four-particle angular correlations for charged particles emitted in pPb collisions are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 31 inverse nanobarns, were collected during the 2013 LHC pPb run at a nucleon-nucleon center-of-mass energy of 5.02 TeV by the CMS experiment. The results are compared to 2.76 TeV semi-peripheral PbPb collision data, collected during the 2011 PbPb run, covering a similar range of particle multiplicities. The observed correlations are characterized by the near-side (abs(Delta(phi)~0) associated pair yields and the azimuthal anisotropy Fourier harmonics (v[n]). The second-order (v[2]) and third-order (v[3]) anisotropy harmonics are extracted using the two-particle azimuthal correlation technique. A four-particle correlation method is also applied to obtain the value of v[2] and further explore the multi-particle nature of the correlations. Both associated pair yields and anisotropy harmonics are studied as a function of particle multiplicity and transverse momentum. The associated pair yields, the four-particle v[2], and the v[3] become apparent at about the same multiplicity. A remarkable similarity in the v[3] signal as a function of multiplicity is observed between the pPb and PbPb systems. Predictions based on the color glass condensate and hydrodynamic models are compared to the experimental results.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/8fa07de282846d3fc49e6ac4cc8bd6d9b5c0fc59
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In Nuclear and High Energy Physics
- Cms Collaboration
- V. Koch
- Alice Collaboration
- T. Schaefer
- J. Stachel
- P. Braun-Munzinger
- M. Raidal
- Atlas Collaboration
Citations in the corpus
- Evidence for collectivity in pp collisions at the LHC (2016, methodology): “For this analysis, a very similar low-multiplicity subtraction method developed for pPb collisions [43] is employed.”
- Long-range angular correlations of pi, K and p in p-Pb collisions at root s(NN)=5.02 TeV (2013, background): “Recent measurements involving two- and fourparticle correlations [26, 27] revealed that the pT-integrated v3 in p–Pb collisions is the same as in Pb–Pb collisions at the same midrapidity multiplicity.”
- Properties of hot and dense matter from relativistic heavy ion collisions (2015, methodology): “Source: Data from [213], analysis taken from [219].”