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Title: Measurement of higher-order harmonic azimuthal anisotropy in PbPb collisions at sqrt{s_{NN}} = 2.76 TeV

Measurements are presented by the CMS Collaboration at the Large Hadron Collider (LHC) of the higher-order harmonic coefficients that describe the azimuthal anisotropy of charged particles emitted in sqrt(s[NN]) = 2.76 TeV PbPb collisions. Expressed in terms of the Fourier components of the azimuthal distribution, the n = 3-6 harmonic coefficients are presented for charged particles as a function of their transverse momentum (0.3 < pt < 8.0 GeV), collision centrality (0-70%), and pseudorapidity (abs(eta) < 2.0). The data are analyzed using the event plane, multiparticle cumulant, and Lee-Yang zeros methods, which provide different sensitivities to initial-state fluctuations. Taken together with earlier LHC measurements of elliptic flow (n = 2), the results on higher-order harmonic coefficients develop a more complete picture of the collective motion in high-energy heavy-ion collisions and shed light on the properties of the produced medium.
Publication Date:
OSTI Identifier:
Report Number(s):
FERMILAB-PUB-13-625-CMS; CERN-PH-EP-2013-196; CMS-HIN-11-005
Journal ID: ISSN 0556-2813; PRVCAN; ArticleNumber: 044906; arXiv eprint number arXiv:1310.8651
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review C; Journal Volume: 89; Journal Issue: 4
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CMS Collaboration
Country of Publication:
United States
Nuclear Experiment; nucl-ex; High Energy Physics; HEP; hep-ex