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Measurement of Long-Range Angular Correlation and Quadrupole Anisotropy of Pions and (Anti) Protons in Central d plus Au Collisions at root s(NN)=200 GeV
Physical Review Letters
  • Andrew Adare, University of Colorado, Boulder
  • Alan Dion, Iowa State University
  • John C. Hill, Iowa State University
  • Todd Kempel, Iowa State University
  • John G. Lajoie, Iowa State University
  • Alexandre Lebedev, Iowa State University
  • Craig Ogilvie, Iowa State University
  • H. Pei, Iowa State University
  • Marzia Rosati, Iowa State University
  • C. L. Silva, Iowa State University
  • Feng Wei
  • et al.
  • PHENIX Collaboration, PHENIX Collaboration
Document Type
Article
Publication Version
Published Version
Publication Date
5-12-2015
DOI
10.1103/PhysRevLett.114.192301
Abstract
We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers in central d + Au and minimum bias p + p collisions at root s(NN) = 200 GeV. The charged hadron is measured at midrapidity vertical bar eta vertical bar < 0.35, and the energy is measured at large rapidity (-3.7 < eta < -3.1, Au-going direction). An enhanced near-side angular correlation across vertical bar Delta eta vertical bar > 2.75 is observed in d + Au collisions. Using the event plane method applied to the Au-going energy distribution, we extract the anisotropy strength v(2) for inclusive charged hadrons at midrapidity up to p(T) = 4.5 GeV/c. We also present the measurement of v(2) for identified pi(+/-) and (anti)protons in central d + Au collisions, and observe a mass-ordering pattern similar to that seen in heavy-ion collisions. These results are compared with viscous hydrodynamic calculations and measurements from p + Pb at root s(NN) = 5.02 TeV. The magnitude of the mass ordering in d + Au is found to be smaller than that in p + Pb collisions, which may indicate smaller radial flow in lower energy d + Au collisions.
Comments

This is an article from Physical Review Letters 114 (2015): 192301, doi:10.1103/PhysRevLett.114.192301. Posted with permission.

Copyright Owner
American Physical Society
Language
en
File Format
application/pdf
Citation Information
Andrew Adare, Alan Dion, John C. Hill, Todd Kempel, et al.. "Measurement of Long-Range Angular Correlation and Quadrupole Anisotropy of Pions and (Anti) Protons in Central d plus Au Collisions at root s(NN)=200 GeV" Physical Review Letters Vol. 114 Iss. 19 (2015) p. 192301
Available at: http://works.bepress.com/craig-ogilvie/49/