Skip to main content
profile image
Selected Works of Craig Ogilvie
Article
Beam-energy and centrality dependence of direct-photon emission from ultra-relativistic heavy-ion collisions
arXiv
  • A. Adare, University of Colorado, Boulder
  • Nicole J. Apadula, Iowa State University and Stony Brook University
  • Sergey Belikov, Iowa State University and Brookhaven National Laboratory
  • Paul Constantin, Iowa State University and Los Alamos National Laboratory
  • Lei Ding, Iowa State University
  • Alan Dion, Iowa State University and Stony Brook University
  • Nathan C. Grau, Iowa State University, Augustana University, and Columbia University
  • John C. Hill, Iowa State University
  • Nels J. Hotvedt, Iowa State University
  • Todd Kempel, Iowa State University
  • John G. Lajoie, Iowa State University
  • Alexandre Lebedev, Iowa State University
  • S. H. Lee, Iowa State University and Stony Brook University
  • Craig Ogilvie, Iowa State University
  • Milap R. Patel, Iowa State University
  • H. Pei, Iowa State University
  • Jan Rak, Iowa State University, Helsinki Institute of Physics and University of Jyvaskyla, and University of New Mexico
  • Timothy T. Rinn, Iowa State University
  • Marzia Rosati, Iowa State University
  • Jonathan C. Runchey, Iowa State University
  • Alexey Yu. Semenov, Iowa State University
  • Abhisek Sen, Iowa State University and Georgia State University
  • M. Shimomura, Iowa State University, Nara Women's University, and University of Tsukuba
  • C. L. Silva, Iowa State University, Los Alamos National Laboratory, and Universidade de Sao Paulo
  • S. Skutnik, Iowa State University
  • Carla Vale, Iowa State University and Brookhaven National Laboratory
  • Feng Wei, Iowa State University and New Mexico State University
  • et al.
  • PHENIX Collaboration, PHENIX Collaboration
Download
Document Type
Article
Disciplines
Publication Version
Submitted Manuscript
Publication Date
1-1-2019
Abstract

The PHENIX collaboration presents first measurements of low-momentum (0.41\,GeV/c) direct-photon yield dNdirγ/dη is a smooth function of dNch/dη and can be well described as proportional to (dNch/dη)α with α≈1.25. This scaling behavior holds for a wide range of beam energies at the Relativistic Heavy Ion Collider and the Large Hadron Collider, for centrality selected samples, as well as for different, A+A collision systems. At a given beam energy the scaling also holds for high pT (>5\,GeV/c) but when results from different collision energies are compared, an additional sNN−−−√-dependent multiplicative factor is needed to describe the integrated-direct-photon yield.

Comments

This is a pre-print of the article Adare, A., S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba et al. "Beam-energy and centrality dependence of direct-photon emission from ultra-relativistic heavy-ion collisions." arXiv preprint arXiv:1805.04084v2 (2019). Posted with permission.

Copyright Owner
The Authors
Copyright Date
2019
Language
en
File Format
application/pdf
Citation Information
A. Adare, Nicole J. Apadula, Sergey Belikov, Paul Constantin, et al.. "Beam-energy and centrality dependence of direct-photon emission from ultra-relativistic heavy-ion collisions" arXiv (2019)
Available at: http://works.bepress.com/craig-ogilvie/303/