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Peter Christiansen Profile

Peter Christiansen

Professor

Peter Christiansen Profile

The "shoulder" and the "ridge" in PHENIX

Author

  • M. McCumber
  • Peter Christiansen
  • Hans-Åke Gustafsson
  • Eva Haslum
  • Anders Oskarsson
  • Sarah Rosendahl
  • Evert Stenlund

Summary, in English

Comparison of two-particle correlations in heavy-ion collisions with measurements in proton collisions shows strong modification of the correlation shape and particle yields. Two new structures are created; both extended in Δη, one centered at Δ = 0 ('ridge') and the other occurring at Δ π ± 1.1 ('shoulder'). In these proceedings, we describe the measurements of these structures that show consistency with a scenario of parton–medium interaction and response. We discuss a new analysis with improved resolution in selections on the angle of trigger particles relative to the reaction plane. New measurements of the centrality and pT dependences of the structures raise the possibility that the same production mechanism may give rise to both phenomena.

Department/s

  • Particle and nuclear physics

Publishing year

2008

Language

English

Publication/Series

Journal of Physics G: Nuclear and Particle Physics

Volume

35

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0954-3899