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Title: Recent Results from the PHENIX Experiment at RHIC: Exploring the QCD Medium

Abstract

We review some important results from the PHENIX experiment at RHIC. They were obtained in a unique environment for studying QCD bulk matter at temperatures and densities that surpass the limits where hadrons exist as individual entities, so raising to prominence the quark-gluon degrees of freedom. We present measurements of nuclear modification factors for neutral pions, light favors (strange hadrons), direct-photons and non-photonic electrons from decays of particles carrying charm or beauty quarks. We interpret the large suppression of hadron production at high transverse momenta as resulting from a large energy loss by the precursor parton on its path through the dense matter, primarily driven by gluon radiation. This dense QCD matter responds to energy loss in a pattern consistent with that expected from a hydrodynamic fluid. Further, its elliptic flow measurements suggest that the hadronization of bulk partonic matter exhibits collectivity with effective partonic degrees of freedom. The results are shown as a function of transverse momentum, centrality in different collision systems and energies.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
Sponsoring Org.:
DOE - OFFICE OF SCIENCE
OSTI Identifier:
1034079
Report Number(s):
BNL-96500-2011-JA
Journal ID: ISSN 0375-9474; R&D Project: PO 003; KB0201021; TRN: US1200739
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Nuclear Physics A
Additional Journal Information:
Journal Volume: 862-863; Journal ID: ISSN 0375-9474
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DEGREES OF FREEDOM; ELECTRONS; GLUONS; HADRONS; HYDRODYNAMICS; MODIFICATIONS; PIONS; PRECURSOR; PRODUCTION; QUANTUM CHROMODYNAMICS; QUARKS; QUENCHING; SILICON; TRANSVERSE MOMENTUM; relativistic heavy ion collider

Citation Formats

Nouicer, R., and PHENIX Collaboration. Recent Results from the PHENIX Experiment at RHIC: Exploring the QCD Medium. United States: N. p., 2011. Web. doi:10.1016/j.nuclphysa.2011.05.021.
Nouicer, R., & PHENIX Collaboration. Recent Results from the PHENIX Experiment at RHIC: Exploring the QCD Medium. United States. doi:10.1016/j.nuclphysa.2011.05.021.
Nouicer, R., and PHENIX Collaboration. Sat . "Recent Results from the PHENIX Experiment at RHIC: Exploring the QCD Medium". United States. doi:10.1016/j.nuclphysa.2011.05.021.
@article{osti_1034079,
title = {Recent Results from the PHENIX Experiment at RHIC: Exploring the QCD Medium},
author = {Nouicer, R. and PHENIX Collaboration},
abstractNote = {We review some important results from the PHENIX experiment at RHIC. They were obtained in a unique environment for studying QCD bulk matter at temperatures and densities that surpass the limits where hadrons exist as individual entities, so raising to prominence the quark-gluon degrees of freedom. We present measurements of nuclear modification factors for neutral pions, light favors (strange hadrons), direct-photons and non-photonic electrons from decays of particles carrying charm or beauty quarks. We interpret the large suppression of hadron production at high transverse momenta as resulting from a large energy loss by the precursor parton on its path through the dense matter, primarily driven by gluon radiation. This dense QCD matter responds to energy loss in a pattern consistent with that expected from a hydrodynamic fluid. Further, its elliptic flow measurements suggest that the hadronization of bulk partonic matter exhibits collectivity with effective partonic degrees of freedom. The results are shown as a function of transverse momentum, centrality in different collision systems and energies.},
doi = {10.1016/j.nuclphysa.2011.05.021},
journal = {Nuclear Physics A},
issn = {0375-9474},
number = ,
volume = 862-863,
place = {United States},
year = {2011},
month = {10}
}