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Title: Latest Results of Open Heavy Flavor and Quarkonia from the PHENIX Experiment at RHIC

Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1742--6588
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Volume: 779; Conference: 16th International Conference on Strangeness in Quark Matter (SQM2016); Berkeley, CA; 20160627 through 20160701
Country of Publication:
United States

Citation Formats

Nouicer R. Latest Results of Open Heavy Flavor and Quarkonia from the PHENIX Experiment at RHIC. United States: N. p., 2016. Web. doi:10.1088/1742-6596/779/1/012003.
Nouicer R. Latest Results of Open Heavy Flavor and Quarkonia from the PHENIX Experiment at RHIC. United States. doi:10.1088/1742-6596/779/1/012003.
Nouicer R. Mon . "Latest Results of Open Heavy Flavor and Quarkonia from the PHENIX Experiment at RHIC". United States. doi:10.1088/1742-6596/779/1/012003.
title = {Latest Results of Open Heavy Flavor and Quarkonia from the PHENIX Experiment at RHIC},
author = {Nouicer R.},
abstractNote = {},
doi = {10.1088/1742-6596/779/1/012003},
journal = {},
number = ,
volume = 779,
place = {United States},
year = {Mon Jun 27 00:00:00 EDT 2016},
month = {Mon Jun 27 00:00:00 EDT 2016}

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  • RHIC experiments carry out a comprehensive physics program which studies open heavy flavor and quarkonium production in relativistic heavy-ion collisions. The discovery at RHIC of large high-pT suppression and flow of electrons from heavy quarks flavors have altered our view of the hot and dense matter formed in central Au + Au collisions at √S NN = 200 GeV. These results suggest a large energy loss and flow of heavy quarks in the hot, dense matter. In recent years, the RHIC experiments upgraded the detectors; (1) PHENIX Collaboration installed silicon vertex tracker (VTX) at mid-rapidity region and forward silicon vertexmore » tracker (FVTX) at the forward rapidity region, and (2) STAR Collaboration installed the heavy flavor tracker (HFT) and the muon telescope detector (MTD) both at the mid-rapidity region. With these new upgrades, both experiments have collected large data samples. These new detectors enhance the capability of heavy flavor measurements via precision tracking. The PHENIX experiments established measurements of ψ(1S) and ψ(2S) production as a function of system size, p + p, p + Al, p + Au, and 3He + Au collisions at √S NN = 200 GeV. In p/ 3He + A collisions at forward rapidity, we observe no difference in the ψ(2S)/ψ(1S) ratio relative to p + p collisions. At backward rapidity, where the comoving particle density is higher, we find that the ψ(2S) is preferentially suppressed by a factor of two. STAR Collaboration presents the first J/ψ and Υ measurements in the di-muon decay channel in Au + Au collisions at GeV at mid-rapidity at RHIC. Here, we observe clear J/ψ RAA suppression and qualitatively well described by transport models simultaneously accounting for dissociation and regeneration processes.« less
  • Quarkonia provide a sensitive probe of the properties of the hot dense medium created in high-energy heavy-ion collisions. Hard scattering processes result in the production of heavy quark pairs that interact with the collision medium during hadronization. These in-medium interactions convey information about the fundamental properties of the medium itself and can be used to examine the modification of the QCD confining potential in the collision environment. Baseline measurements from p+p and d+Au collision systems are used to distinguish cold nuclear matter effects while measurements from heavy-ion collision systems are used to quantify in-medium effects. The PHENIX experiment has themore » capability of detecting heavy quarkonia at 1.2 < |{eta}| < 2.2 via the {mu}{sup +}{mu}{sup -} decay channel and at |{eta}| < 0.35 via the e{sup +}e{sup -} decay channel. Recent runs have resulted in the collection of a high statistics p+p data set that provides an essential baseline reference for heavy-ion measurements and allow for further critical evaluation of heavy quarkonia production mechanisms. The latest PHENIX results for the production of the J/{psi} mesons in p+p collisions are presented.« less
  • The PHENIX Experiment at the Relativistic Heavy Ion Collider has made measurements of event-by-event fluctuations in the charged particle multiplicity as a function of collision energy, centrality, collision species, and transverse momentum in several heavy ion collision systems. It is observed that the fluctuations in terms of {sigma}{sup 2}/{mu}{sup 2} exhibit a universal power-law scaling as a function of N{sub participants} that is independent of the transverse momentum range of the measurement.