Probing parton dynamics of QCD matter with Ω and Φ production

Adamczyk, L.

doi:10.1103/PhysRevC.93.021903

Title: Probing parton dynamics of QCD matter with $Ω$ and $Φ$ production

Abstract

We present measurements of Ω and φ production at midrapidity from Au+Au collisions at nucleon-nucleon center-of-mass energies sNN=7.7, 11.5, 19.6, 27, and 39 GeV by the STAR experiment at the BNL Relativistic Heavy Ion Collider (RHIC). Motivated by the coalescence formation mechanism for these strange hadrons, we study the ratios of N(Ω-+Ω#x0002B;)/[2N(φ)]. These ratios as a function of transverse momentum pT fall on a consistent trend at high collision energies, but start to show deviations in peripheral collisions at sNN=19.6, 27, and 39 GeV, and in central collisions at 11.5 GeV in the intermediate pT region of 2.4-3.6 GeV/c. We further evaluate empirically the strange quark pT distributions at hadronization by studying the Ω/φ ratios scaled by the number of constituent quarks (NCQ). The NCQ-scaled Ω/φ ratios show a suppression of strange quark production in central collisions at 11.5 GeV compared to sNN≥19.6 GeV. The shapes of the presumably thermal strange quark distributions in 0-60% most central collisions at 7.7 GeV show significant deviations from those in 0-10% most central collisions at higher energies. These features suggest that there is likely a change of the underlying strange quark dynamics in the transition from quark matter to hadronic matter at collisionmore » energies below 19.6 GeV.« less

Authors:

Adamczyk, L. ^[1]

AGH University of Science and Technology, FPACS, Cracow (Poland). et al.

Publication Date:: Wed Feb 24 00:00:00 EST 2016

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Org.:: STAR Collaboration

OSTI Identifier:: 1340354

Alternate Identifier(s):: OSTI ID: 1239435; OSTI ID: 1459366

Report Number(s):: BNL-112090-2016-JA
Journal ID: ISSN 2469-9985; PRVCAN; R&D Project: PO 004; KB0202012

Grant/Contract Number:: SC00112704; AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 93; Journal Issue: 2; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Relativistic Heavy Ion Collider

Citation Formats


                    Adamczyk, L. Probing parton dynamics of QCD matter with Ω and Φ production.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevC.93.021903.

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                    Adamczyk, L. Probing parton dynamics of QCD matter with Ω and Φ production.  United States.  https://doi.org/10.1103/PhysRevC.93.021903

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                    Adamczyk, L. Wed .  
"Probing parton dynamics of QCD matter with Ω and Φ production".  United States.  https://doi.org/10.1103/PhysRevC.93.021903.  https://www.osti.gov/servlets/purl/1340354.

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@article{osti_1340354,

  title        = {Probing parton dynamics of QCD matter with Ω and Φ production},

  author       = {Adamczyk, L.},

  abstractNote = {We present measurements of Ω and φ production at midrapidity from Au+Au collisions at nucleon-nucleon center-of-mass energies sNN=7.7, 11.5, 19.6, 27, and 39 GeV by the STAR experiment at the BNL Relativistic Heavy Ion Collider (RHIC). Motivated by the coalescence formation mechanism for these strange hadrons, we study the ratios of N(Ω-+Ω#x0002B;)/[2N(φ)]. These ratios as a function of transverse momentum pT fall on a consistent trend at high collision energies, but start to show deviations in peripheral collisions at sNN=19.6, 27, and 39 GeV, and in central collisions at 11.5 GeV in the intermediate pT region of 2.4-3.6 GeV/c. We further evaluate empirically the strange quark pT distributions at hadronization by studying the Ω/φ ratios scaled by the number of constituent quarks (NCQ). The NCQ-scaled Ω/φ ratios show a suppression of strange quark production in central collisions at 11.5 GeV compared to sNN≥19.6 GeV. The shapes of the presumably thermal strange quark distributions in 0-60% most central collisions at 7.7 GeV show significant deviations from those in 0-10% most central collisions at higher energies. These features suggest that there is likely a change of the underlying strange quark dynamics in the transition from quark matter to hadronic matter at collision energies below 19.6 GeV.},

  doi          = {10.1103/PhysRevC.93.021903},

  journal      = {Physical Review C},

  number       = 2,

  volume       = 93,

  place        = {United States},

  year         = {Wed Feb 24 00:00:00 EST 2016},

  month        = {Wed Feb 24 00:00:00 EST 2016}

}

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FIG. 1: (Color online) Mid-rapidity (|y| < 0.5) $\phi$ meson p_T spectra from Au+Au collisions at different centralities and energies ($\sqrt{sNN}$ = 7.7 - 39 GeV). The green bands represent systematic errors. The dashed curves represent fits to the experimental data with a Levy function [10].

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Squeezed back-to-back correlations of bosons with nonzero widths in relativistic heavy-ion collisions
text, January 2019

Xu, Peng-Zhi; Zhang, Wei-Ning
arXiv
DOI: 10.48550/arxiv.1904.04974

Nucleon-number scalings of anisotropic flows and nuclear modification factor for light nuclei in the squeeze-out region
text, January 2020

Wang, T. T.; Ma, Y. G.
arXiv
DOI: 10.48550/arxiv.2002.06067

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Title: Probing parton dynamics of QCD matter with Ω and Φ production

Abstract

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Figures / Tables:

Energy dependence of ϕ meson production in central Pb + Pb collisions at s NN = 6 to 17 GeV journal, October 2008

Particle-Type Dependence of Azimuthal Anisotropy and Nuclear Modification of Particle Production in A u + A u Collisions at s N N = 200 G e V journal, February 2004

Energy dependence of the v 2 -scaling and the QCD phase boundary journal, August 2010

Breaking of the number-of-constituent-quark scaling for identified-particle elliptic flow as a signal of phase change in low-energy data taken at the BNL Relativistic Heavy Ion Collider (RHIC) journal, June 2009

Critical points in the linear σ model with quarks journal, January 2009

Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase journal, October 2003

QCD Phase Diagram and the Critical Point journal, January 2004

Production of strange particles at intermediate p T in central Au+Au collisions at high energies journal, May 2007

STAR detector overview journal, March 2003

Inclusive distributions for hadronic collisions in the valon-recombination model journal, August 2002

Canonical partition function and finite density phase transition in lattice QCD journal, October 2008

Observation of an Energy-Dependent Difference in Elliptic Flow between Particles and Antiparticles in Relativistic Heavy Ion Collisions journal, April 2013

Ω − and Ω ¯ + Production in Central Pb + Pb collisions at 40 and 158 A GeV journal, May 2005

Parton distributions at hadronization from bulk dense matter produced in Au + Au collisions at s NN = 200 GeV journal, September 2008

K S 0 and Λ Production in Pb-Pb Collisions at s N N = 2.76 TeV journal, November 2013

Probe of the QCD phase diagram with φ-mesons in high-energy nuclear collisions journal, May 2009

Elliptic Flow at Large Transverse Momenta from Quark Coalescence journal, August 2003

Mass ordering of differential elliptic flow and its violation for ϕ mesons journal, April 2008

Strangeness Production in the Quark-Gluon Plasma journal, April 1982

Multistrange Baryon Production in Au-Au Collisions at s N N = 130 GeV journal, May 2004

Energy and system size dependence of chemical freeze-out in relativistic nuclear collisions journal, April 2006

Identified Baryon and Meson Distributions at Large Transverse Momenta from Au + Au Collisions at s N N = 200 GeV journal, October 2006

Elliptic flow of identified hadrons in Au+Au collisions at s NN = 7.7 –62.4 GeV journal, July 2013

Critical point of QCD at finite T and , lattice results for physical quark masses journal, April 2004

Measurements of ϕ meson production in relativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC) journal, June 2009

Parton Coalescence and the Antiproton/Pion Anomaly at RHIC journal, May 2003

Elliptic flow of ϕ mesons as a sensitive probe for the onset of the deconfinement transition in high energy heavy-ion collisions journal, January 2013

Hadronization in Heavy-Ion Collisions: Recombination and Fragmentation of Partons journal, May 2003

Strangeness in relativistic heavy ion collisions journal, September 1986

Evidence of Early Multistrange Hadron Freeze-Out in High Energy Nuclear Collisions journal, December 1998

Scaling Properties of Hyperon Production in Au + Au Collisions at s N N = 200 GeV journal, February 2007

Comparison of chemical freeze-out criteria in heavy-ion collisions journal, March 2006

Partonic Flow and ϕ -Meson Production in Au + Au Collisions at s N N = 200 GeV journal, September 2007

Partonic coalescence in relativistic heavy ion collisions journal, September 2003

Strange particle production in 158 and 40 A GeV/ c Pb–Pb and p-Be collisions journal, March 2005

Strangeness Enhancement in Cu-Cu and Au-Au Collisions at s N N = 200 GeV journal, February 2012

Inclusive charged hadron elliptic flow in Au + Au collisions at s N N = 7.7 –39 GeV journal, November 2012

φ -Meson Production as a Probe of the Quark-Gluon Plasma journal, March 1985

The order of the quantum chromodynamics transition predicted by the standard model of particle physics journal, October 2006

Single identified hadron spectra from s N N = 130 GeV Au + Au collisions journal, February 2004

Hadron production in central nucleus–nucleus collisions at chemical freeze-out journal, June 2006

Ω and ϕ production in Au + Au collisions at $$\sqrt{s_{_\mathrm{NN}}} = 11.5$$ s NN = 11.5 and 7.7 GeV in a dynamical quark coalescence model journal, March 2018

Squeezed back-to-back correlations of bosons with nonzero widths in relativistic heavy-ion collisions journal, July 2019

Nucleon-number scalings of anisotropic flows and nuclear modification factor for light nuclei in the squeeze-out region journal, June 2019

Hard-Core Radius of Nucleons within the Induced Surface Tension Approach journal, February 2019

Hard-core Radius of Nucleons within the Induced Surface Tension Approach text, January 2018

Squeezed back-to-back correlations of bosons with nonzero widths in relativistic heavy-ion collisions text, January 2019

Nucleon-number scalings of anisotropic flows and nuclear modification factor for light nuclei in the squeeze-out region text, January 2020

Title: Probing parton dynamics of QCD matter with $Ω$ and $Φ$ production

Energy dependence of $ϕ$ meson production in central $Pb + Pb$ collisions at $\sqrt{s_{NN}} = 6$ to 17 GeV
journal, October 2008

Particle-Type Dependence of Azimuthal Anisotropy and Nuclear Modification of Particle Production in $A u + A u$ Collisions at $\sqrt{s_{N N}} = 200 G e V$
journal, February 2004

Energy dependence of the v ₂ -scaling and the QCD phase boundary
journal, August 2010

Breaking of the number-of-constituent-quark scaling for identified-particle elliptic flow as a signal of phase change in low-energy data taken at the BNL Relativistic Heavy Ion Collider (RHIC)
journal, June 2009

Critical points in the linear σ model with quarks
journal, January 2009

Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase
journal, October 2003

QCD Phase Diagram and the Critical Point
journal, January 2004

Production of strange particles at intermediate $p_{T}$ in central Au+Au collisions at high energies
journal, May 2007

STAR detector overview
journal, March 2003

Inclusive distributions for hadronic collisions in the valon-recombination model
journal, August 2002

Canonical partition function and finite density phase transition in lattice QCD
journal, October 2008

Observation of an Energy-Dependent Difference in Elliptic Flow between Particles and Antiparticles in Relativistic Heavy Ion Collisions
journal, April 2013

$Ω^{-}$ and ${\bar{Ω}}^{+}$ Production in Central $Pb + Pb$ collisions at 40 and $158 A GeV$
journal, May 2005

Parton distributions at hadronization from bulk dense matter produced in $Au + Au$ collisions at $\sqrt{s_{NN}} = 200$ GeV
journal, September 2008

$K_{S}^{0}$ and $Λ$ Production in Pb-Pb Collisions at $\sqrt{s_{N N}} = 2.76 TeV$
journal, November 2013

Probe of the QCD phase diagram with φ-mesons in high-energy nuclear collisions
journal, May 2009

Elliptic Flow at Large Transverse Momenta from Quark Coalescence
journal, August 2003

Mass ordering of differential elliptic flow and its violation for ϕ mesons
journal, April 2008

Strangeness Production in the Quark-Gluon Plasma
journal, April 1982

Multistrange Baryon Production in Au-Au Collisions at $\sqrt{s_{N N}} = 130 GeV$
journal, May 2004

Energy and system size dependence of chemical freeze-out in relativistic nuclear collisions
journal, April 2006

Identified Baryon and Meson Distributions at Large Transverse Momenta from $Au + Au$ Collisions at $\sqrt{s_{N N}} = 200 GeV$
journal, October 2006

Elliptic flow of identified hadrons in Au+Au collisions at $\sqrt{s_{NN}} = 7.7$ –62.4 GeV
journal, July 2013

Critical point of QCD at finite T and , lattice results for physical quark masses
journal, April 2004

Measurements of $ϕ$ meson production in relativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC)
journal, June 2009

Parton Coalescence and the Antiproton/Pion Anomaly at RHIC
journal, May 2003

Elliptic flow of $ϕ$ mesons as a sensitive probe for the onset of the deconfinement transition in high energy heavy-ion collisions
journal, January 2013

Hadronization in Heavy-Ion Collisions: Recombination and Fragmentation of Partons
journal, May 2003

Strangeness in relativistic heavy ion collisions
journal, September 1986

Evidence of Early Multistrange Hadron Freeze-Out in High Energy Nuclear Collisions
journal, December 1998

Scaling Properties of Hyperon Production in $Au + Au$ Collisions at $\sqrt{s_{N N}} = 200 GeV$
journal, February 2007

Comparison of chemical freeze-out criteria in heavy-ion collisions
journal, March 2006

Partonic Flow and $ϕ$ -Meson Production in $Au + Au$ Collisions at $\sqrt{s_{N N}} = 200 GeV$
journal, September 2007

Partonic coalescence in relativistic heavy ion collisions
journal, September 2003

Strange particle production in 158 and 40 A GeV/ c Pb–Pb and p-Be collisions
journal, March 2005

Strangeness Enhancement in Cu-Cu and Au-Au Collisions at $\sqrt{s_{N N}} = 200 GeV$
journal, February 2012

Inclusive charged hadron elliptic flow in Au $+$ Au collisions at $\sqrt{s_{N N}} = 7.7$ –39 GeV
journal, November 2012

$φ$ -Meson Production as a Probe of the Quark-Gluon Plasma
journal, March 1985

The order of the quantum chromodynamics transition predicted by the standard model of particle physics
journal, October 2006

Single identified hadron spectra from $\sqrt{s_{N N}} = 130 GeV$ $Au + Au$ collisions
journal, February 2004

Hadron production in central nucleus–nucleus collisions at chemical freeze-out
journal, June 2006

Ω and ϕ production in Au + Au collisions at $$\sqrt{s_{_\mathrm{NN}}} = 11.5$$ s NN = 11.5 and 7.7 GeV in a dynamical quark coalescence model
journal, March 2018

Squeezed back-to-back correlations of bosons with nonzero widths in relativistic heavy-ion collisions
journal, July 2019

Nucleon-number scalings of anisotropic flows and nuclear modification factor for light nuclei in the squeeze-out region
journal, June 2019

Hard-Core Radius of Nucleons within the Induced Surface Tension Approach
journal, February 2019

Hard-core Radius of Nucleons within the Induced Surface Tension Approach
text, January 2018

Squeezed back-to-back correlations of bosons with nonzero widths in relativistic heavy-ion collisions
text, January 2019

Nucleon-number scalings of anisotropic flows and nuclear modification factor for light nuclei in the squeeze-out region
text, January 2020