Presentation is loading. Please wait.

Presentation is loading. Please wait.

K/π and p/π Fluctuations 25 th Winter Workshop on Nuclear Dynamics February 2, 2009 Gary Westfall Michigan State University For the STAR Collaboration.

Published by Modified over 8 years ago

Similar presentations

Presentation on theme: "K/π and p/π Fluctuations 25 th Winter Workshop on Nuclear Dynamics February 2, 2009 Gary Westfall Michigan State University For the STAR Collaboration."— Presentation transcript:

1 K/π and p/π Fluctuations 25 th Winter Workshop on Nuclear Dynamics February 2, 2009 Gary Westfall Michigan State University For the STAR Collaboration

2 Gary Westfall for STAR 2 Outline Introduction Search for QCD phase transition Search for QCD critical point Observables Event-by-event fluctuations K/π Fluctuations Strangeness fluctuations p/π Fluctuations Baryon fluctuations Conclusions

3 Gary Westfall for STAR 3 Search for QCD Transition If we pass through a QCD phase transition we expect a change in the number of degrees of freedom and a change in particle number fluctuations Hadronic matter to deconfined quark gluon matter If we pass near the QCD critical point we expect an increase in susceptibilities and corresponding increase in fluctuations According to Volker Koch at QM 08 “Any fluctuation will do….” We will look for changes in K/π and p/π fluctuations as a function of beam energy

4 Gary Westfall for STAR 4 Lattice QCD Calculations Cheng et al., arXiv:0811.1006v2 [hep-th] Quadratic and quartic fluctuations of baryon number, electric charge and strangeness All quantities have been normalized to the corresponding free quark gas values

5 Gary Westfall for STAR 5 NA49 uses the variable  dyn Measure deviation from Poisson behavior using dyn Actually Characterize Fluctuations

6 Gary Westfall for STAR 6 K/π Fluctuations

7 Gary Westfall for STAR 7 Excitation Function for σ dyn,Kπ Compare STAR results for central Au+Au collisions with SPS results for central Pb+Pb collisions STAR Collaboration, arXiv:0901.1795v1 [nucl-ex] (2009) NA49 Collaboration arXiv:0808.1237v2 [nucl-ex] (2008)

8 Gary Westfall for STAR 8 Compare with Statistical Hadronization Model G. Torrieri, Int. Jour. Mod. Phys. E, 16, 1783 (2007).

9 Gary Westfall for STAR 9 Compare with Several Models AMPT Z. W. Lin, C. M. Ko, B. A. Li, B. Zhang, and S. Pal, Phys. Rev. C 72, 064901 (2005). UrQMD M. Bleicher et al., J. Phys. G 25, 1859 (1999). HSD M.I. Gorenstein, M. Hauer, V.P. Konchakovski, and E.L. Bratkovskaya, arXiv:0811.3089v1 [nucl-th] (2008). Lines are to guide the eye

10 Gary Westfall for STAR 10 ν dyn,Kπ Plotted versus dN/dη Au+Au Pb+Pb 0 - 3.5%

11 Gary Westfall for STAR 11 Look at Charges Separately 200 GeV Au+Au

12 Gary Westfall for STAR 12 HIJING Predictions - Separated Charges 200 GeV Au+Au

13 Gary Westfall for STAR 13 Scale with dN/dη and Compare with HIJING Average ν dyn,K+/π+ and ν dyn,K-/π- to get Same Average ν dyn,K+/π- and ν dyn,K-/π+ to get Opposite

14 Gary Westfall for STAR 14 Scale with dN/dη and Compare with AMPT AMPT (version 1.21, hard scattering) for summed charges is better than HIJING, but centrality dependence is not correct AMPT predicts no difference between same and opposite

15 Gary Westfall for STAR 15 Relation of K/π Fluctuations to Resonance Re-interaction Model of Torrieri, Jeon and Rafelski Predict K/π fluctuations and resonance production using statistical hadronization model www.gsi.de/documents/DOC-2007-Jul-101-1.pdf Jeon and Koch, PRL 83, 5435 (1999) (π + /π - ) Relate ν dyn,K+/π- and ν dyn,K-/π- to K * (892)/K ratio (3/4) (ν dyn,K+/π- - ν dyn,K-/π- ) ∼ K * /K

16 Gary Westfall for STAR 16 Resonance Reinteraction Compared with Thermal Model of Torrieri Au+Au T = 170 MeV

17 Gary Westfall for STAR 17 Dependence on Acceptance Full Acceptance Au+Au 200 GeV

18 Gary Westfall for STAR 18 p/π Fluctuations

19 Gary Westfall for STAR 19 Excitation Function for σ dyn,pπ 0 - 3.5% Pb+Pb 0 - 5% Au+Au

20 Gary Westfall for STAR 20 Compare with Two Models

21 Gary Westfall for STAR 21 p/  Fluctuations (ν dyn,pπ ) for 200 GeV Au+Au Compared to Mixed Events Pions 0.2 < p t < 0.6 GeV/c Protons 0.4 < p t < 1.0 GeV/c Compare with mixed events Mixed events are consistent with zero

22 Gary Westfall for STAR 22 p/  Fluctuations for 200 GeV Au+Au Scale with dN/d 

23 Gary Westfall for STAR 23 p/  Fluctuations for 200 GeV Au+Au HIJING Predictions

24 Gary Westfall for STAR 24 Conclusions It is not clear if there are any discontinuities in the excitation function for K/π fluctuations K/π fluctuations scale with dN/dη The excitation functions for K/π and p/π fluctuations in central collisions need More data RHIC low energy run Better data STAR ToF upgrade Separated sign fluctuations have more information than the summed sign fluctuations Fluctuations of resonance products - recombination, etc.

Download ppt "K/π and p/π Fluctuations 25 th Winter Workshop on Nuclear Dynamics February 2, 2009 Gary Westfall Michigan State University For the STAR Collaboration."

Similar presentations

PID v2 and v4 from Au+Au Collisions at √sNN = 200 GeV at RHIC

PID v2 and v4 from Au+Au Collisions at √sNN = 200 GeV at RHIC
Mass, Quark-number, Energy Dependence of v 2 and v 4 in Relativistic Nucleus- Nucleus Collisions Yan Lu University of Science and Technology of China Many.

Mass, Quark-number, Energy Dependence of v 2 and v 4 in Relativistic Nucleus- Nucleus Collisions Yan Lu University of Science and Technology of China Many.
Physics Results of the NA49 exp. on Nucleus – Nucleus Collisions at SPS Energies P. Christakoglou, A. Petridis, M. Vassiliou Athens University HEP2006,

Physics Results of the NA49 exp. on Nucleus – Nucleus Collisions at SPS Energies P. Christakoglou, A. Petridis, M. Vassiliou Athens University HEP2006,
Fluctuations and Correlations of Conserved Charges in QCD Thermodynamics Wei-jie Fu, ITP, CAS 16 Nov. 2010 AdS/CFT and Novel Approaches to Hadron and Heavy.

Fluctuations and Correlations of Conserved Charges in QCD Thermodynamics Wei-jie Fu, ITP, CAS 16 Nov AdS/CFT and Novel Approaches to Hadron and Heavy.
Marcus Bleicher, Florence 2006 Longitudinal Flow and Onset of Deconfinement Marcus Bleicher Institut für Theoretische Physik Goethe Universität Frankfurt.

Marcus Bleicher, Florence 2006 Longitudinal Flow and Onset of Deconfinement Marcus Bleicher Institut für Theoretische Physik Goethe Universität Frankfurt.
A probe for hot & dense nuclear matter. Lake Louise Winter Institute 21 February, 2000 Manuel Calderón de la Barca Sánchez.

A probe for hot & dense nuclear matter. Lake Louise Winter Institute 21 February, 2000 Manuel Calderón de la Barca Sánchez.
DNP03, Tucson, Oct 29, 2003 1 Kai Schweda Lawrence Berkeley National Laboratory for the STAR collaboration Hadron Yields, Hadrochemistry, and Hadronization.

DNP03, Tucson, Oct 29, Kai Schweda Lawrence Berkeley National Laboratory for the STAR collaboration Hadron Yields, Hadrochemistry, and Hadronization.
Forward-Backward Correlations in Heavy Ion Collisions Aaron Swindell, Morehouse College REU Cyclotron 2006, Texas A&M University Advisor: Dr. Che-Ming.

Forward-Backward Correlations in Heavy Ion Collisions Aaron Swindell, Morehouse College REU Cyclotron 2006, Texas A&M University Advisor: Dr. Che-Ming.
1 26th Winter Workshop, Ocho Rios, Jamaica January 2010 Christina Markert University of Texas at Austin Introduction Resonances in Medium Resonances from.

1 26th Winter Workshop, Ocho Rios, Jamaica January 2010 Christina Markert University of Texas at Austin Introduction Resonances in Medium Resonances from.
P.Seyboth: Indications for the onset of deconfinement in Pb+Pb collisions at the CERN SPS from NA49 (ISMD2004) 1 Indications for the Onset of Deconfinement.

P.Seyboth: Indications for the onset of deconfinement in Pb+Pb collisions at the CERN SPS from NA49 (ISMD2004) 1 Indications for the Onset of Deconfinement.
- How can Net-Charge Fluctuations be used as a signal of a Quark- Gluon Plasma (QGP) phase transition? - Definition of a simple fluctuation measure, some.

- How can Net-Charge Fluctuations be used as a signal of a Quark- Gluon Plasma (QGP) phase transition? - Definition of a simple fluctuation measure, some.
Nu XuInternational Conference on Strangeness in Quark Matter, UCLA, March 26 - 31, 20061/20 Search for Partonic EoS in High-Energy Nuclear Collisions Nu.

Nu XuInternational Conference on Strangeness in Quark Matter, UCLA, March , 20061/20 Search for Partonic EoS in High-Energy Nuclear Collisions Nu.
Experimental Results for Fluctuations And Correlations as a Signature of QCD Phase Transitions in Heavy Ion Collisions Gary Westfall Michigan State University,

Experimental Results for Fluctuations And Correlations as a Signature of QCD Phase Transitions in Heavy Ion Collisions Gary Westfall Michigan State University,
Jana Bielcikova (Yale University) for the STAR Collaboration 23 rd Winter Workshop on Nuclear Dynamics February 12-18, 2007 Two-particle correlations with.

Jana Bielcikova (Yale University) for the STAR Collaboration 23 rd Winter Workshop on Nuclear Dynamics February 12-18, 2007 Two-particle correlations with.
5-12 April 2008 Winter Workshop on Nuclear Dynamics STAR Particle production at RHIC Aneta Iordanova for the STAR collaboration.

5-12 April 2008 Winter Workshop on Nuclear Dynamics STAR Particle production at RHIC Aneta Iordanova for the STAR collaboration.
Helen Caines Yale University SQM – L.A.– March 2006 Using strange hadron yields as probes of dense matter. Outline Can we use thermal models to describe.

Helen Caines Yale University SQM – L.A.– March 2006 Using strange hadron yields as probes of dense matter. Outline Can we use thermal models to describe.
Supriya Das SQM 2006, 26th March 2006, UCLA 1 Event By Event Fluctuation in K/  ratio atRHIC Supriya Das § VECC, Kolkata (for STAR Collaboration) § Present.

Supriya Das SQM 2006, 26th March 2006, UCLA 1 Event By Event Fluctuation in K/  ratio atRHIC Supriya Das § VECC, Kolkata (for STAR Collaboration) § Present.
Marcus Bleicher, Santiago de Compostela 2006 Particle number fluctuations and correlation Marcus Bleicher Institut für Theoretische Physik Goethe Universität.

Marcus Bleicher, Santiago de Compostela 2006 Particle number fluctuations and correlation Marcus Bleicher Institut für Theoretische Physik Goethe Universität.
1 Statistical Models and STAR’s Strange Data Sevil Salur Yale University for the STAR Collaboration.

1 Statistical Models and STAR’s Strange Data Sevil Salur Yale University for the STAR Collaboration.
High p T identified charged hadron v 2 and v 4 in 200GeV AuAu collisions by the PHENIX experiment Shengli Huang Vanderbilt University for the PHENIX Collaboration.

High p T identified charged hadron v 2 and v 4 in 200GeV AuAu collisions by the PHENIX experiment Shengli Huang Vanderbilt University for the PHENIX Collaboration.

Similar presentations

Ads by Google