Presentation is loading. Please wait.

Presentation is loading. Please wait.

Zi-Wei LinCollective flow and QGP properties11/19/2003 ● Why x-t correlation may be important for HBT ● Origin of a large&positive x-t correlation: partonic?

Published byAdrian Stewart Modified over 8 years ago

Similar presentations

Presentation on theme: "Zi-Wei LinCollective flow and QGP properties11/19/2003 ● Why x-t correlation may be important for HBT ● Origin of a large&positive x-t correlation: partonic?"— Presentation transcript:

1 Zi-Wei LinCollective flow and QGP properties11/19/2003 ● Why x-t correlation may be important for HBT ● Origin of a large&positive x-t correlation: partonic? resonance decays? hadronic rescatterings? ● Can a (hydro-type) negative x-t correlation survive decays/rescatterings in a transport model? Rout/Rside: from Gaussian fit vs from emission function Strong and positive x-t correlation and its effect on Rout/Rside Zi-Wei Lin The Ohio State University

2 Zi-Wei LinCollective flow and QGP properties11/19/2003 HBT Radii from Emission function S(x,p) or correlation function C(q) If source is Gaussian in space-time, then: Rsource,ij=Rfit,ij 1) Curvature at q=0: 2) Often use 4-parameter fit for C(q) w/o Coulomb effects: Pratt,PRL84 Wiedemann,PRC57 Dx,y= -. 2

3 Zi-Wei LinCollective flow and QGP properties11/19/2003 Study HBT with a transport model Advantage: freezeout in transport is natural as the mean free path grows too big compared with system size How to relate to hydro calculations (Cooper-Frye formula at a sharp hypersurface is usually imposed)

4 Zi-Wei LinCollective flow and QGP properties11/19/2003 HIJING energy in strings and minijet partons ZPC (Zhang's Parton Cascade) Till Parton freezeout ART (A Relativistic Transport model for hadrons) A+A Decay all resonances; Final particle spectra Structure of AMPT model with String Melting Fragment excited strings into partons Coalescence into hadrons

5 Zi-Wei LinCollective flow and QGP properties11/19/2003 ZWL,Ko&Pal,PRL89 From Gaussian fits to 3-d correlation function C(q) Au+Au at 130AGeV (b=0 fm)

6 Zi-Wei LinCollective flow and QGP properties11/19/2003 Why x-t correlation may be important? Spatial-size x-t correlationduration-time Magnitude and sign of x-t correlation are important for Rout, Rout/Rside, & extraction of duration-time

7 Zi-Wei LinCollective flow and QGP properties11/19/2003 Correlations in pion emission source: out-side out-t Positive and large, tends to reduce Rout Values: (17fm)**2 = 185 -2*168 + 431 Source Spatial-size x-t correlationDuration time ZWL,Ko&Pal,PRL89 Note:includes  decays

8 Zi-Wei LinCollective flow and QGP properties11/19/2003 out-side out-t K emission source (excludes  decays): ZWL&Ko,JPG29 Values: (3.4fm)**2 = 35 -2*22 + 20 K source also positive and large for K

9 Zi-Wei LinCollective flow and QGP properties11/19/2003 ● Turn off  decays to study HBT radii from the emission function ● Test hydro-like negative x-t correlation upon hadron formation in AMPT

10 Zi-Wei LinCollective flow and QGP properties11/19/2003 Pions at freezeout x out x side x y mostly partons ~surface emission ~volume emission >0 parton transverse flow

11 Zi-Wei LinCollective flow and QGP properties11/19/2003 x-t correlation for pions Au+Au at 200AGeV (b=0 fm)

12 Zi-Wei LinCollective flow and QGP properties11/19/2003 Already present for quarks x-t correlation for pions Au+Au at 200AGeV (b=0 fm)

13 Zi-Wei LinCollective flow and QGP properties11/19/2003 Effect of decays on source radii Hadronic decays produce mt-dependence in Rout & Rside

14 Zi-Wei LinCollective flow and QGP properties11/19/2003 Rout/Rside from emission function

15 Zi-Wei LinCollective flow and QGP properties11/19/2003 Can an initial negative x-t correlation survive later? Test negative x-t correlation from hydro models at RHIC energies

16 Zi-Wei LinCollective flow and QGP properties11/19/2003 large initial Rout/Rside ratio (source) Initial hadrons:

17 Zi-Wei LinCollective flow and QGP properties11/19/2003 large final Rout/Rside ratio (source) Negative x-t term becomes positive after hadronic scatterings Final hadrons:

18 Zi-Wei LinCollective flow and QGP properties11/19/2003 Hardtke&Voloshin, PRC61 Radii are different from source or from Gaussian fit to C(Q)

19 Zi-Wei LinCollective flow and QGP properties11/19/2003 from source from C(Q) fit big decrease for fitted Rout, Rout/Rside AMPT: Au+Au at 200AGeV at b=0 fm, 3mb Rout/Rside=1

20 Zi-Wei LinCollective flow and QGP properties11/19/2003 from source from C(Q) fit With an initial negative x-t correlation at hadron formation huge decrease for fitted Rout & Rout/Rside Rout/Rside >>1~=1 Rout/Rside=1

21 Zi-Wei LinCollective flow and QGP properties11/19/2003 ● Strong and positive x out -t correlation term ● tends to reduce R out and R out /R side. ● already present at parton freezeout/hadron formation ● An initial negative x-t correlation can lead to large R out /R side (when evaluated from emission function) ● R out /R side: >1 from emission function ~=1 from Gaussian fits to C(Q). ● Even with an large initial negative x-t (with Rout/Rside >>1 from the emission function) ● Further investigation is needed to find the reason. HBT summary

Download ppt "Zi-Wei LinCollective flow and QGP properties11/19/2003 ● Why x-t correlation may be important for HBT ● Origin of a large&positive x-t correlation: partonic?"

Similar presentations

Zi-Wei Lin (ECU) 28th WWND, Puerto Rico April 10, 2012 1 Update of Initial Conditions in A Multiple Phase Transport (AMPT) Model Zi-Wei Lin Department.

Zi-Wei Lin (ECU) 28th WWND, Puerto Rico April 10, Update of Initial Conditions in A Multiple Phase Transport (AMPT) Model Zi-Wei Lin Department.
Marcus Bleicher, Berkeley, Oct. 2005 Elliptic Flow in High Energetic Nuclear Collisions Marcus Bleicher & Xianglei Zhu FIAS & Institut für Theoretische.

Marcus Bleicher, Berkeley, Oct Elliptic Flow in High Energetic Nuclear Collisions Marcus Bleicher & Xianglei Zhu FIAS & Institut für Theoretische.
Detailed HBT measurement with respect to Event plane and collision energy in Au+Au collisions Takafumi Niida for the PHENIX Collaboration University of.

Detailed HBT measurement with respect to Event plane and collision energy in Au+Au collisions Takafumi Niida for the PHENIX Collaboration University of.
Mass ordering of differential elliptic flow and its violation for  mesons Tetsufumi Hirano Dept. of Physics, The Univ. of Tokyo Matsumoto, Feb. 10-11,

Mass ordering of differential elliptic flow and its violation for  mesons Tetsufumi Hirano Dept. of Physics, The Univ. of Tokyo Matsumoto, Feb ,
1 Heavy Ion Collisions at LHC in a Multiphase Transport Model  A multi-phase transport (AMPT) model  Rapidity and transverse momentum distributions 

1 Heavy Ion Collisions at LHC in a Multiphase Transport Model  A multi-phase transport (AMPT) model  Rapidity and transverse momentum distributions 
Phase transition of hadronic matter in a non-equilibrium approach Graduate Days, Frankfurt, 18.06.08, Hannah Petersen, Universität Frankfurt.

Phase transition of hadronic matter in a non-equilibrium approach Graduate Days, Frankfurt, , Hannah Petersen, Universität Frankfurt.
First Results From a Hydro + Boltzmann Hybrid Approach DPG-Tagung, Darmstadt, 10.03.08, Hannah Petersen, Universität Frankfurt.

First Results From a Hydro + Boltzmann Hybrid Approach DPG-Tagung, Darmstadt, , Hannah Petersen, Universität Frankfurt.
Forward-Backward Correlations in Relativistic Heavy Ion Collisions Aaron Swindell, Morehouse College REU 2006: Cyclotron Institute, Texas A&M University.

Forward-Backward Correlations in Relativistic Heavy Ion Collisions Aaron Swindell, Morehouse College REU 2006: Cyclotron Institute, Texas A&M University.
CERN May 30 2007 Heavy Ion Collisions at the LHC Last Call for Predictions Initial conditions and space-time scales in relativistic heavy ion collisions.

CERN May Heavy Ion Collisions at the LHC Last Call for Predictions Initial conditions and space-time scales in relativistic heavy ion collisions.
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 Systematic studies of freeze-out source size in relativistic heavy-ion collisions by RHIC-PHENIX Akitomo Enokizono Lawrence Livermore National Laboratory.

1 Systematic studies of freeze-out source size in relativistic heavy-ion collisions by RHIC-PHENIX Akitomo Enokizono Lawrence Livermore National Laboratory.
1 Isotropization of an equilibrating Quark-Gluon Plasma Bin Zhang a, Lie-Wen Chen b, Che-Ming Ko c a Arkansas State University, b Shanghai Jiaotong University,

1 Isotropization of an equilibrating Quark-Gluon Plasma Bin Zhang a, Lie-Wen Chen b, Che-Ming Ko c a Arkansas State University, b Shanghai Jiaotong University,
Freeze-Out in a Hybrid Model Freeze-out Workshop, 6.5.09 Goethe-Universität Frankfurt Hannah Petersen.

Freeze-Out in a Hybrid Model Freeze-out Workshop, Goethe-Universität Frankfurt Hannah Petersen.
Marcus Bleicher, WWND 2008 A fully integrated (3+1) dimensional Hydro + Boltzmann Hybrid Approach Marcus Bleicher Institut für Theoretische Physik Goethe.

Marcus Bleicher, WWND 2008 A fully integrated (3+1) dimensional Hydro + Boltzmann Hybrid Approach Marcus Bleicher Institut für Theoretische Physik Goethe.
Resonance Dynamics in Heavy Ion Collisions 22nd Winter Workshop on Nuclear Dynamics 17.03.2006, La Jolla, California Sascha Vogel, Marcus Bleicher UrQMD.

Resonance Dynamics in Heavy Ion Collisions 22nd Winter Workshop on Nuclear Dynamics , La Jolla, California Sascha Vogel, Marcus Bleicher UrQMD.
Collision system dependence of 3-D Gaussian source size measured by RHIC-PHENIX Akitomo Enokizono Lawrence Livermore National Laboratory 23 rd Winter Workshop.

Collision system dependence of 3-D Gaussian source size measured by RHIC-PHENIX Akitomo Enokizono Lawrence Livermore National Laboratory 23 rd Winter Workshop.
1 Searching for the QGP at RHIC Che-Ming Ko Texas A&M University  Signatures of QGP  Quark coalescence Baryon/meson ratio Hadron elliptic flows and quark.

1 Searching for the QGP at RHIC Che-Ming Ko Texas A&M University  Signatures of QGP  Quark coalescence Baryon/meson ratio Hadron elliptic flows and quark.
Marcus Bleicher, CCAST- Workshop 2004 Strangeness Dynamics and Transverse Pressure in HIC Marcus Bleicher Institut für Theoretische Physik Goethe Universität.

Marcus Bleicher, CCAST- Workshop 2004 Strangeness Dynamics and Transverse Pressure in HIC Marcus Bleicher Institut für Theoretische Physik Goethe Universität.
Sept 11- 14 WPCF-2008 Initial conditions and space-time scales in relativistic heavy ion collisions Yu. Sinyukov, BITP, Kiev Based on: Yu.S., I. Karpenko,

Sept WPCF-2008 Initial conditions and space-time scales in relativistic heavy ion collisions Yu. Sinyukov, BITP, Kiev Based on: Yu.S., I. Karpenko,
Uncertainties in jet event generators due to hadronizaton scheme, Other issues with energy loss on E-by-E hydro, and the extraction of transport coefficients.

Uncertainties in jet event generators due to hadronizaton scheme, Other issues with energy loss on E-by-E hydro, and the extraction of transport coefficients.

Similar presentations

Ads by Google