Presentation is loading. Please wait.

Presentation is loading. Please wait.

1 P. Chung Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au Collisions at.

Published byCarmel Hancock Modified over 9 years ago

Similar presentations

Presentation on theme: "1 P. Chung Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au Collisions at."— Presentation transcript:

1 1 P. Chung Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au Collisions at

2 P. Chung, SUNY Stony Brook 2 Outline 1. Motivation 2. Brief Review of Correlation analysis methods 3.Data Analysis & Results Correlation functions Source functions Source parameters & dependence (centrality, mT, etc) 4.Conclusion/s

3 P. Chung, SUNY Stony Brook 3 initial state pre-equilibrium QGP and hydrodynamic expansion hadronization hadronic phase and freeze-out Conjecture of collisions at RHIC : Motivation Which observables & phenomena connect to the de-confined stage? Courtesy S. Bass

4 P. Chung, SUNY Stony Brook 4 QGP and hydrodynamic expansion One Scenario : Motivation Expectation: A de-confined phase leads to an emitting system characterized by a much larger space-time extent than would be expected from a system which remained in the hadronic phase Increased System Entropy that survives hadronization

5 P. Chung, SUNY Stony Brook 5 Experimental Setup PHENIX Detector Several Subsystems exploited for the analysis Excellent Pid is achieved

6 P. Chung, SUNY Stony Brook 6 Cuts Dphi (rad) Dz (cm)

7 P. Chung, SUNY Stony Brook 7 Cuts Dz (cm) Dphi (rad)

8 P. Chung, SUNY Stony Brook 8 Analysis Summary Image analysis in PHENIX Follows three basic steps. I. Track selection II. Evaluation of the Correlation Functions (with pair-cuts etc.) III. Imaging of Correlation functions Fits to correlation function Dphi >0.02 dz < 5 cm Dphi >0.01 dz > 5 cm

9 P. Chung, SUNY Stony Brook 9 Analysis Technique Correlation Function Direct Fits to the Correlation Functions Imaging SourceFunction

10 P. Chung, SUNY Stony Brook 10 Imaging Technique Technique Devised by: D. Brown, P. Danielewicz, PLB 398:252 (1997). PRC 57:2474 (1998). Inversion of Linear integral equation to obtain source function Source function (Distribution of pair separations) Encodes FSI Correlationfunction Inversion of this integral equation ==  Source Function Emitting source 1D Koonin Pratt

11 P. Chung, SUNY Stony Brook 11 Imaging Inversion procedure

12 P. Chung, SUNY Stony Brook 12 ResultsResults  Non Gaussian tail observed in source function PHENIX Preliminary

13 P. Chung, SUNY Stony Brook 13  Non Gaussian tail observed in source function ResultsResults PHENIX Preliminary

14 P. Chung, SUNY Stony Brook 14  Non Gaussian tail NOT observed at the AGS ResultsResults PHENIX Preliminary E895

15 P. Chung, SUNY Stony Brook 15 Correlation Fits Parameters of the source function Minimize Chi-squared [Parameterized form for S(r)] + convolution with kernel  calculated C(q) Measured correlation function

16 P. Chung, SUNY Stony Brook 16 Extraction of Source Parameters Fit Function (Pratt et al.) This fit function allows extraction of both the short- and long-range components of the source image This fit function allows extraction of both the short- and long-range components of the source image Bessel Functions Radii Pair Fractions

17 P. Chung, SUNY Stony Brook 17 Input source function recovered Procedure is Robust ! Quick Test - 1

18 P. Chung, SUNY Stony Brook 18 Fitting correlation functions Kinematics “Spheroid/Blimp” Ansatz Brown & Danielewicz PRC 64, 014902 (2001) “spheroid/Blimp” parameters

19 P. Chung, SUNY Stony Brook 19 Fix R T = R and vary a Source parameters Recovered Sensitivity Tests

20 P. Chung, SUNY Stony Brook 20 Fix a and vary R Source parameters Recovered Sensitivity Tests

21 P. Chung, SUNY Stony Brook 21  Spheroid source function yield excellent fits to data ResultsResults PHENIX Preliminary

22 P. Chung, SUNY Stony Brook 22 Same source functions from different parameterization Comparison of Source Functions

23 P. Chung, SUNY Stony Brook 23 Short and long-range components of the source Short-range  Long-range  T. Csorgo M. Csanad

24 P. Chung, SUNY Stony Brook 24 Short and long-range components of the source T. Csorgo M. Csanad

25 P. Chung, SUNY Stony Brook 25 Short and long-range components of the source T. Csorgo M. Csanad Core Halo assumption Expt 

26 P. Chung, SUNY Stony Brook 26 Next Steps; 3D imaging/moment fitting Higher l moments  angular deformation of source

27 P. Chung, SUNY Stony Brook 27 Next Steps; 3D imaging/moment fitting Solid proof of principle Simulation results

28 P. Chung, SUNY Stony Brook 28 First Extensive study of two-pion 1D source First Extensive study of two-pion 1D source images in Au+Au collisions at RHIC Results indicate evidence for non-Gaussian tail Results indicate evidence for non-Gaussian tail Long-range behavior of source function ~ 3x short-range Long-range behavior of source function ~ 3x short-range Centrality dependence of radius parameters and lambda Centrality dependence of radius parameters and lambda Fraction in compatible with simple estimate of omega decay Further detailed 3D analysis in progress to pin-down origin of long-range behavior SummarySummary

Download ppt "1 P. Chung Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au Collisions at."

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
Azimuthal Correlation Studies Via Correlation Functions and Cumulants N. N. Ajitanand Nuclear Chemistry, SUNY, Stony Brook.

Azimuthal Correlation Studies Via Correlation Functions and Cumulants N. N. Ajitanand Nuclear Chemistry, SUNY, Stony Brook.
Multi-Particle Azimuthal Correlations at RHIC !! Roy A. Lacey USB - Chem (SUNY Stony Brook ) What do they tell us about Possible Quenching?

Multi-Particle Azimuthal Correlations at RHIC !! Roy A. Lacey USB - Chem (SUNY Stony Brook ) What do they tell us about Possible Quenching?
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.
Yorito Yamaguchi For the PHENIX collaboration CNS, University of Tokyo 10/14/2008ATHIC2008 1/13.

Yorito Yamaguchi For the PHENIX collaboration CNS, University of Tokyo 10/14/2008ATHIC2008 1/13.
Measurement of v 2 and v 4 in Au+Au Collisions at different beam energy from PHENIX Shengli Huang for PHENIX Collaboration Vanderbilt University.

Measurement of v 2 and v 4 in Au+Au Collisions at different beam energy from PHENIX Shengli Huang for PHENIX Collaboration Vanderbilt University.
Julia VelkovskaMoriond QCD, March 27, 2015 Geometry and Collective Behavior in Small Systems from PHENIX Julia Velkovska for the PHENIX Collaboration Moriond.

Julia VelkovskaMoriond QCD, March 27, 2015 Geometry and Collective Behavior in Small Systems from PHENIX Julia Velkovska for the PHENIX Collaboration Moriond.
1 Roy Lacey & Paul Chung Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au collisions at.

1 Roy Lacey & Paul Chung Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au collisions at.
A. ISMD 2003, Cracow Indication for RHIC M. Csanád, T. Csörgő, B. Lörstad and A. Ster (Budapest & Lund) Buda-Lund hydro fits to.

A. ISMD 2003, Cracow Indication for RHIC M. Csanád, T. Csörgő, B. Lörstad and A. Ster (Budapest & Lund) Buda-Lund hydro fits to.
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.
Roy A. Lacey, Stony Brook; 24 th Winter Workshop on Nuclear Dynamics, April 5-12, 2008 1 Roy A. Lacey Prospects for locating the QCD Critical End Point.

Roy A. Lacey, Stony Brook; 24 th Winter Workshop on Nuclear Dynamics, April 5-12, Roy A. Lacey Prospects for locating the QCD Critical End Point.
Flow and Femtoscopy from QGP Hydro + Hadronic Cascade Tetsufumi Hirano Dept. of Physics The Univ. of Tokyo WPCF, Aug. 1-3, 2007.

Flow and Femtoscopy from QGP Hydro + Hadronic Cascade Tetsufumi Hirano Dept. of Physics The Univ. of Tokyo WPCF, Aug. 1-3, 2007.
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.
WPCF07, Sonoma, California, August 2 20071 Observation of Extended Pion Sources in Relativistic Heavy Ion Collisions: extraction of source breakup time.

WPCF07, Sonoma, California, August Observation of Extended Pion Sources in Relativistic Heavy Ion Collisions: extraction of source breakup time.
WWND, San Diego1 Scaling Characteristics of Azimuthal Anisotropy at RHIC Michael Issah SUNY Stony Brook for the PHENIX Collaboration.

WWND, San Diego1 Scaling Characteristics of Azimuthal Anisotropy at RHIC Michael Issah SUNY Stony Brook for the PHENIX Collaboration.
1 Paul Chung ( for the PHENIX Collaboration ) Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au collisions at.

1 Paul Chung ( for the PHENIX Collaboration ) Nuclear Chemistry, SUNY, Stony Brook Evidence for a long-range pion emission source in Au+Au collisions at.
PHENIX measurements of reaction plane dependence of high p T photons and pions in Au+Au collisions Vladislav Pantuev, University at Stony Brook for PHENIX.

PHENIX measurements of reaction plane dependence of high p T photons and pions in Au+Au collisions Vladislav Pantuev, University at Stony Brook for PHENIX.
Zbigniew Chajęcki National Superconducting Cyclotron Laboratory Michigan State University Probing reaction dynamics with two-particle correlations.

Zbigniew Chajęcki National Superconducting Cyclotron Laboratory Michigan State University Probing reaction dynamics with two-particle correlations.
Nov 2001 Craig Ogilvie 1 Angular Correlations at High pt: Craig Ogilvie for the Phenix Collaboration Energy-loss: increased medium-induced gluon-radiation.

Nov 2001 Craig Ogilvie 1 Angular Correlations at High pt: Craig Ogilvie for the Phenix Collaboration Energy-loss: increased medium-induced gluon-radiation.
Two Particle Correlations and Viscosity in Heavy Ion Collisions Monika Sharma for the Wayne State University STAR Collaboration Outline: Motivation Measurement.

Two Particle Correlations and Viscosity in Heavy Ion Collisions Monika Sharma for the Wayne State University STAR Collaboration Outline: Motivation Measurement.

Similar presentations

Ads by Google