Presentation is loading. Please wait.

Presentation is loading. Please wait.

Lisa - Quark Matter 991 Beam Energy Evolution of HBT Sytematics at the AGS Mike Lisa, The Ohio State University for the E895 Collaboration N.N. Ajitanand,

Published byNicholas McDowell Modified over 8 years ago

Similar presentations

Presentation on theme: "Lisa - Quark Matter 991 Beam Energy Evolution of HBT Sytematics at the AGS Mike Lisa, The Ohio State University for the E895 Collaboration N.N. Ajitanand,"— Presentation transcript:

1 Lisa - Quark Matter 991 Beam Energy Evolution of HBT Sytematics at the AGS Mike Lisa, The Ohio State University for the E895 Collaboration N.N. Ajitanand, J. Alexander, D. Best, P. Brady, T. Case, B. Caskey, D. Cebra, J. Chance, I. Chemakin, P. Chung, V. Cianciolo, B. Cole, K. Crowe, A. Das, J. Draper, S. Gushue, M. Gilkes, M. Heffner, H. Hiejima, A. Hirsch, E. Hjort, L. Huo, M. Justice, M. Kaplan, J. Klay, D. Keane, J. Kintner, D. Krofcheck, R. Lacey, J. Lauret, E. LeBras, M. Lisa, H. Liu, Y. Liu, B. McGrath, Z. Milosevich, D. Olson, S. Panitkin, C. Pinkenburg N. Porile, G. Rai, H.-G. Ritter, J. Romero, R. Scharenberg, L. Schroeder, R. Sotlz, B. Srivastava, N. Stone, J. Symons, S. Wang, R. Wells, J. Whitfield,T. Wienold, R. Witt, L. Wood, X. Yang, Y. Zhang, W. Zhang Auckland - BNL - CMU - Columbia - UC Davis - Harbin - KSU - LBL - LLNL - St. Mary’s College - OSU - Purdue - Stony Brook Motivation and Measurement Correlation Systematics at Intermediate AGS energy E beam Centrality y m T  rp Summary

2 2Lisa - Quark Matter 99 HBT Excitation Function at AGS - Motivation Characterize  source geometry and dynamics as function of E beam, m T, y,  rp Watch for “anomalous” lifetimes/sizes (QGP@AGS?) Test dynamical models that provide “hadronic baseline” - can they extrapolate to RHIC? “”“” with transition cc 3D hydro model Rischke & Gyulassy NPA 608, 479 (1996) E observable AGSSPSRHIC Signatures of new physics may be subtle E observable AGSSPSRHIC

3 3Lisa - Quark Matter 99 Measurement with the EOS TPC Up to ~350 particles/event (60  - ) measured over large phase space Good reaction plane resolution  p/p  3% (dominated by MCS)  5% e - contamination in  - Posters by D. Cebra & C. Pinkenburg Talk by G. Rai in Thurs. plenary session

4 4Lisa - Quark Matter 99 The E895  - HBT Analysis Iterative correction for  p (typical increase in fit parameters by ~ 8%) 2-track cut eliminates track merging limits analysis to low p T (< 0.4 GeV/c) Full Coulomb-wave (  = 5 fm) Coulomb correction employed Analyze in frame fixed at y cm Event-mixing with  rp  selection: mix only events with “same”  rp Statistical uncertainties shown. Systematic errors of same order. Passage of a track “kills” an area ~ (1 cm) 2 on padrow  merging 128 padrows beam

5 5Lisa - Quark Matter 99 1-D Correlation Function Excitation Function at y cm Smooth evolution of 1-D fit parameters with E

6 6Lisa - Quark Matter 99 Bertsch-Pratt projections (11%  T y cm  0.35 p T = 0.1-0.3 MeV/c)

7 7Lisa - Quark Matter 99 Evolution of the BP and YKP fit parameters Increased production of long- lived  - -emitters  fall in Strong evolution of R s (R  ) with beam energy Hadronic model with or without meanfield underpredicts (apparent) geometric size at low beam energy

8 8Lisa - Quark Matter 99 Evolution of (apparent) Shape: Oblate to Prolate Transition from oblate to prolate shape at AGS connects Bevalac observations to SPS Transition in character of flow/expansion: transverse  longitudinal?

9 9Lisa - Quark Matter 99 m T dependence at y cm for 2 AGeV central collisions Dynamics (timescale/flow)  radii drop with m T  - from decays at low m T   increases with m T x (fm) y (fm)

10 10Lisa - Quark Matter 99 m T dependence at y cm for 6 AGeV central collisions At higher beam energy, R S falls more steeply

11 11Lisa - Quark Matter 99 Evolution of m T dependence (y=y cm  0.5) magnitude of R O (m T ) falls with E beam. Decline of R S with E beam driven primarily by increased falloff with m T at high energy. R L (m T ) roughly constant as function of E beam

12 12Lisa - Quark Matter 99 Evolution of systematics - data and model Observed evolution of systematics not reproduced by model Dynamics driving R S (m T ) may not depend on collision energy within RQMD

13 13Lisa - Quark Matter 99 Testing the model at the SPS For  -... Model under predicts apparent size below 10 AGeV... over predicts size at 158 AGeV Extrapolation to RHIC??? NA44 RQMD R out 4.88  0.216.96  0.14 R side 4.45  0.326.23  0.20 R long 6.03  0.357.94  0.21 I.G. Bearden et al (NA44) PRC58, 1656 (1998) D. Hardtke, Ph.D. thesis (1997)

14 14Lisa - Quark Matter 99 Rapidity dependence Rather flat dependence of fit parameters near y cm Near beam rapidity (0.9, 1.4), radii begin to fall off when analyzed in Au+Au c.m. frame

15 15Lisa - Quark Matter 99 Longitudinal flow from cross-term and y so : Rapidity dependence of Bertsch-Pratt R ol 2 and Yano-Koonin y so sensitive to longitudinal flow 2 AGeV: little longitudinal flow 8 AGeV: non-boost-invariant flow

16 16Lisa - Quark Matter 99 Centrality Dependence of the Correlations suppressed for central collisions due to increased production of ,  Gentle fall of sideward radii as size of overlap region falls b=2  7 fm: ~ 35% reduction in RMS

17 17Lisa - Quark Matter 99 Viewing the pion source in its natural frame b  0 collisions  anisotropy in momentum space (elliptic flow) Also visible in coordinate space? P. Danielewicz et al, PRL 81, 2438 (1998) Also see E895 elliptic flow poster toy example

18 18Lisa - Quark Matter 99 HBT with respect to the Reaction Plane - data b  4 - 9 fm Small but significant oscillation observed in sideward radius Consistent with naïve geometrical view, and RQMD Reduced strength of oscillation in R out may give information on lifetime or effective opaqueness Uncorrected for r.p. resolution cuts not identical

19 19Lisa - Quark Matter 99 Evolution of HBT @ AGS - Summary E895 has measured systematics of  - interferometry at 2-8 AGeV  no anomalous behaviour suggestive of QGP formation  apparent sideward radius (and ) fall with E  m T -dependence of R S weak at low E beam : less flow?  evolution from oblate (Bevalac-like) toward prolate (SPS-like) source  y-dependence of R ol 2, y so YKP  little longitudinal flow at 2 AGeV  gentle centrality dependence - no surprises The Next Frontier - Imaging the source in its natural frame  ~0.5 fm oscillation of R S observed at low E beam - less at higher energy  detailed study of source in natural frame may give info on opacity/lifetime

20 20Lisa - Quark Matter 99 Evolution of HBT @ AGS - Summary II Excitation Function - powerful tool to test/tune understanding of “normal” physics in R.H.I.C. RQMD does not reproduce evolution in detail  underpredicts transverse size below ~10 AGeV - overpredicts size above  incorrect evolution of x - p correlation?  correct outward radius an artifact of effective emission timescale?  little (relevant) evolution of dynamics in AGS range Plans  detailed analysis of HBT(  rp ) (including dispersion corrections)   - phasespace density as a function of p

21 21Lisa - Quark Matter 99 HBT with respect to the Reaction Plane - RQMD (perfect r.p. resolution) oscillation -  elliptical flow? R out oscillates against R side, with similar magnitude Oscillation strength roughly constant with E beam R long : ?

22 22Lisa - Quark Matter 99 Bertsch-Pratt projections - data and RQMD (11%  T y cm  0.35 p T = 0.1-0.3 MeV/c)

23 23Lisa - Quark Matter 99 Typical 1-  Error contours for BP fits Primary correlation is the familiar correlation between and radii Large acceptance  no strong correlations between radii Cross-term uncorrelated with any other parameter

24 24Lisa - Quark Matter 99  - Acceptance

Download ppt "Lisa - Quark Matter 991 Beam Energy Evolution of HBT Sytematics at the AGS Mike Lisa, The Ohio State University for the E895 Collaboration N.N. Ajitanand,"

Similar presentations

M. Oldenburg Probing QCD with High Energy Nuclear Collisions, Hirschegg, Austria, January 2005 1 Directed Flow in Au+Au Collisions Markus D. Oldenburg.

M. Oldenburg Probing QCD with High Energy Nuclear Collisions, Hirschegg, Austria, January Directed Flow in Au+Au Collisions Markus D. Oldenburg.
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.
What do we Learn From Azimuthal Correlation Measurements in PHENIX Roy. A. Lacey Nuclear Chemistry, SUNY, Stony Brook.

What do we Learn From Azimuthal Correlation Measurements in PHENIX Roy. A. Lacey Nuclear Chemistry, SUNY, Stony Brook.
Elliptic flow of thermal photons in Au+Au collisions at 200GeV QNP2009 Beijing, Sep 21 - 26, 2009 F.M. Liu Central China Normal University, China T. Hirano.

Elliptic flow of thermal photons in Au+Au collisions at 200GeV QNP2009 Beijing, Sep , 2009 F.M. Liu Central China Normal University, China T. Hirano.
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.
1Erice 2012, Roy A. Lacey, Stony Brook University.

1Erice 2012, Roy A. Lacey, Stony Brook University.
Universal Centrality and Collision Energy Trends for v 2 Measurements From 2D Angular Correlations Dave Kettler for the STAR Collaboration Hot Quarks Estes.

Universal Centrality and Collision Energy Trends for v 2 Measurements From 2D Angular Correlations Dave Kettler for the STAR Collaboration Hot Quarks Estes.
In relativistic heavy ion collisions a high energy density matter Quark-Gluon Plasma (QGP) may be formed. Various signals have been proposed which probe.

In relativistic heavy ion collisions a high energy density matter Quark-Gluon Plasma (QGP) may be formed. Various signals have been proposed which probe.
1/6/02Gyulassy-1 The Space-Time Puzzle at RHIC  Instead of slowly burning QGP Log Dt~ R/v def >>R  Evidence for Sudden freezeout Dt

1/6/02Gyulassy-1 The Space-Time Puzzle at RHIC  Instead of slowly burning QGP Log Dt~ R/v def >>R  Evidence for Sudden freezeout Dt
SLB: 1 UC Davis 11 October 2002 DNP – East Lansing Composites in 2-8AGev Collisions in E895 Stephen Baumgart University of California, Davis for the E895.

SLB: 1 UC Davis 11 October 2002 DNP – East Lansing Composites in 2-8AGev Collisions in E895 Stephen Baumgart University of California, Davis for the E895.
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.
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.
ISMD31 / Sept. 4, 2001 Toru Sugitate / Hiroshima Univ. The 31 st International Symposium on Multiparticle Dynamics on 1-7, Sept. 2001 in Datong, China.

ISMD31 / Sept. 4, 2001 Toru Sugitate / Hiroshima Univ. The 31 st International Symposium on Multiparticle Dynamics on 1-7, Sept in Datong, China.
Particle Spectra at AGS, SPS and RHIC Dieter Röhrich Fysisk institutt, Universitetet i Bergen Similarities and differences Rapidity distributions –net.

Particle Spectra at AGS, SPS and RHIC Dieter Röhrich Fysisk institutt, Universitetet i Bergen Similarities and differences Rapidity distributions –net.
Masashi Kaneta, LBNL Masashi Kaneta for the STAR collaboration Lawrence Berkeley National Lab. First results from STAR experiment at RHIC - Soft hadron.

Masashi Kaneta, LBNL Masashi Kaneta for the STAR collaboration Lawrence Berkeley National Lab. First results from STAR experiment at RHIC - Soft hadron.
Identified Particle Ratios at large p T in Au+Au collisions at  s NN = 200 GeV Matthew A. C. Lamont for the STAR Collaboration - Talk Outline - Physics.

Identified Particle Ratios at large p T in Au+Au collisions at  s NN = 200 GeV Matthew A. C. Lamont for the STAR Collaboration - Talk Outline - Physics.
QM2006 Shanghai, China 1 High-p T Identified Hadron Production in Au+Au and Cu+Cu Collisions at RHIC-PHENIX Masahiro Konno (Univ. of Tsukuba) for the PHENIX.

QM2006 Shanghai, China 1 High-p T Identified Hadron Production in Au+Au and Cu+Cu Collisions at RHIC-PHENIX Masahiro Konno (Univ. of Tsukuba) for the PHENIX.

Similar presentations

Ads by Google