Presentation is loading. Please wait.

Presentation is loading. Please wait.

Hiroshi Masui / Univ. of Tsukuba

Published byAri Chandra Modified over 5 years ago

Similar presentations

Presentation on theme: "Hiroshi Masui / Univ. of Tsukuba"— Presentation transcript:

1 Hiroshi Masui / Univ. of Tsukuba
Measurement of Centrality dependence of identified hadron Elliptic Flow in sNN = 200 GeV Au+Au collisions at RHIC - PHENIX Hiroshi Masui / Univ. of Tsukuba for the Collaboration JPS, 62nd Annual Meeting JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

2 Why Elliptic Flow ? Sensitive probe in the early stage of heavy ion collisions Initial geometry overlap (eccentricity) Initial density + EOS System size (number of collisions) Final momentum anisotropy (v2) Z Y X Reaction plane Py Pz Px JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

3 Universal Scaling of v2 ? Universal scaling of v2 suggest
QM2006 A. Taranenko Universal scaling of v2 suggest v2 for a variety of particle species at RHIC are determined through (, KET/nq) Its magnitude is established in partonic level before hadronization At mid-rapidity JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

4 Motivation Universal scaling of v2 has been observed by assuming
  v2 of non-identified charged hadrons v2  F(KET/nq) Questions Are these assumptions really correct ? The scaling of v2 is tested from central to mid-central. How about peripheral collisions ? Study the validity of the scaling of v2 in a wide range of centrality for identified hadrons JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

5 PHENIX Experiment Vertex, Centrality Event plane Tracking PID BBC, ZDC
BBC (full azimuth, || = )  Large rapidity interval Tracking DC, PC PID TOF (||</4, ||<0.35), t ~ 120 ps , p : pT < 4 GeV/c, K : pT < 3 GeV/c JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

6 Centrality dependence of v2(pT)
v2 increase with increasing centrality Similar mass ordering for all centrality JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

7 KET + NCQ scaling of v2 Scaling holds for all centrality ?
Ratio of data to fit (next slide) JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

8 v2(Data)/v2(Fit) Scaling works within systematic errors, except for low KET Radial flow ? JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

9 Eccentricity Eccentricity () is estimated by Glauber MC simulation
 value’s are not changed so much in b = fm ( % centrality). / ~ 10 % Quite different for different definitions of  at central and peripheral Systematic error on  ~ % JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

10 Eccentricity scaling Scaled v2 with participant eccentricity
Start to break even in mid-central at high KET Scaling works at low KET within systematic errors Clear difference between central and peripheral The difference of v2 is also observed for different eccentricity * Only statistical errors are shown * Systematic error on  ~ % JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

11 Summary Study the scaling of v2(pT) for identified hadrons in a wide range of centrality KET + quark number scaling Scaling holds within systematic errors, except for low KET New RXNP detector could help us to reduce systematic errors add more statistics at peripheral events Eccentricity scaling Scaling breaks even in mid-central at high KET works for low KET within systematic errors Clear difference between central and peripheral Suggest that v2    v2    f(Npart) JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

12 Back up JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

13 Elliptic Flow at RHIC Substantial elliptic flow signals are observed for a variety of particle species at RHIC JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

14 Event plane resolution
Event plane resolution is determined by multiplicity and v2 Maximum at mid-central High multiplicity, small v2 at central Low multiplicity, large v2 at peripheral JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

15 Terminology Definition of eccentricity Weighting Averaging
std : Standard eccentricity var (participant eccentricity part) 2 (event plane eccentricity) : var, subtract auto-correlation event-by-event (an idea from ShinIchi) Weighting part (coll) Calculated by weighting with Npart (Ncoll) distribution Averaging {2}  2 Averaging of 2 over all events, then take square root More natural definition like measured v2 Total : 3  2  2 = 12 definitions JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

16 Eccentricity Estimated by Glauber MC simulation
coll > part due to steeper Ncoll distributions compared to Npart JPS, Sep/24/2007 Hiroshi Masui / Univ. of Tsukuba

Download ppt "Hiroshi Masui / Univ. of Tsukuba"

Similar presentations

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.
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.
R. Lacey, SUNY Stony Brook 1 Arkadij Taranenko Quark Matter 2006 November 13-20, Shanghai, China Nuclear Chemistry Group SUNY Stony Brook, USA PHENIX Studies.

R. Lacey, SUNY Stony Brook 1 Arkadij Taranenko Quark Matter 2006 November 13-20, Shanghai, China Nuclear Chemistry Group SUNY Stony Brook, USA PHENIX Studies.
Measurement of elliptic flow of electrons from heavy flavor RHIC Shingo Sakai (Univ. of Tsukuba / JSPS)

Measurement of elliptic flow of electrons from heavy flavor RHIC Shingo Sakai (Univ. of Tsukuba / JSPS)
Identified particle v 3 measurements at 200 GeV Au+Au collisions at RHIC-PHENIX experiment Sanshiro Mizuno for PHENIX Collaboration University of Tsukuba.

Identified particle v 3 measurements at 200 GeV Au+Au collisions at RHIC-PHENIX experiment Sanshiro Mizuno for PHENIX Collaboration University of Tsukuba.
The Azimuthal Anisotropy of Electrons from Heavy Flavor Decays in √s NN =200 GeV Au-Au Collisions at PHENIX Shingo Sakai for PHENIX Collaborations (Univ.

The Azimuthal Anisotropy of Electrons from Heavy Flavor Decays in √s NN =200 GeV Au-Au Collisions at PHENIX Shingo Sakai for PHENIX Collaborations (Univ.
Source Dynamics from Deuteron and Anti-deuteron Measurements in 200 GeV Au+Au Collisions Hugo E Valle Vanderbilt University (For the PHENIX Collaboration)

Source Dynamics from Deuteron and Anti-deuteron Measurements in 200 GeV Au+Au Collisions Hugo E Valle Vanderbilt University (For the PHENIX Collaboration)
System size and beam energy dependence of azimuthal anisotropy from PHENIX Michael Issah Vanderbilt University for the PHENIX Collaboration QM2008, Jaipur,

System size and beam energy dependence of azimuthal anisotropy from PHENIX Michael Issah Vanderbilt University for the PHENIX Collaboration QM2008, Jaipur,
High p T identified hadron anisotropic flow and Deuteron production in 200 GeV Au+Au Collisions Shengli Huang Vanderbilt University for the PHENIX Collaboration.

High p T identified hadron anisotropic flow and Deuteron production in 200 GeV Au+Au Collisions Shengli Huang Vanderbilt University for the PHENIX Collaboration.
Sourav Tarafdar Banaras Hindu University For the PHENIX Collaboration Hard Probes 2012 Measurement of electrons from Heavy Quarks at PHENIX.

Sourav Tarafdar Banaras Hindu University For the PHENIX Collaboration Hard Probes 2012 Measurement of electrons from Heavy Quarks at PHENIX.
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.
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.
Nov2,2001High P T Workshop, BNL Julia Velkovska High pt Hadrons from  sNN = 130 GeV Au-Au collisions measured in PHENIX Julia Velkovska (BNL) for PHENIX.

Nov2,2001High P T Workshop, BNL Julia Velkovska High pt Hadrons from  sNN = 130 GeV Au-Au collisions measured in PHENIX Julia Velkovska (BNL) for PHENIX.
QM’05 Budapest, HungaryHiroshi Masui (Univ. of Tsukuba) 1 Anisotropic Flow in  s NN = 200 GeV Cu+Cu and Au+Au collisions at RHIC - PHENIX Hiroshi Masui.

QM’05 Budapest, HungaryHiroshi Masui (Univ. of Tsukuba) 1 Anisotropic Flow in  s NN = 200 GeV Cu+Cu and Au+Au collisions at RHIC - PHENIX Hiroshi Masui.
M. Issah QM04 1 Azimuthal Anisotropy Measurements in PHENIX via Cumulants of Multi-particle Azimuthal Correlations Michael Issah (SUNY Stony Brook ) for.

M. Issah QM04 1 Azimuthal Anisotropy Measurements in PHENIX via Cumulants of Multi-particle Azimuthal Correlations Michael Issah (SUNY Stony Brook ) for.
WWND 2011, Winter Park, CO, 7/Feb/2011ShinIchi Esumi, Univ. of Tsukuba1 v n {EP} measurements with forward rapidity  n in 200GeV Au+Au collisions at RHIC-PHENIX.

WWND 2011, Winter Park, CO, 7/Feb/2011ShinIchi Esumi, Univ. of Tsukuba1 v n {EP} measurements with forward rapidity  n in 200GeV Au+Au collisions at RHIC-PHENIX.
1 Nuclear modification and elliptic flow measurements for  mesons at  s NN = 200 GeV d+Au and Au+Au collisions by PHENIX Dipali Pal for the PHENIX collaboration.

1 Nuclear modification and elliptic flow measurements for  mesons at  s NN = 200 GeV d+Au and Au+Au collisions by PHENIX Dipali Pal for the PHENIX collaboration.
2001.10.20 JPS/DNPY. Akiba Single Electron Spectra from Au+Au collisions at RHIC Y. Akiba (KEK) for PHENIX Collaboration.

JPS/DNPY. Akiba Single Electron Spectra from Au+Au collisions at RHIC Y. Akiba (KEK) for PHENIX Collaboration.
Heavy Flavor Workshop, Beijing, China, 2006.11.22ShinIchi Esumi, Univ. of Tsukuba1 Heavy flavor collective flow measurements at RHIC ShinIchi Esumi Univ.

Heavy Flavor Workshop, Beijing, China, ShinIchi Esumi, Univ. of Tsukuba1 Heavy flavor collective flow measurements at RHIC ShinIchi Esumi Univ.
News from ALICE Jan PLUTA Heavy Ion Reaction Group (HIRG) Warsaw University of Technology February 22, 20161 XIII GDRE Workshop, SUBATECH, Nantes.

News from ALICE Jan PLUTA Heavy Ion Reaction Group (HIRG) Warsaw University of Technology February 22, XIII GDRE Workshop, SUBATECH, Nantes.

Similar presentations

Ads by Google