1 February 8, 2008 Sunil Dogra QM2008 Jaipur 1 Sunil M. Dogra University of Jammu, India (For the STAR collaboration)‏ Outline Motivation STAR Experiment.

Slides:

Advertisements

Similar presentations

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

Advertisements

K*(892) Resonance Production in Au+Au and Cu+Cu Collisions at  s NN = 200 GeV & 62.4 GeV Motivation Analysis and Results Summary 1 Sadhana Dash Institute.

Ultra Peripheral Collisions at RHIC Coherent Coupling Coherent Coupling to both nuclei: photon~Z 2, Pomeron~A 4/3 Small transverse momentum p t ~ 2h 

Measurement of charmonia at mid-rapidity at RHIC-PHENIX  c  J/   e + e -  in p+p collisions at √s=200GeV Susumu Oda CNS, University of Tokyo For.

Physics with ALICE-PMD Basanta K. Nandi IIT Bombay For PMD collaboration.

Bingchu Huang, USTC/BNL 1 Bingchu Huang (for STAR Collaboration) University of Science and Technology of China (USTC) Brookhaven National Laboratory (BNL)

- RHIC, PHENIX PHENIX Pad Chambers - Net-Charge Fluctuations Predictions PHENIX Analysis Comparison to simulations O UTLINE.

STAR Collaboration Meeting, MIT, July Interference in Coherent Vector Meson Production in UPC Au+Au Collisions at √s = 200GeV Brooke Haag UC Davis.

Terence Tarnowsky Long-Range Multiplicity Correlations in Au+Au at Terence J Tarnowsky Purdue University for the STAR Collaboration 22nd Winter Workshop.

STAR Collaboration Meeting, UCD group meeting, February Ultra Peripheral Collisions What is a UPC? Photonuclear interaction Two nuclei “miss” each.

System size and beam energy dependence of azimuthal anisotropy from PHENIX Michael Issah Vanderbilt University for the PHENIX Collaboration QM2008, Jaipur,

ALICE EMCal Physics and Functional Requirements Overview.

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.

Charge Asymmetry Correlations Searching for Local Parity Violation Quan Wang, Purdue For STAR Collaboration.

Hadronic Resonances in Heavy-Ion Collisions at ALICE A.G. Knospe for the ALICE Collaboration The University of Texas at Austin 25 July 2013.

1 The Study of D and B Meson Semi- leptonic Decay Contributions to the Non-photonic Electrons Xiaoyan Lin CCNU, China/UCLA for the STAR Collaboration 22.

Xiaoyan LinQuark Matter 2006, Shanghai, Nov , Study B and D Contributions to Non- photonic Electrons via Azimuthal Correlations between Non-

Sevil Salur for STAR Collaboration, Yale University WHAT IS A PENTAQUARK? STAR at RHIC, BNL measures charged particles via Time Projection Chamber. Due.

Jinghua Fu Institute of Particle Physics, CCNU, Wuhan TUHEP, Tsinghua University, Beijing On the Measurement of Event Mean Pt Fluctuations Motivation Analytical.

Study of isospin fluctuations in Au + Au collisions at √S NN = 200GeV Tomoaki Nakamura / Kensuke Homma for the PHENIX Collaboration Hiroshima University.

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.

Partonic Collectivity at RHIC ShuSu Shi for the STAR collaboration Lawrence Berkeley National Laboratory Central China Normal University.

SQM2004, Cape Town, Sept. 16, 2004 STAR 1 Cronin Effect for the identified particles from 200 GeV d+Au collisions Xiangzhou Cai Shanghai INstitute of Applied.

Christof Roland / MITSQM 2004September 2004 Christof Roland / MIT For the NA49 Collaboration Strange Quark Matter 2004 Capetown, South Africa Event-by-Event.

M. Issah QM04 1 Azimuthal Anisotropy Measurements in PHENIX via Cumulants of Multi-particle Azimuthal Correlations Michael Issah (SUNY Stony Brook ) for.

Higher moments of net-charge multiplicity distributions at RHIC energies in STAR Nihar R. Sahoo, VECC, India (for the STAR collaboration) 1 Nihar R. Sahoo,

Study of the QCD Phase Structure through High Energy Heavy Ion Collisions Bedanga Mohanty National Institute of Science Education and Research (NISER)

G. Musulmanbekov, K. Gudima, D.Dryablov, V.Geger, E.Litvinenko, V.Voronyuk, M.Kapishin, A.Zinchenko, V.Vasendina Physics Priorities at NICA/MPD.

S.A. Voloshin STAR QM’06: Energy and system size dependence of elliptic flow and v 2 /  scaling page1 Sergei A. Voloshin Wayne State University, Detroit,

July 19, FTPC and its Utility to PMD program OUTLINE 1.FTPC and PMD: A comparison 2.FTPC and PMD: Physics issues 3.Summary FTPC Review: BNL, July.

Photon 2003Falk Meissner, LBNL Falk Meissner Lawrence Berkeley National Laboratory For the STAR Collaboration Photon 2003 April 2003 Coherent Electromagnetic.

Energy Dependence of ϕ -meson Production and Elliptic Flow in Au+Au Collisions at STAR Md. Nasim (for the STAR collaboration) NISER, Bhubaneswar, India.

Flow fluctuation and event plane correlation from E-by-E Hydrodynamics and Transport Model Victor Roy Central China Normal University, Wuhan, China Collaborators.

Incident-energy and system-size dependence of directed flow Gang Wang (UCLA) for STAR Collaboration  Introduction to directed flow  Detectors: ZDC-SMD,

Xiaoyan LinHard Probes 2006, Asilomar, June Azimuthal correlations between non-photonic electrons and charged hadrons in p+p collisions from STAR.

M. Muniruzzaman University of California Riverside For PHENIX Collaboration Reconstruction of  Mesons in K + K - Channel for Au-Au Collisions at  s NN.

FTPC status and results Summary of last data taken AuAu and dAu calibration : Data Quality Physic results with AuAu data –Spectra –Flow Physic results.

Charged Particle Multiplicity and Transverse Energy in √s nn = 130 GeV Au+Au Collisions Klaus Reygers University of Münster, Germany for the PHENIX Collaboration.

Non-photonic electron production in p+p collisions at √s=200 GeV Xiaozhi Bai for the STAR collaboration Central China Normal University University of Illinois.

Abhilash Nair STAR Collaboration University of Illinois at Chicago 1 STAR.

NSTAR2011, Jefferson Lab, USA May 17-20, 2011 Mitglied der Helmholtz-Gemeinschaft Tamer Tolba for the WASA-at-COSY collaboration Institut für Kernphysik.

Search for Disoriented Chiral Condensates in 158AGeV Pb+Pb Collisions Tapan K.Nayak for the WA98 Collaboration Nucl-ex/

Feasibility study of Heavy Flavor tagging with charged kaons in Au-Au Collisions at √s=200 GeV triggered by High Transverse Momentum Electrons. E.Kistenev,

R ECENT RESULTS ON EVENT - BY - EVENT FLUCTUATIONS FROM RHIC BEAM ENERGY SCAN PROGRAM AT STAR EXPERIMENT Nihar R. Sahoo (for the STAR Collaboration) Texas.

Christof Roland / MITQuark Matter 2004January 2004 Christof Roland / MIT For the NA49 Collaboration Quark Matter 2004 Oakland,CA Event-by-Event Fluctuations.

QM2008 Jaipur, India Feb.4– Feb. 10, STAR's Measurement of Long-range Forward- backward Multiplicity Correlations as the Signature of “Dense Partonic.

Search for Centauro Events at RHIC-PHENIX Kensuke Homma / Tomoaki Nakamura for the PHENIX Collaboration Hiroshima University Contents History of Centauro.

Charged and Neutral Kaon correlations in Au-Au Collisions at sqrt(s_NN) = 200 GeV using the solenoidal tracker at RHIC (STAR) Selemon Bekele The Ohio State.

Hadronic resonance production in Pb+Pb collisions from the ALICE experiment Anders Knospe on behalf of the ALICE Collaboration The University of Texas.

PHOBOS at RHIC 2000 XIV Symposium of Nuclear Physics Taxco, Mexico January 2001 Edmundo Garcia, University of Maryland.

S. K. PalDCS WORKSHOP 17 JUN 2002 FRONT VIEW PMD Layout and Design Two planes: Veto + PreShower Gas detector with hexagonal cells Cell cross section: 0.22.

Jet Production in Au+Au Collisions at STAR Alexander Schmah for the STAR Collaboration Lawrence Berkeley National Lab Hard Probes 2015 in Montreal/Canada.

PHENIX Results from the RHIC Beam Energy Scan Brett Fadem for the PHENIX Collaboration Winter Workshop on Nuclear Dynamics 2016.

Brett Fadem of Muhlenberg College for the PHENIX Collaboration.

J. Zhao Hard Probe 2012, Cagliari 1, Lawrence Berkeley National Lab, USA 2, Shanghai Institution of Applied Physics, CAS, China Di-electron Production.

PHENIX J/  Measurements at  s = 200A GeV Wei Xie UC. RiverSide For PHENIX Collaboration.

9/11/2003Tomoaki Nakamura - Hiroshima Univ.1 Event-by-event charge/neutral fluctuation at RHIC-PHENIX Tomoaki Nakamura / Kensuke Homma Hiroshima University.

Direct Photon v 2 Study in 200 GeV AuAu Collisions at RHIC Guoji Lin (Yale) For STAR Collaboration RHIC & AGS Users’ Meeting, BNL, June 5-9.

Fall DNP Meeting,  meson production in Au-Au and d-Au collision at \ /s NN = 200 GeV Dipali Pal Vanderbilt University (for the PHENIX collaboration)

Directed flow of identified particles from Au+Au Collisions at RHIC

Directed flow of identified particles from Au+Au Collisions at RHIC

EXPERIMENTAL REVIEW OF DISORIENTED CHIRAL CONDENSATES

Larisa Nogach Institute of High Energy Physics, Protvino

Heavy Ion Ohsaka University Takahito Todoroki

The Study of Elliptic Flow for PID Hadron at RHIC-PHENIX

Xiaobin Wang (for the STAR Collaboration)

“Hard” & “Soft” Interactions in Proton + Proton 200GeV

High-pT Identified Charged Hadrons in √sNN = 200 GeV Au+Au Collisions

Hiroshi Masui for the PHENIX collaboration August 5, 2005

Directed Flow from Au+Au Collisions at 200 GeV

Presentation transcript:

1 February 8, 2008 Sunil Dogra QM2008 Jaipur 1 Sunil M. Dogra University of Jammu, India (For the STAR collaboration)‏ Outline Motivation STAR Experiment Analysis Method Results Summary STAR’s measurement of correlation and fluctuations between photons and charged particles at forward rapidity at RHIC

2 February 8, 2008 Sunil Dogra QM2008 Jaipur 2 Motivation  Inclusive photons provide the information of production of    Chiral symmetry restoration could be reflected via study of Photon- Charged particles Fluctuations.  Formation of Disoriented Chiral Condensates (DCC) generate fluctuations between photons and charged particles.  DCC formation is expected to provide information on the vacuum structure of strong interaction and chiral phase transition. Anti-CENTAURO event of JACEE 36 photons, 1 charged particle

3 February 8, 2008 Sunil Dogra QM2008 Jaipur 3 STAR Experiment Nucl.Instrum.Meth.A499: ,2003  Coverage: 2.3< |  < 4.0  Event-by-event number of charged particles  Spatial distribution ( ,  ) ‏ and p T of charged particles Coverage: |  < 1.5 Nucl.Instrum.Meth A 499, 713 (2003)

4 February 8, 2008 Sunil Dogra QM2008 Jaipur 4 Photon Multiplicity Detector  Two planes CPV+Preshower  Gas detector of hexagonal cells  Cell cross section : 1.0 cm 2  Cell depth : 0.8 cm  Gas used: Ar+CO 2 in 70:30  Total number of cells : 82,944  Area of the detector : 4.2 m 2  Distance from vertex : 540 cm  Coverage: -2.3 to -3.8 in  with full  Nucl. Instrum. Meth. A 499, 751 (2003)‏

5 February 8, 2008 Sunil Dogra QM2008 Jaipur 5 Principle of Photon Multiplicity detector Photons passing through the converter initiate an electro-magnetic shower and produce large signal on several cells of the sensitive volume of the detector. Hadrons normally affect only one cell and produce a signal representing minimum ionizing particles.

6 February 8, 2008 Sunil Dogra QM2008 Jaipur 6 This Analysis: clusters with N cells > 1 & Cluster ADC > 5*MIP (Purity ~ 67%)‏ Efficiency and Purity of Photon sample % Charged hadrons are rejected by using thresholds on strengths and number of cells on PMD clusters. Raising thresholds on cluster ADC increases purity of photon samples.

7 February 8, 2008 Sunil Dogra QM2008 Jaipur 7 Data Samples AuAu (200GeV) : 1.8 M events CuCu (200 GeV) : 320 K Event cuts: Zvertex <30 cm Photon samples (PMD): cluster ADC > 5 MIP No of cells > 1 Charged tracks (FTPC): dca < 2 cm, nHits > 5, 0.1< p T <3.0 GeV/c

8 February 8, 2008 Sunil Dogra QM2008 Jaipur 8 Cu+Cu 200 GeV Photons Charged Particles Minbias Distribution -----Top 10% Minbias Distribution -----Top 10% Number of Events Au+Au 200 GeV Photon and Charged Particle Multiplicities (Uncorrected)‏

9 February 8, 2008 Sunil Dogra QM2008 Jaipur 9 Study of photon-charged particles fluctuations (Methods)‏    / Mean of ratio (measuring the width)‏   dynamics (measure of total correlated fluctuations)‏

10 February 8, 2008 Sunil Dogra QM2008 Jaipur 10 Fluctuations in N   / N ch  2 /Mean) scaled by N part : almost constant with N part (approximate 1/N part scaling )‏....a+ 1/N part Error bars are Statistical part Measure of Fluctuations =  2 /Mean Error bars are Statistical

11 February 8, 2008 Sunil Dogra QM2008 Jaipur 11 Photon – Charged Particle Fluctuations by dynamics dynamics = Robust variable (almost independent of detector efficiency): (confirmed by Monte Carlo Toy Model)‏ Zero for Poisson-ian fluctuation Charge fluctuations Photon fluctuationsCorrelated fluctuations C. Pruneau et al. Phys. Rev. C 66, (2004)‏ Nystrand et at. Phys. Rev. C 68, (2003)

12 February 8, 2008 Sunil Dogra QM2008 Jaipur 12 Three Terms in dynamics Individual fluctuations are larger than correlation making dynamics positive

13 February 8, 2008 Sunil Dogra QM2008 Jaipur 13 Different cuts on photon samples: 3 MIP 4 MIP 5 MIP 6 MIP Effect of purity and efficiency variation Independent of MIP cuts

14 February 8, 2008 Sunil Dogra QM2008 Jaipur 14 dynamics similar at different  coverage (upstream material effect is small)‏ dynamics :Dependence of  Coverage

15 February 8, 2008 Sunil Dogra QM2008 Jaipur 15 Observation: dynamics scaled by N part : almost constant at lower N part and increases at higher N part Scaling of dynamics with N part

16 February 8, 2008 Sunil Dogra QM2008 Jaipur 16 p T dependence of fluctuations χ B. Mohanty, J Serreau Phys. Reports 414(2005) DCC particles are soft Signals expected to increase for lower pt First time access to p T dependence of charged particles (absent in WA98)‏

17 February 8, 2008 Sunil Dogra QM2008 Jaipur 17 No pT dependence on dynamics Small or No DCC signal? dynamics with p T cut of Charged Particles....a+ 1/N part Error bars are Statistical

18 February 8, 2008 Sunil Dogra QM2008 Jaipur 18 Summary  Photon and Charged particle multiplicity correlations are studied for AuAu & CuCu at 200 GeV Collisions at forward rapidities.  Two Method used:   /Mean and dynamics    /Mean of N   /N ch shows approximate 1/N part scaling   dynamics is positive (individual fluctuations > than correlated term)‏   part  *  dynamics almost constant at lower N part and increase for higher N part  No pt dependence -> No abnormal correlations, induced by DCC  An analysis to determine sensitivity of dynamics for DCC is ongoing