N. N. Ajitanand Nuclear Chemistry, SUNY Stony Brook For the PHENIX Collaboration RHIC & AGS Users Meeting June 7-11 2010 Investigation of Parity Violation.

Slides:



Advertisements
Similar presentations
Highlights from STAR at RHIC
Advertisements

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?
Flow workshop, BNLShinIchi Esumi, Tsukuba1 Charged particle v2 and azimuthal pair correlation with respect to the reaction plane at PHENIX ShinIchi Esumi.
1 A novel method of looking for the parity violation signal N. N. Ajitanand (SUNYSB Nuclear Chemistry) for the PHENIX Collaboration Joint CATHIE/TECHQM.
, CZE ISMD2005 Zhiming LI 11/08/ and collisions at GeV Entropy analysis in and collisions at GeV Zhiming LI (For the NA22 Collaboration)
Spontaneous Parity Violation in Strong Interactions Dhevan Gangadharan (UCLA) On behalf of the STAR Collaboration WWND
1 How to measure flow and the reaction plane? N. N. Ajitanand Nuclear Chemistry, SUNY, Stony Brook.
R. Lacey, SUNY Stony Brook PHENIX Measurements of Anisotropic Flow in Heavy-Ion Collisions at RHIC Energies 1 Nuclear Chemistry Group, SUNY Stony Brook,
Henrik Tydesjö May O UTLINE - The Quark Gluon Plasma - The Relativistic Heavy Ion Collider (RHIC) The PHENIX Experiment - QGP Signals Event-by-Event.
Henrik Tydesjö March O UTLINE - The Quark Gluon Plasma - The Relativistic Heavy Ion Collider (RHIC) - The PHENIX Experiment - Event-by-Event Net-Charge.
January 12, 2007J. Sandweiss Two Important Long Range Programs for RHIC In addition to the many important RHIC research programs that are currently underway.
 Transverse Polarization in STAR Au-Au Collisions Polarization definition and models E896 results STAR analysis STAR results Significance of results Future.
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.
Gang Wang (WWND2010)1 Search for local parity violation with STAR ZDC-SMD Gang Wang (UCLA) for STAR Collaboration.
Charge Asymmetry Correlations Searching for Local Parity Violation Quan Wang, Purdue For STAR Collaboration.
Measurement of Charge Asymmetry Correlations in Heavy Ion Collisions Quan Wang, Purdue For STAR Collaboration 111/4/2010DNP 2010.
Sourav Tarafdar Banaras Hindu University For the PHENIX Collaboration Hard Probes 2012 Measurement of electrons from Heavy Quarks at PHENIX.
R. Lacey, SUNY Stony Brook The PHENIX Flow Data: Current Status Justin Frantz (for T.Todoroki) Ohio University WWND 15 Keystone, CO 1 (Filling in For Takahito.
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.
Υ Measurements at PHENIX Shawn Whitaker RHIC/AGS Users’ Meeting June 20, /20/20111Shawn Whitaker - RHIC/AGS Users Meeting.
Nov 2001 Craig Ogilvie 1 Angular Correlations at High pt: Craig Ogilvie for the Phenix Collaboration Energy-loss: increased medium-induced gluon-radiation.
Photon-Jet Correlations at RHIC Saskia Mioduszewski Texas A&M University 19 June, 2007.
PHENIX Fig1. Phase diagram Subtracted background Subtracted background Red point : foreground Blue point : background Low-mass vector mesons (ω,ρ,φ) ~
Tomoaki Nakamura - Hiroshima Univ.16/21/2005 Event-by-Event Fluctuations from PHENIX Tomoaki Nakamura for the PHENIX collaboration Hiroshima University.
1 Search for effects related to Chiral Magnetic Wave at STAR Gang Wang (UCLA) for STAR Collaboration.
Winter Workshop on Nuclear Dynamics Jet studies in STAR via 2+1 correlations Hua Pei For the STAR Collaboration.
1 Realistic top Quark Reconstruction for Vertex Detector Optimisation Talini Pinto Jayawardena (RAL) Kristian Harder (RAL) LCFI Collaboration Meeting 23/09/08.
 Production at forward Rapidity in d+Au Collisions at 200 GeV The STAR Forward TPCs Lambda Reconstruction Lambda Spectra & Yields Centrality Dependence.
N. N. Ajitanand Nuclear Chemistry, SUNY, Stony Brook For the PHENIX Collaboration Two and Three particle Flavor Dependent Correlations Remember the hungarian.
M. Issah QM04 1 Azimuthal Anisotropy Measurements in PHENIX via Cumulants of Multi-particle Azimuthal Correlations Michael Issah (SUNY Stony Brook ) for.
Higher harmonics flow measurement of charged hadrons and electrons in wide kinematic range with PHENIX VTX tracker Maki KUROSAWA for PHENIX collaboration.
Hadron Collider Physics 2012, 12/Nov/2012, KyotoShinIchi Esumi, Univ. of Tsukuba1 Heavy Ion results from RHIC-BNL ShinIchi Esumi Univ. of Tsukuba Contents.
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.
Measurement of J/  -> e + e - and  C -> J/  +   in dAu collisions at PHENIX/RHIC A. Lebedev, ISU 1 Fall 2003 DNP Meeting Alexandre Lebedev, Iowa State.
M. Muniruzzaman University of California Riverside For PHENIX Collaboration Reconstruction of  Mesons in K + K - Channel for Au-Au Collisions at  s NN.
Measurement of photons via conversion pairs with PHENIX at RHIC - Torsten Dahms - Stony Brook University HotQuarks 2006 – May 18, 2006.
Chiral symmetry breaking and Chiral Magnetic Effect in QCD with very strong magnetic field P.V.Buividovich (ITEP, Moscow, Russia and JIPNR “Sosny” Minsk,
Azimuthal HBT measurement of charged pions With respect to 3 rd event plane In Au+Au 200GeV collisions at RHIC-PHENIX Takafumi Niida for the PHENIX Collaboration.
Correlations and Fluctuations in Relativistic Nuclear Collisions, Florence, Italy, July Joakim Nystrand Measures of charged particle fluctuations.
 Measurement of  x E  (Fig. 4) Assorted correlations between a fixed high-p T trigger hadron (  p Ttrig  =4.7GeV/c) and lower p T associated hadrons.
Search for Chiral Magnetic Effects in High-Energy Nuclear Collisions
Dhevan Gangadharan (for the STAR Collaboration) Postdoctoral Researcher at CERN--Ohio State University.
Roy A. Lacey, Stony Brook University; QM11, Annecy, France 2011.
Oct. 12, 2007 Imran Younus k T Asymmetry in Longitudinally Polarized p +p Collisions at PHENIX.
Hadronic resonance production in Pb+Pb collisions from the ALICE experiment Anders Knospe on behalf of the ALICE Collaboration The University of Texas.
Measurement of photons via conversion pairs with the PHENIX experiment at RHIC - Torsten Dahms - State University of New York at Stony Brook for the PHENIX.
1 1. Characteristics of the Medium 2. Jet-medium interactions  Extraction of jet functions 3. Summary of few things learned “Any man who knows all the.
Kirill Filimonov, ISMD 2002, Alushta 1 Kirill Filimonov Lawrence Berkeley National Laboratory Anisotropy and high p T hadrons in Au+Au collisions at RHIC.
Wolf G. Holzmann (SUNY Stony Brook) for the PHENIX Collaboration Angular Correlation Studies in PHENIX Wolf G. Holzmann for the Collaboration.
Measurement of photons via conversion pairs with the PHENIX experiment at RHIC - Torsten Dahms - Master of Arts – Thesis Defense Stony Brook University.
Study of Charged Hadrons in Au-Au Collisions at with the PHENIX Time Expansion Chamber Dmitri Kotchetkov for the PHENIX Collaboration Department of Physics,
Dhevan Gangadharan UCLA STAR Collaboration DNP meeting 10/25/08 1.
Global and Collective Dynamics at PHENIX Takafumi Niida for the PHENIX Collaboration University of Tsukuba “Heavy Ion collisions in the LHC era” in Quy.
PHENIX. Motivation Collaboration PHENIX Roy A. Lacey (SUNY Stony Brook) PHENIX Collaboration I N T E R N A T I O N A L W O R K S H O P O N T H E P H.
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.
Richard Petti For the PHENIX Collaboration
Tatia Engelmore, Columbia University
Takafumi Niida from Univ. of Tsukuba for the PHENIX Collaborations
Takafumi Niida from Univ. of Tsukuba for the PHENIX Collaborations
Scaling Properties of Fluctuation and Correlation Results from PHENIX
ShinIchi Esumi, Univ. of Tsukuba
The Study of Elliptic Flow for PID Hadron at RHIC-PHENIX
kT Asymmetry in Longitudinally Polarized pp Collisions
ShinIchi Esumi, Univ. of Tsukuba
Third DNP/JPS Joint Meeting, 14th October 2009
Stony Brook University
ShinIchi Esumi, Univ. of Tsukuba
Hiroshi Masui For the PHENIX Collaboration Quark Matter 2004
Hiroshi Masui / Univ. of Tsukuba
Presentation transcript:

N. N. Ajitanand Nuclear Chemistry, SUNY Stony Brook For the PHENIX Collaboration RHIC & AGS Users Meeting June Investigation of Parity Violation at RHIC with the PHENIX Detector

2 Local Parity Violation at RHIC It has been proposed [1] that in heavy ion collisions, metastable domains may be created in which parity and CP symmetries are violated. A combination of a net chirality of quarks within a domain and the extremely strong magnetic field in a heavy ion collision could lead to the manifestation of parity violation as a separation of charges along the angular momentum vector of the collision system [2]. 1.D. Kharzeev, R. D. Pisarski, and M. H. G. Tytgat, Phys. Rev. Lett. 81, 512 (1998). 2.D. Kharzeev and R. D. Pisarski, Phys. Rev. D 61, (2000). L or B N. N. Ajitanand RHIC-AGS 2010

3 Azimuthal distribution w.r.t the reaction plane N(φ ) = N 0 (1+2v 2 cos(2φ)+2v 4 cos(4φ)+ 2a 1 sin(φ)) Charge seperation along B field results from parity breaking term a 1 Charge seperation along B field results from parity breaking term a 1 a 1 < a 1 > Ψ RP B B Positive charges favor BNegative charges favor B Ψ RP φ φ Detection of azimuthal charge-asymmetry is a pre-requisite for evidence of Parity Violation a pre-requisite for evidence of Parity Violation

4 Mid Reaction Plane 1.0<|η|<2.8, 0<φ<2π Reaction Plane Detector (RXN) Charged Particle Tracks |η|<0.35, π/2 x 2 arms Central Arm Spectrometer (DC,PCs) Charge asymmetry determined for azimuthal distribution of charged hadrons in the central arms w.r.t Reaction Plane determined by RXN

5 The two-particle correlation – an extension of the STAR method Proposed and used by ShinIchi Esumi

6 Two-particle correlation Method Reactio n Plane X Y acceptance correction accounted for acceptance correction accounted for with event mixing reaction plane resolution correction L or B Reaction plane v 1 = 0, B in ≈ B out Averaging is performed over all pairs in a given event and then over all events with a given centrality Signal proportional to square of ‘a1’

7 Two-particle correlation Method (50, 49, 48, …) x  /50 L or B (1, 2, 3, …) x  /50 Event mixing in centrality: 10 bins [0-100%] z-vertex: 10 bins [-30~30cm] reaction plane: 50 bins [  ] Technical details for experimentalists M ixed event within the same event class of (cent, z-vtx, R.P.) in order to take into account the acceptance as well as residual flow effects to be removed. M easure F AB = and for F , F   and F  for both real and mixed events T ake a difference between real and mixed, then correct for R.P. resolution: (F real -F mixed ) / Res R.P.

8 Two-particle correlation Results Signal is sensitive to collision centrality N. N. Ajitanand RHIC-AGS 2010

9 Two-particle correlation Results Signal grows with centrality and p T N. N. Ajitanand RHIC-AGS 2010

10 Two-particle correlation Results Relatively good agreement between PHENIX & STAR N. N. Ajitanand RHIC-AGS 2010

11 A new multi-particle correlation method Proposed and used by N. N. Ajitanand

p positives n negatives p n---- Event with p positively charged hadrons and n negatively charged hadrons Multi-particle correlation: Construction of mixed event 1 2p p random choices n remaining 4 n ---- Construction of statistically matched mixed event

13 Evaluate real event averages of S = average S over the p positively charged hadrons in the event = average S over the n negatively charged hadrons in the event = average S over n remaining hadrons in the same event = average S over p randomly chosen hadrons in the same event Evaluate mixed event averages of S The new multi-particle correlator

14 Properties of C p SS N (Blue points) (Red points) Numerator shifted to the right C p shows positive slope a 1 > 0 in all events Simulated Results Cp SS N. N. Ajitanand RHIC-AGS 2010

15 Properties of C p a 1 < 0 in all events (Blue points) (Red points) Numerator shifted to the left C p shows negative slope Simulated Results SS N CpCp SS N. N. Ajitanand RHIC-AGS 2010

16 Properties of C p a 1 changes sign from event to event (Blue points) (Red points) Numerator slightly broader C p concave and symmetric Simulated Results SS N CpCp SS N. N. Ajitanand RHIC-AGS 2010

17 Properties of C p Simulated Results CpCp SS C p is an in-event correlator  Several benefits Flow : Yes Parity violating signal : No Decay : No Flat response to flow SS CpCp Jet : Yes Parity violating signal : No Decay : No Flat response to jets C p insensitive to flow and jets

CpCp SS 18 Properties of C p Simulated Results C p is an in-event correlator  Several benefits Flow : Yes Parity violating signal : Yes Decay : No Concave response to parity violation Flow : Yes Parity violating signal : N o Decay : Yes Convex response to decays CpCp SS N. N. Ajitanand RHIC-AGS 2010

19 Multi-particle correlation Results Concave shape validates charge asymmetry

20N. N. Ajitanand RHIC-AGS 2010 Concavity also observed for more central events Simulation fits favor a lower value of a1

21 Summary PHENIX measurements of azimuthal charge- asymmetry presented for two separate methods PHENIX measurements of azimuthal charge- asymmetry presented for two separate methods  Azimuthal charge-asymmetry observed by both methods  Extracted signals in general agreement with STAR N. N. Ajitanand RHIC-AGS 2010