QM2006 2006 年 11 月 14-21 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 1 For The 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions.

Slides:



Advertisements
Similar presentations
1 The and -Z Exchange Corrections to Parity Violating Elastic Scattering 周海清 / 东南大学物理系 based on PRL99,262001(2007) in collaboration with C.W.Kao, S.N.Yang.
Advertisements

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.
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.
Effects of minijet degradation on hadron observables in heavy-ion collisions Lilin Zhu Sichuan University QPT2013, Chengdu.
Orbital Momentum Effects in Heavy Ion and Hadron Collisions Sergey Troshin, IHEP, Protvino.
J/  nuclear modification factor in nucleus-nucleus collisions Xiao-Ming Xu.
We distinguish two hadronization mechanisms:  Fragmentation Fragmentation builds on the idea of a single quark in the vacuum, it doesn’t consider many.
Luan Cheng (Institute of Particle Physics, Huazhong Normal University) I. Introduction II. Interaction Potential with Flow III. Flow Effects on Light Quark.
Workshop on Quark-gluon Thermalization Vienna, August 10-12, 2005 In collaboration with Zuo-tang Liang Xin-Nian Wang/LBNL Thermalization and Globally Polarized.
 Transverse Polarization in STAR Au-Au Collisions Polarization definition and models E896 results STAR analysis STAR results Significance of results Future.
DPG spring meeting, Tübingen, March Kai Schweda Lawrence Berkeley National Laboratory for the STAR collaboration Recent results from STAR at RHIC.
Gluon Propagator and Static Potential for a heavy Quark-antiquark Pair in an Anisotropic Plasma Yun Guo Helmholtz Research School Graduate Days 19 July.
THE DEEP INELASTIC SCATTERING ON THE POLARIZED NUCLEONS AT EIC E.S.Timoshin, S.I.Timoshin.
Enke Wang (Institute of Particle Physics, Huazhong Normal University) with A. Majumder, X.-N. Wang I. Introduction II.Quark Recombination and Parton Fragmentation.
Anomaly of over ratios in Au+Au collision with jet quenching Xiaofang Chen IOPP, CCNU Collaborator: Enke Wang Hanzhong Zhang Benwei Zhang Beijing Mar.
Pornrad Srisawad Department of Physics, Naresuan University, Thailand Yu-Ming Zheng China Institute of Atomic Energy, Beijing China Azimuthal distributions.
, CCASTQinghua Xu, Shandong University1 Spin effects in fragmentation processes at RHIC Qinghua Xu ( 徐庆华 ) Physics department, Shandong University.
2010/4/18 1 南昌 Correlation between event multiplicity and observed collective flow 周代梅 华中师范大学粒子物理研究所.
Flow fluctuation and event plane correlation from E-by-E Hydrodynamics and Transport Model LongGang Pang 1, Victor Roy 1,, Guang-You Qin 1, & Xin-Nian.
June 28th 2007SQM2007 Levoca1 What can we learn from Spin? O. Villalobos Baillie School of Physics and Astronomy The University of Birmingham.

Columbia University Christine Aidala September 4, 2004 Solving the Proton Spin Crisis at ISSP, Erice.
Effect of thermal fluctuation of baryons on vector mesons and low mass dileptons ρ ω Sanyasachi Ghosh (VECC, Kolkata, India)
Luan Cheng (Institute of Particle Physics, Huazhong Normal University) I.Introduction II. Potential Model with Flow III.Flow Effects on Parton Energy Loss.
Orbital Angular Momentum and Shear Flow in Non-Central Heavy Ion Collisions Wei-Tian Deng.
09/15/10Waye State University1 Elliptic Flow of Inclusive Photon Ahmed M. Hamed Midwest Critical Mass University of Toledo, Ohio October, 2005 Wayne.
Jim Stewart DESY Measurement of Quark Polarizations in Transversely and Longitudinally Polarized Nucleons at HERMES for the Hermes collaboration Introduction.
Anisotropic flow, Azimuthal Balance Function, and Two-charged-particle Azimuthal Correlations in RQMD and AMPT We are very grateful to Zhixu Liu and Jiaxin.
The Quark Structure of the Nucleon Inti Lehmann & Ralf Kaiser University of Glasgow Cosener’s House Meeting 23/05/2007 Nucleon Structure Generalised Parton.
Measurements with Polarized Hadrons T.-A. Shibata Tokyo Institute of Technology Aug 15, 2003 Lepton-Photon 2003.
NPD-2009 Conference, ITEP, Moscow, November , Spin structure of the “forward” charge exchange reaction n + p  p + n and the deuteron.
Transverse Single-Spin Asymmetries Understanding the Proton: One of the fundamental building blocks of ordinary matter! Spin decomposition of proton still.
PHOTONS AND EVOLUTION OF A CHEMICALLY EQUILIBRATING AND EXPANDING QGP AT FINITE BARYON DENSITY Shanghai Institute of Applied Physics Jiali Long, Zejun.
Probing the properties of dense partonic matter at RHIC Y. Akiba (RIKEN) for PHENIX collaboration.
Heavy Quark Energy Loss due to Three-body Scattering in a Quark- Gluon Plasma Wei Liu Texas A&M University  Introduction  Heavy quark scattering in QGP.
Directed flow as an effect of the transient state rotation in hadron and nucleus collisions S.M. Troshin, N.E. Tyurin IHEP, Protvino.
High-p T Particles and RHIC Paradigm of Jet Quenching Ahmed M. Hamed NN2012 The 11 th International Conference on Nucleus-Nucleus Collisions 1.
Near-side  correlations of high-p t hadrons from STAR Jörn Putschke for the STAR collaboration Lawrence Berkeley National Laboratory Weisshorn (4505m),
Wuhan Workshop 2008 年 5 月 日 Wuhan 梁作堂 (Liang Zuo-tang) 山东大学 1 International Workshop on Heavy Ion Physics at LHC Global Polarization of QGP in AA.
1 Diffractive heavy quark production in AA collisions at the LHC at NLO* Mairon Melo Machado GFPAE – IF – UFRGS
Hyperon Polarization in Heavy ion Collisions C. C. Barros Jr. Universidade Federal de Santa Catarina Brasil Strangeness in Quark Matter 2013 University.
Strange Probes of QCD Matter Huan Zhong Huang Department of Physics and Astronomy University of California Los Angeles, CA Oct 6-10, 2008; SQM2008.
24 Nov 2006 Kentaro MIKI University of Tsukuba “electron / photon flow” Elliptic flow measurement of direct photon in √s NN =200GeV Au+Au collisions at.
Charm elliptic flow at RHIC B. Zhang 1, L.W. Chen 2, C.M. Ko 3 1 Arkansas State University, 2 Shanghai Jiao Tong University, 3 Texas A&M University Charm.
Kirill Filimonov, ISMD 2002, Alushta 1 Kirill Filimonov Lawrence Berkeley National Laboratory Anisotropy and high p T hadrons in Au+Au collisions at RHIC.
Enke Wang (Institute of Particle Physics, Huazhong Normal University) I. Introduction II. Ineraction Potential with Flow III.Flow Effects on Light Quark.
Enke Wang (Institute of Particle Physics, Huazhong Normal University) I.Jet Quenching in QCD-based Model II.Jet Quenching in High-Twist pQCD III.Jet Tomography.
Single-spin asymmetry of charm di-jet in longitudinally polarized pp collisions at STAR Introduction and motivation Reconstruction of W and Z signals Single-spin.
Intermediate pT results in STAR Camelia Mironov Kent State University 2004 RHIC & AGS Annual Users' Meeting Workshop on Strangeness and Exotica at RHIC.
NPD-2009 Conference, ITEP, Moscow, November , Possible effect of mixed phase and deconfinement upon spin correlations in the pairs.
Elliptic Flow of Inclusive Photon Elliptic Flow of Inclusive Photon Ahmed M. Hamed Midwest Critical Mass University of Toledo, Ohio Oct. 22,
J/  momentum distribution in heavy ion collisions at LHC Xiao-Ming Xu.
Fluctuations, Instabilities and Collective Dynamics L. P. Csernai 1 and H. Stöcker 2 1 Institute of Physics and Technology, University of Bergen, Allegaten.
Duke University 野中 千穂 Hadron production in heavy ion collision: Fragmentation and recombination in Collaboration with R. J. Fries (Duke), B. Muller (Duke),
Elliptic flow from initial states of fast nuclei. A.B. Kaidalov ITEP, Moscow (based on papers with K.Boreskov and O.Kancheli) K.Boreskov and O.Kancheli)
October 12, 2004 SPIN-2004, Trieste Spin Transfers in Polarized Hadronic Collisions (RHIC-Spin in mind) V. L. Rykov and K. Sudoh RIKEN.
SQM,UC Berkeley 27 June- 1July 2016
Electron Polarization effects in Compton X/γ-ray Sources
Heavy Quark Flow as Better Probes of QGP Properties
for STAR Collaboration
Johann Wolfgang Goethe-Universität Frankfurt
Modification of Fragmentation Function in Strong Interacting Medium
STAR Spin alignment of vector mesons (K*0, φ) in Au+Au and p+p collisions at RHIC Jin Hui Chen Shanghai Institute of Applied Physics and UCLA For the STAR.
Introduction Results Methods Conclusions
高能物理学会第八届全国会员代表大会暨学术年会
Single Spin Asymmetry with a Transversely Polarized
高能物理学会第七届全国会员代表大会暨学术年会
Effect of equilibrium phase transition on multiphase transport in relativistic heavy ion collisions 喻 梅 凌 华中师范大学粒子物理研究所 2019/2/24 第十届全国粒子物理大会 桂林.
of Hadronization in Nuclei
GLOBAL POLARIZATION OF QUARKS IN NON-CENTRAL A+A COLLISIONS
Presentation transcript:

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 1 For The 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2006) Globally polarized QGP in non-central AA collisions at high energies References: Z. Liang and X.N. Wang, Phys. Rev. Lett. 94, (2005); Phys. Lett. B629, 20 (2005); Gao Jian-hua et al, …… in preparation. Liang Zuo-tang Shandong University

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 2 Outline Introduction Global polarization of quarks and anti-quarks Direct consequences: I. Hyperon polarization II. Vector meson spin alignment Summary and outlook

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 3 Introduction  1989: Proton’s spin crisis;  Since 1970s: Hyperon polarization in unpolarized p+p/A  H+X;  Since 1970s: Single-spin left-right asymmetry in p(  )+p  +X;  Since 1970s: Spin analyzing power in p(  )+p  p+p;  Spin transfer in fragmentation process;  J/  polarization in p+p  J/  +X;  … … … Spin effects usually provide us with useful information on reaction mechanism and often surprises. Many examples … … … …

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 4 Introduction Do spin physics in AA collisions without polarizing A ? heavy ion collider polarized pp collider heavy ion physics spin physics spin physics in heavy ion collisions ? RHIC

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 5 Global Orbital Angular Momentum Y Huge orbital angular momentum of the colliding system. reaction plane: can be determined by measuring v 2 and v 1. normal of the reaction plane impact parameter - L y in unit of 10 5 b/R A

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 6 Global orbital angular momentum Gradient in p z -distribution along the x -direction x z impact parameter

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 7 Gradient in p z -distribution along x -direction Au+Au at 200AGeV p z ( x,b ) in unit of p 0 dp z \dx in unit of 2 p 0 \R A

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 8 Local Orbital Angular Momentum for b =R A,  x =1fm impact parameter of the two partons has a preferred direction ( ) !

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 9 Question Can such a local orbital angular momentum be transferred to the polarization of quark or anti-quark through the interactions between the partons in a QGP?

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 10 Quark scattering with fixed reaction plane Scattering amplitude in momentum space spin independent part Differential cross section w.r.t. the impact parameter spin dependent part Quark polarization after the scattering: a 2-dimensional Fourier transformation to impact parameter space average over the preferred directions

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 11 Qualitative results Static potential model with “small angle approximation” Both have exactly the same form ! Bessel functions QCD at finite temperature with HTL(hard thermal loop) gluon propagator scalar functions of x T spin direction of the quark after the scattering

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 12 Qualitative results has a preferred direction has a preferred direction a polarization of quark in the direction opposite to the normal of the reaction plane! normal of the AA -reaction plane

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 13 Quantitative results with QCD at finite temperature More details about the calculations will be given in the talk by Gao Jian-hua in Xi’An. - Quark polarization P q temperature

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 14 A new picture of QGP in non-central AA collisions The scattered quark acquires a negative polarization in the normal direction of the reaction plane! global polarization

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 15 Direct consequences Compare to: global polarization of quarks & anti-quarks polarization of hadrons hadronization OPAL  00 : probability for the third component of the spin of K* 0 to take zero.  00 =1/3: unpolarized In a non-central AA collision: Vector meson spin alignment

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 16 Consequence I: Hyperon polarization Recombination scenario q 1  + q 2  + q 3   H  Hyperon  PHPH PsPs P H in the case that P q = P s PqPq PqPq PqPq PqPq We expect In the case that

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 17 Consequence I: Hyperon polarization Fragmentation scenario q   H + X. Hyperon  PHPH P H in the case of P q =P s P H in the case of P q =P s and n s =f s

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 18 Consequence I: Hyperon polarization Some of the expected qualitative features The same for hyperons and anti-hyperons. (Approximately) the same for different hyperons. No polarization at b=0, increases approximately linearly with b.

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 19 Consequence II: Vector meson spin alignment In analog to Fragmentation scenario Recombination scenario

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 20 Experimental studies at RHIC See e.g., next talk. Also: special session at the Xi’An workshop.

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 21 Still many open questions More realistic calculations by taking longitudinal as well as transverse flows into account; Influence from final state interaction between hadrons; Influence of orbital angular momenta in hadronization; Relation to hyperon polarization w.r.t. production plane; Other measurable consequences; … … …

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 22 Summary A great advantage to study spin effects in non-central AA -collisions is: the reaction plane can be determined experimentally by measuring v 1 and v 2. There exists a huge orbital angular momentum of the colliding system w.r.t. the reaction plane. Quarks and anti-quarks are polarized in the opposite direction as the normal of the reaction plane due to spin-orbital interaction in QCD. Many consequences, many open questions … …

QM 年 11 月 日 Shanghai, China 梁作堂 (Liang Zuo-tang) 山东大学 23 Outlook ………………………  A possible method to study the role of orbital angular momentum in high energy spin physics.  An effective way to study spin-orbital interaction in QCD?  A new window to look at the properties of QGP? Thank you for your attention!