As one evolves the gluon density, the density of gluons becomes large: Gluons are described by a stochastic ensemble of classical fields, and JKMMW argue.

Slides:



Advertisements
Similar presentations
Exploring Hot Dense Matter at RHIC and LHC
Advertisements

Quarkonia: theoretical overview Marzia Nardi INFN Torino III Convegno Nazionale sulla Fisica di ALICE Frascati, Novembre 2007.
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.
1 Jet Structure of Baryons and Mesons in Nuclear Collisions l Why jets in nuclear collisions? l Initial state l What happens in the nuclear medium? l.
Initial and final state effects in charmonium production at RHIC and LHC. A.B.Kaidalov ITEP, Moscow Based on papers with L.Bravina, K.Tywoniuk, E.Zabrodin.
The Color Glass Condensate and RHIC Phenomenology Outstanding questions: What is the high energy limit of QCD? How do gluons and quarks arise in hadrons?
References to Study the New Matter. Study QGP in different Centrality Most Central events (highest multiplicity), e.g. top 5% central, i.e. 5% of the.
Xiaorong Wang, SQM Measurement of Open Heavy Flavor with Single Muons in pp and dAu Collisions at 200 GeV Xiaorong Wang for PHENIX collaboration.
Relativistic Heavy-Ion Collisions: Recent Results from RHIC David Hardtke LBNL.
1 D. Kharzeev Nuclear Theory BNL Alice Club, CERN TH, May 14, 2007 Non-linear evolution in QCD and hadron multiplicity predictions for the LHC.
Peter SteinbergISMD2003 Experimental Status of Parton Saturation at RHIC Peter Steinberg Brookhaven National Laboratory ISMD2003, Krakow, Poland 5-11 September.
Looking for intrinsic charm at RHIC and LHC University of São Paulo University of Pelotas F.S. Navarra V.P. Gonçalves Winter Workshop on Nuclear Dynamics.
Rene Bellwied Wayne State University 19 th Winter Workshop on Nuclear Dynamics, Breckenridge, Feb 8 th -15 th Strange particle production at the intersection.
Cold nuclear matter effects on dilepton and photon production Zhong-Bo Kang Los Alamos National Laboratory Thermal Radiation Workshop RBRC, Brookhaven.
Lecture II. 3. Growth of the gluon distribution and unitarity violation.
New States of Matter and RHIC Outstanding questions about strongly interacting matter: How does matter behave at very high temperature and/or density?
New perspective of QCD at high energy New perspective of QCD at high energy - introduction to Color Glass Condensate - Kazunori Itakura Service de Physique.
Carl Gagliardi – QCD at High Energy/Small x 1 QCD at High Energy/Small x Experimental Overview Outline What do we know? Things to learn from the next RHIC.
Rapidity correlations in the CGC N. Armesto ECT* Workshop on High Energy QCD: from RHIC to LHC Trento, January 9th 2007 Néstor Armesto Departamento de.
A NLO Analysis on Fragility of Dihadron Tomography in High Energy AA Collisions I.Introduction II.Numerical analysis on single hadron and dihadron production.
Initial State and saturation Marzia Nardi INFN Torino (Italy) Quark Matter 2009, Knoxville Student Day.
1 Nov. 15 QM2006 Shanghai J.H. Lee (BNL) Nuclear Induced Particle Suppression at Large-x F at RHIC J.H. Lee Physics Department Brookhaven National Laboratory.
Working Group C: Hadronic Final States David Milstead The University of Liverpool Review of Experiments 27 experiment and 11 theory contributions.
The Color Glass Condensate Outstanding questions: What is the high energy limit of QCD? How do gluons and quarks arise in hadrons? What are the possible.
Glasma Definition: The matter which is intermediate between the Color Glass Condensate and the Quark Gluon Plasma It is not a glass, evolving on a natural.
R CP Measurement with Hadron Decay Muons in Au+Au Collisions at √s NN =200 GeV WooJin Park Korea University For the PHENIX Collaboration.
High Energy Nuclear Physics and the Nature of Matter Outstanding questions about strongly interacting matter: How does matter behave at very high temperature.
Luan Cheng (Institute of Particle Physics, Huazhong Normal University) I.Introduction II. Potential Model with Flow III.Flow Effects on Parton Energy Loss.
The CGC and Glasma: Summary Comments The CGC, Shadowing and Scattering from the CGC Inclusive single particle production J/Psi Two Particle Correlations.
Ultra-relativistic heavy ion collisions Theoretical overview ICPAQGP5, KOLKATA February 8, 2005 Jean-Paul Blaizot, CNRS and ECT*
Overview of saturation Yoshitaka Hatta (Saclay) Low-x meeting, 2007, Helsinki.
1 QCD evolution equations at small x (A simple physical picture) Wei Zhu East China Normal University KITPC A simple physical picture.
Diffractive structure functions in e-A scattering Cyrille Marquet Columbia University based on C. Marquet, Phys. Rev. D 76 (2007) paper in preparation.
Relativistic Heavy Ion Collider and Ultra-Dense Matter.
Forward particle production in d+Au collisions in the CGC framework Cyrille Marquet Institut de Physique Théorique, CEA/Saclay.
Marzia Nardi CERN – Th. Div. Hadronic multiplicity at RHIC and LHC Hadronic multiplicity at RHIC and LHC Korea-EU ALICE Collab. Oct. 9, 2004, Hanyang Univ.,
Presentation for NFR - October 19, Trine S.Tveter Recent results from RHIC Systems studied so far at RHIC: - s NN 1/2 = 
Seminários GFPAE – 02/ Diffractive heavy quark production at the LHC Mairon Melo Machado
CGC Glasma Initial Singularity sQGPHadron Gas Theory Summary* QM 2006 Shanghai, China Art due to Tetsuo Hatsuda and Steffen Bass (with some artistic interpretation)
2/10/20161 What can we learn with Drell-Yan in p(d)-nucleus collisions Feng Yuan Lawrence Berkeley National Laboratory RBRC, Brookhaven National Laboratory.
07/27/2002Federica Messer High momentum particle suppression in Au-Au collisions at RHIC. Federica Messer ICHEP th international Conference on high.
BFKL equation at finite temperature Kazuaki Ohnishi (Yonsei Univ.) In collaboration with Su Houng Lee (Yonsei Univ.) 1.Introduction 2.Color Glass Condensate.
The Color Glass Condensate and Glasma What is the high energy limit of QCD? What are the possible form of high energy density matter? How do quarks and.
Color Glass Condensate in High Energy QCD Kazunori Itakura SPhT, CEA/Saclay 32 nd ICHEP at Beijing China 16 Aug
STAR azimuthal correlations of forward di-pions in d+Au collisions in the Color Glass Condensate Cyrille Marquet Institut de Physique Théorique, CEA/Saclay.
QM2008 Jaipur, India Feb.4– Feb. 10, STAR's Measurement of Long-range Forward- backward Multiplicity Correlations as the Signature of “Dense Partonic.
Implications for LHC pA Run from RHIC Results CGC Glasma Initial Singularity Thermalized sQGP Hadron Gas sQGP Asymptotic.
Azimuthal correlations of forward di-hadrons in d+Au collisions at RHIC Cyrille Marquet Theory Division - CERN Based on :C.M., Nucl. Phys. A796 (2007)
Elliptic Flow and Jet Quenching at RHIC Ghi R. Shin Andong National University J.Phys G. 29, 2485/JKPS 43, 473 Him 2006 May Meeting.
Theory at the RIKEN/BNL Research Center initial state "Glasma" "Quark-Gluon Plasma" hadrons Cartoon of heavy ion collisions at high energy: (Now: RHIC.
Peter SteinbergISMD2003 Experimental Status of Parton Saturation at RHIC Peter Steinberg Brookhaven National Laboratory Forward RHIC October.
1 Small x and Forward Physics in pp/pA at RHIC STAR Forward Physics FMS Steve Heppelmann Steve Heppelmann Penn State University STAR.
Universal Aspects of the Dipole Cross Section in eA and pA Collisions Jamal Jalilian-Marian Institute for Nuclear Theory University of Washington.
(di)-Hadron Production in d+Au Collisions at RHIC Mickey Chiu.
Quark Pair Production in the Color Glass Condensate Raju Venugopalan Brookhaven National Laboratory RBRC Heavy Flavor Workshop, Dec. 12th-14th, 2005.
Centre de Physique Théorique
Computing gluon TMDs at small-x in the Color Glass Condensate
Multiple parton interactions in heavy-ion collisions
Forward correlations and the ridge - theory
Physics with Nuclei at an Electron-Ion Collider
DIFFRACTION 2010, Sep , Otranto, Italy
Color Glass Condensate : Theory and Phenomenology
Modification of Fragmentation Function in Strong Interacting Medium
Forward particle production in the presence of saturation
Masanori HIRAI 2006, Nov 9, Tokyo-u
Computing gluon TMDs at small-x in the Color Glass Condensate
New d+Au RHIC data show evidence for parton saturation
A prediction of unintegrated parton distribution
of Hadronization in Nuclei
Hadron Multiplicity from Color Glass Condensate at LHC
Presentation transcript:

As one evolves the gluon density, the density of gluons becomes large: Gluons are described by a stochastic ensemble of classical fields, and JKMMW argue there is a renormalization group description In target rest frame: Fast moving particle sees classical fields from various longitudinal positions as coherently summed In infinite momentum frame, these fields are Lorentz contracted to sit atop one another and act coherently Density per unit rapidity is large Saturation: The Color Glass Condensate,Glasma and RHIC Mueller and Qiu, Nucl. Phys. B268, 427 (1986) L. Gribov, Levin and Ryskin, Phys. Rept. 100, 1 (1983) McLerran & Venugopalan, Phys. Rev. D49, 2233 (1994); 3352 (1994) Total of 4222 citations

Leads to name for the saturated gluon media of Color Glass Condensate: Color: Gluon Color Glass: V. Gribov’s space time picture of hadron collisions Condensate: Coherence due to phase space density Derivation JIMWLK evolution equations that for correlators is BK equation The theoretical description overlaps: Perturbative QCD at large momenta (low density) Includes the Pomeron and Multi-Reggeon configurations of Lipatov In various approximations, “Pomeron loop” effects can be included. Theoretical issue is not more when the approximations used are valid, not whether framework is valid

CGC Gives Initial Conditions for QGP in Heavy Ion Collisions Longitudinal electric and magnetic fields are set up in a very short time Bjorken Phys.Rev.D27: , Cites

Experimental Evidence: ep Collisions Computed saturation momentum dependence on x agrees with data Simple explanation of generic feature of data Allows an extraction of saturation momentum

Experimental Evidence: ep Collisions Diffraction

Experimental Evidence: ep Collisions But there exist other non-saturation interpretations. Are there really no or even a negative number of “valence gluons” in the proton for small x?

Saturation and Nuclei: Multiplicity Increasing A corresponds to decreasing x, or increasing energy Early results on multiplicity: Saturation based models predicted the centrality and energy dependence of the data

Extended Scaling: Large x parton (projectile) sees saturated disk of low x partons from target: Partons up to saturation scale are stripped from projectile. Approximate scaling well described in CGC Important for renormalization group description of CGC

Single Particle Distributions in dA Collisions: Two effects: Multiple scattering: more particles at high pT CGC modification of evolution equations => less particles It also includes DGLAP and BFKL evolution Upper Curves: Ratio of deuteron gold to pp distribution as function of transverse momentum for various x values Lower Curves: Same plot for initial state modifications for the ratio of gold-gold to pp

Only CGC correctly predicted suppression at forward rapidity and suppression with increasing centrality seen in Brahms, Phenix and Star Leading twist gluon shadowing does NOT describe the Brahms data! Non-leading twist at small x is saturation. Single Particle Distributions in dA Collisions:

J/Psi Production in dA and AA

Can be interpreted as nuclear absorption but with a strong rapidity dependence and huge cross section in forward region CGC: If saturation momentum exceeds charms quark mass, then charm is similar to a light mass quark: Feynman scaling and cross section like Good intuitively plausible description of data

Two Particle Correlations If the relative momentum between two particles is large, the two particle correlation must is generated at a time t ~ 1/p STAR Forward Backward Correlation Correlations measured for fixed reference multiplicity and then are put into centrality bins Correlation is stronger for more central collisions and higher energy

Impact parameter correlation give b = 0.16 Most central highest energy correlation strength exceeds upper bound of 0.5 from general considerations Long-range correlation from Glasma flux Short-range from higher order corrections Glasma provides qualitatively correct description, and because of long range color electric and magnetic flux Two Particle Correlations

The Ridge Two Particle Correlations

In perturbative QCD, there is in addtion to the high $p_T$ jet, a “beam fragmentation jet” caused by image charges Glasma includes perturbative QCD processes for hard ridge Multiple Pomeron emission: In non saturated region Lipatov hard Pomeron CGC includes Lipatov hard Pomeron, but also allows one to extend to dense region for inclusive ridge Two particle correlation is suppressed by relative to inclusive production. Need a color correlation! Two Particle Correlations

Decay of Lines of Flux: Long range in rapidity Narrow in angle due to flow Hydro gives “mach cone” structure Hydro-studies Blastwave Beam jet fragmentation in perturbative QCD, Glasma “flux tube” Pomeron decays Glasma description is inclusive Jet quenching CAN NOT explain the long range rapidity correlation!

“Jet Quenching” in dA Collisions: Forward backward angular correlation between forward produced, and forward-central produced particles Conclusive evidence that the CGC is a medium! 200 GeV p+p and d + Au Collisions Run8, STAR Preliminary pp d+Au (peripheral)d+Au (central)

“Jet Quenching” in dA Collisions: Forward backward angular correlation between forward produced, and forward-central produced particles STAR and PHENIX PHENIX data is well described by the saturation based computation. Two Particle Correlations

Positively charged particles Negatively charged particles Topological Charge Changing Processes and Event by Event P and CP Violation Glasma generates a large topological charge density. Perhaps the observed “P and CP Violating fluctuations” due to topological charge fluctuations? Do these arise from the Glasma?

Conclusion: Large number of tests of saturation hypothesis: Experimental results from Brahms, Phenix, Phobos and Star are consistent with that predicted for Color Glass Condensate and Glasma Most recent data: dA Correlations: There is a saturated media present in the initial wavefunction of the nucleus that is measured in the two particle correlations of PHENIX (and STAR). The Ridge: In the collisions of two nuclei, “flux tube” structures are formed and are imaged in the STAR, PHOBOS and PHENIX. They are well described as arising from a Glasma produced in the collisions of sheets of Colored Glass Condensate. Question: Is it “strongly” or weakly coupled? The accumulated data from RHIC provides compelling confirmation of the CGC hypothesis for gluon saturation