Peter Steinberg Universal Behavior of Charged Particle Multiplicities in Heavy-Ion Collisions Peter Steinberg Brookhaven National Laboratory for the PHOBOS.

Slides:

Advertisements

Similar presentations

ICHEP 2002, AmsterdamGerrit van Nieuwenhuizen/MIT Scaling of Charged Hadron p T distributions in Au+Au collisions at 200 GeV Gerrit van Nieuwenhuizen MIT.

Advertisements

Tokaj, Hungary, March 17, 2008Gábor VeresHigh-p T physics at the LHC, Tokaj ’08 1 Correlations with a high-p T trigger over a broad η range Gábor Veres.

Peter Steinberg PHOBOS The Landscape of Particle Production: Results from. Peter Steinberg Brookhaven National Laboratory SPS FNALRHICSppS AGS.

Gunther Roland - MITPHOBOS QM2005 Structure and Fine Structure of Hadron Production at RHIC Gunther Roland Massachusetts Institute of Technology New Results.

Gunther Roland - MITPHOBOS ISMD’05 3 Remarks on Fluctuations in Hadron Production at RHIC Gunther Roland Massachusetts Institute of Technology New Results.

Systematics of Soft Particle Production at RHIC: George S.F. Stephans Massachusetts Institute of Technology Lessons from (And some thoughts for the future)

S. Manly – U. Rochester Quark Matter, Budapest, Hungary - August System size, energy and  dependence of directed and elliptic flow Steven Manly.

Rachid Nouicer1 The Latest Results from RHIC Rachid NOUICER University of Illinois at Chicago and Brookhaven National Laboratory for the Collaboration.

S. Manly – U. Rochester Gordon Conf. 2006, New London, New Hampshire1 The simple geometric scaling of flow – perhaps it’s not so simple after all Steven.

June 5, 2002REU Seminar, University of Rochester1 Searching for a new form of matter on Long Island Steve Manly, University of Rochester 12 June, 2000:

S. Manly – U. Rochester Xi’an, China, Nov. 23, The eccentricities of flow S. Manly University of Rochester International Workshop on Hadron Physics.

Conor Henderson, MIT APS April 2001 Measurement Of Charged Antiparticle To Particle Ratios by the PHOBOS Experiment at RHIC Conor Henderson Massachusetts.

Charged particle multiplicity studies with PHOBOS Birger Back Argonne National Laboratory for the PHOBOS Collaboration.

Results from PHOBOS at RHIC David Hofman University of Illinois at Chicago For the Collaboration European Physical Society HEP2005 International Europhysics.

Multiplicity Fluctuations in 200 GeV Au-Au Collisions Zhengwei Chai Brookhaven National Laboratory for the Collaboration APS April Meeting, Denver, 2004.

1 - S. Manly, Univ. of Rochester APS - Washington D.C. - April 2001 Results from the PHOBOS experiment at RHIC Steve Manly (Univ. of Rochester) for the.

Gábor I. VeresQuark Matter 2006, Shanghai, November 14-20, Anti-particle to particle ratios in p+p, Cu+Cu and Au+Au collisions at RHIC Gábor I.

Update on flow studies with PHOBOS S. Manly University of Rochester Representing the PHOBOS collaboration Flow Workshop BNL, November 2003.

Femtoscopy BNL Workshop 6/21/2005George Stephans Very Low p T in x Past, Present, and Prospects.

Performance of the PHOBOS Trigger Detectors in 200 GeV pp Collisions at RHIC Joseph Sagerer University of Illinois at Chicago for the Collaboration DNP.

Wit Busza DoE Review of RHIC Program 9 July 2003.

Christof Roland/MITMoriond,March, Results from the PHOBOS experiment at RHIC Christof Roland (MIT) for the PHOBOS Collaboration.

Measuring Mid-Rapidity Multiplicity in PHOBOS Aneta Iordanova University of Illinois at Chicago For the collaboration.

Centrality measurement and the centrality dependence of dN charged /d  at mid-rapidity Judith Katzy (MIT) for the PHOBOS collaboration.

Birger Back/ANLBreckenridge, Feb 5-12, Recent results from PHOBOS Birger Back Argonne National Laboratory for the PHOBOS Collaboration.

Multiplicity as a measure of Centrality in Richard S Hollis University of Illinois at Chicago.

Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Charged Hadron p T Spectra from Au+Au at  s NN = 62.4 GeV Conor Henderson, MIT For the.

EPS Meeting AachenGerrit van Nieuwenhuizen Charged Particle Production in Au+Au at RHIC Gerrit van Nieuwenhuizen Massachusetts Institute of Technology.

Anti-particle to Particle Ratios in Cu+Cu RHIC Vasundhara Chetluru University of Illinois, Chicago For the collaboration Division of Nuclear.

Limiting Fragmentation Observations at Richard S Hollis University of Illinois at Chicago For the Collaboration.

Performance of PHOBOS Vertex Finders in 200GeV pp Collisions at RHIC Richard S Hollis University of Illinois at Chicago For the PHOBOS Collaboration Fall.

Phobos Collaboration and Management Wit Busza Phobos Technical Cost and Schedule Review November 1998.

Phobos at RHIC Edmundo Garcia University of Illinois at Chicago for the PHOBOS Collaboration IV Latin American Symposium on Nuclear Physics Mexico City.

Latest Results From PHOBOS David Hofman University of Illinois at Chicago.

Rachid Nouicer1 University of Illinois at Chicago and Brookhaven National Laboratory for the Collaboration Seminar at BNL November 14, 2003 The Latest.

RHIC PHENOMENOLOGY AS SEEN BY Wit Busza QCD in the RHIC Era UCSB, April 2002.

Charged Particle Multiplicity Measurement in 200 GeV pp Collisions with PHOBOS Joseph Sagerer University of Illinois at Chicago for the Collaboration DNP.

October 2005K.Woźniak TIME ‘ Vertex Reconstruction Algorithms in the PHOBOS Experiment at RHIC Krzysztof Woźniak for the PHOBOS Collaboration Institute.

Centrality Dependence of Charged Hadron Production at RHIC d+Au vs Au+Au Gunther Roland/MIT for the PHOBOS Collaboration BNL June 18, 2003.

Charged particle multiplicities from Cu+Cu, Au+Au and d+Au collisions at RHIC Richard S Hollis University of Illinois at Chicago detailed distribution:

Results from the Experiment at RHIC Abigail Bickley University of Maryland For the Collaboration Topics in Heavy Ion Collisions June 25-28, 2003, Montreal.

Recent Results from PHOBOS David Hofman – UIC For the Collaboration AGS/RHIC Users Meeting May 15-16, 2003, BNL.

(B) Find N part for d+Au collisions? 0-10%10-20%40-60%100-80% Aneta Iordanova University of Illinois at Chicago N part Determination and Systematic Studies.

1 1 Rachid Nouicer - BNL PHOBOS QM Energy and Centrality Dependence of Directed and Elliptic Flow in Au+Au and Cu+Cu Collisions at RHIC Energies.

PHOBOS WHITE PAPER REPORT Wit Busza on behalf of the PHOBOS Collaboration White paper report, June 2004.

RHIC results on cluster production in pp and heavy ion George S.F. Stephans Massachusetts Institute of Technology For the Collaboration.

Status of the Phobos experiment at RHIC S.Manly Univ. of Rochester ( for the Phobos Collaboration APS - Atlanta.

Spectrometer Based Ratio Analysis Technique Discussion of Corrections Absorption Correction – As the collision products pass through the detector, some.

Peter Steinberg Systematics of Charged Particle Production in 4  with the PHOBOS Detector at RHIC Peter A. Steinberg Brookhaven National Laboratory George.

For the Collaboration Charged Hadron Spectra and Ratios in d+Au and Au+Au Collisions from PHOBOS Experiment at RHIC Adam Trzupek The Henryk Niewodniczański.

S.Manly - RHIC Park City 3/00 Status of the Phobos experiment at RHIC S.Manly Univ. of Rochester ( for the.

For the Collaboration Low-p T Spectra of Identified Charged Particles in  s NN = 200 GeV Au+Au Collisions from PHOBOS Experiment at RHIC Adam Trzupek.

Gerrit J. van Nieuwenhuizen For the PHOBOS collaboration Experience & Upgrade RHIC future detectors R&D Workshop Brookhaven National Laboratory November.

1 1 Rachid Nouicer - BNL PHOBOS PANIC Global Observables from Au+Au, Cu+Cu, d+Au and p+p Collisions at RHIC Energies Rachid NOUICER Brookhaven National.

THE PHOBOS EXPERIMENT AT RHIC Judith Katzy for the PHOBOS Collaboration.

VERTEX2003, Low Hall, Cumbria The PHOBOS Detector “Design, Experience and Analysis” RUSSELL BETTS for The PHOBOS Collaboration.

Russell Betts (UIC) for the PHOBOS Collaboration Multiplicity Measurements with The PHOBOS Detector 18 th Winter Workshop on Nuclear Dynamics Nassau, Jan.

For the Collaboration Adam Trzupek The Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences Kraków, Poland The 2007 Europhysics.

How Strange is ? Current Results and Future Prospects George Stephans for the Phobos collaboration 24-July-Y2K Strangeness 2000 First RHIC Physics results!

1 V Latin American Symposium on Nuclear Physics Brasil, Setembro 2003 Edmundo García University of Illinois at Chicago for the PHOBOS collaboration Recent.

Hadron Spectra from Gábor I. Veres / MIT for the PHOBOS Collaboration.

Properties of charged-particle production at mid-rapidity for Au+Au collisions at RHIC Aneta Iordanova University of Illinois at Chicago.

Centrality Dependence of Charged Antiparticle to Particle Ratios from Abigail Bickley Univ. of Maryland, Chemistry Dept. for the Collaboration DNP, October.

Centrality Dependence of Charged Antiparticle to Particle Ratios Near Mid-Rapidity in d+Au Collisions at √s NN = 200 GeV Abigail Bickley Univ. of Maryland,

June 18, 2004BNL - Elliptic Flow, S. Manly1 Au-Au event in the PHOBOS detector Energy dependence of elliptic flow over a large pseudorapidity range in.

Particle production in nuclear collisions over a broad centrality range Aneta Iordanova University of Illinois at Chicago for the PHOBOS collaboration.

Conor Henderson, MIT Strangeness Production in PHOBOS Conor Henderson Massachusetts Institute of Technology For the PHOBOS Collaboration RHIC/AGS Users’

Collective flow with PHOBOS

Adam Trzupek The Henryk Niewodniczański Institute of Nuclear Physics

RHIC Physics Through the Eyes of PHOBOS

Presentation transcript:

Peter Steinberg Universal Behavior of Charged Particle Multiplicities in Heavy-Ion Collisions Peter Steinberg Brookhaven National Laboratory for the PHOBOS Collaboration ICHEP 2002 July 24-31, 2002, Amsterdam

Peter Steinberg Heavy-Ion Collisions Colliding Nuclei Hard Collisions Parton Cascade Hadron Gas & Freeze-out 1234 Entropy produced as system evolves Where does most of it come from? Initial, partonic or hadronic stage? Can we understand AA with simpler systems? VNI Simulations: Geiger, Longacre, Srivastava, nucl-th/

Peter Steinberg ARGONNE NATIONAL LABORATORYBirger Back, Alan Wuosmaa BROOKHAVEN NATIONAL LABORATORY Mark Baker, Donald Barton, Alan Carroll, Nigel George, Stephen Gushue, George Heintzelman, Burt Holzman, Robert Pak, Louis Remsberg, Peter Steinberg, Andrei Sukhanov INSTITUTE OF NUCLEAR PHYSICS, KRAKOWAndrzej Budzanowski, Roman Hołyński, Jerzy Michałowski, Andrzej Olszewski, Pawel Sawicki, Marek Stodulski, Adam Trzupek, Barbara Wosiek, Krzysztof Woźniak MASSACHUSETTS INSTITUTE OF TECHNOLOGYMaartin Ballintijn, Wit Busza (Spokesperson), Patrick Decowski, Kristjan Gulbrandsen, Conor Henderson, Jay Kane, Judith Katzy, Piotr Kulinich, Jang Woo Lee, Heinz Pernegger, Corey Reed, Christof Roland, Gunther Roland, Leslie Rosenberg, Pradeep Sarin, Stephen Steadman, George Stephans, Carla Vale, Gerrit van Nieuwenhuizen, Gábor Veres, Robin Verdier, Bernard Wadsworth, Bolek Wysłouch NATIONAL CENTRAL UNIVERSITY, TAIWANChia Ming Kuo, Willis Lin, Jaw-Luen Tang UNIVERSITY OF ILLINOIS AT CHICAGORussell Betts, Edmundo Garcia, Clive Halliwell, David Hofman, Richard Hollis, Aneta Iordanova, Wojtek Kucewicz, Don McLeod, Rachid Nouicer, Michael Reuter, Joe Sagerer UNIVERSITY OF MARYLANDAbigail Bickley, Richard Bindel, Alice Mignerey, Marguerite Belt Tonjes UNIVERSITY OF ROCHESTERJoshua Hamblen, Erik Johnson, Nazim Khan, Steven Manly, Inkyu Park, Wojtek Skulski, Ray Teng, Frank Wolfs Collaboration

Peter Steinberg PHOBOS : Centrality & Multiplicity   keV 500 Paddle Signal Events (monotonic w/ N part ) 4  Multiplicity Detector Participants Spectators b

Peter Steinberg PHOBOS Data on dN/d  Au+Au collisions at  s=19.6, 130, 200 GeV dN/d  for |  |<5.4 over full azimuth Centrality from paddles (130/200) & N hits (19.6) Top 50% of total cross section (N part ~65-360) dN/d     19.6 GeV 130 GeV200 GeV PHOBOS Preliminary N part Most Central

Peter Steinberg UA5 inelastic Seen in pp by UA GeV 200 GeV 546 GeV 900 GeV Plotting dN/d  vs. shows scaling behavior in the “forward” region  Limiting Fragmentation  =  - y beam dN/d  /  N part /2  19.6 data allows extrapolation to extract N ch PHOBOS Au+Au 19.6 GeV Preliminary 19.6 GeV 130 GeV 200 GeV Universal limiting distribution seen in both AA and pp Central 3%

Peter Steinberg Centrality Dependence of dN/d  Are these effects related? Long-range correlations? Energy conservation? Stopping? Other collision systems?  ’ ~ -5 Rises Saturation? 2-component?  ’ ~ -1.5 Stable Scaling  ’~ 1.5 Falls Cascading in spectators? Centrality Dependence InterpretationLocation 200 GeV 130 GeV 19.6 GeV dN/d  /  N part /2   =  - y beam

Peter Steinberg Rapidity Distributions at 200 GeV yTyT  Surprising agreement in shape between AA/e + e - /pp e + e - measures dN/dy T (rapidity relative to “thrust” axis) AA/pp ~ GeV Central Au+Au q q

Peter Steinberg Particle density near midrapidity e + e - scales like AA near midrapidity (dN/dy T )

Peter Steinberg (Mueller 1983) pp/pp A+A e+e-e+e- Total Multiplicity vs. Beam Energy Central A+A

Peter Steinberg Leading Particle Effect  N ch  Universality Basile et al ( ) (pp) Subtract energy of leading protons to define effective energy

Peter Steinberg Approach to Universality Universality e+e-e+e- Au+Au pp p+p  p+X :

Peter Steinberg How can AA scale like e + e - ?  Above ~3, pion yields constant  Central AA has ~5-6 per participant  Scaling with N part  Reduces leading particle effect  Scaling with  s counts # collisions N part = +1 pA collisions With increasing Proton “stops” (i.e. deposits energy) Pion yield saturates NA49 SPS Relative yield of  in pA/pp for y>0 NA49 (unpublished) CERN-SPSLC-P-264-ADD-5 E910 NA49

Peter Steinberg Centrality Dependence of  N ch  The Return of the Wounded Nucleon Model… Bialas & Czyz 1976, Elias et al 1978  inel =42 mb (RHIC) Glauber Monte Carlo Error band due to high-  extrapolation  inel =33 mb (SPS)  inel =21 mb (AGS) 19.6 GeV Preliminary Au+Au

Peter Steinberg Yields in AA scale primarily with N part Even at transverse momentum up to 5 GeV Gerrit van Nieuwenhuizen’s talk New perspective on hadron production? Two Kinds of Universality Universality in the forward region Data follow “limiting” distribution in  Universality of total multiplicity Same for all systems at same  s(  s eff for pp) “Startling” connection between Au+Au & e + e -

Peter Steinberg _ pp Au+Au 19.6 GeV preliminary 130 GeV 200 GeV Two Component Model: Charged Particle Production Central Density Data from PRC R (2002) = N coll /(N part /2)