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

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.

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.

Gábor Veres Strangeness in Quark Matter ‘06, UCLA, March 27, Strangeness measurements with the Experiment Gábor Veres Eötvös Loránd University,

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.

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.

Richard Bindel, UMDDivision of Nuclear Physics, Maui, 2005 System Size and Energy Dependence of Elliptical Flow Richard Bindel University of Maryland For.

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.

Gábor I. Veres Massachusetts Institute of Technology for the Collaboration International Workshop on Hot and Dense Matter in Relativistic Heavy Ion Collisions.

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.

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

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.

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.

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.

21 st June 2007 RHIC & AGS Users’ Meeting Recent RHIC Results on Bulk Properties Richard Hollis.

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.

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:

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

Gunther Roland - MITPHOBOS ISMD’052 Burak Alver, Birger Back, Mark Baker, Maarten Ballintijn, Donald Barton, Russell Betts, Richard Bindel, Wit Busza (Spokesperson), Zhengwei Chai, Vasundhara Chetluru, Edmundo García, Tomasz Gburek, Kristjan Gulbrandsen, Clive Halliwell, Joshua Hamblen, Ian Harnarine, Conor Henderson, David Hofman, Richard Hollis, Roman Hołyński, Burt Holzman, Aneta Iordanova, Jay Kane,Piotr Kulinich, Chia Ming Kuo, Wei Li, Willis Lin, Constantin Loizides, Steven Manly, Alice Mignerey, Gerrit van Nieuwenhuizen, Rachid Nouicer, Andrzej Olszewski, Robert Pak, Corey Reed, Eric Richardson, Christof Roland, Gunther Roland, Joe Sagerer, Iouri Sedykh, Chadd Smith, Maciej Stankiewicz, Peter Steinberg, George Stephans, Andrei Sukhanov, Artur Szostak, Marguerite Belt Tonjes, Adam Trzupek, Sergei Vaurynovich, Robin Verdier, Gábor Veres, Peter Walters, Edward Wenger, Donald Willhelm, Frank Wolfs, Barbara Wosiek, Krzysztof Woźniak, Shaun Wyngaardt, Bolek Wysłouch ARGONNE NATIONAL LABORATORYBROOKHAVEN NATIONAL LABORATORY INSTITUTE OF NUCLEAR PHYSICS PAN, KRAKOWMASSACHUSETTS INSTITUTE OF TECHNOLOGY NATIONAL CENTRAL UNIVERSITY, TAIWANUNIVERSITY OF ILLINOIS AT CHICAGO UNIVERSITY OF MARYLANDUNIVERSITY OF ROCHESTER PHOBOS Collaboration

Gunther Roland - MITPHOBOS ISMD’053 RHIC Heavy Ion Collision

Gunther Roland - MITPHOBOS ISMD’054 PHOBOS Experiment

Gunther Roland - MITPHOBOS ISMD’055 centrality Au+Au : PRL 91, (2003) d+Au : PRL 93, (2004) 19.6 GeV62.4 GeV130 GeV 200 GeV preliminary Cu+Cu d+Au Au+Au PHOBOS Charged Hadron dN/d 

Gunther Roland - MITPHOBOS ISMD’056 1st Remark To good approximation (  ), all events are “the same”

Gunther Roland - MITPHOBOS ISMD’057 Raw dN/d  seen by PHOBOS Search for unusual events: I. Multiplicity Fluctuations  Integral II. Shape Fluctuation   2 of single-event vs average

Gunther Roland - MITPHOBOS ISMD’058 Unusual Events in Au+Au Multiplicity distribution and  2 (shape) distribution shows distinct tails - O(10 -4 ) 200 Events Total Multiplicity FluctuationsShape Fluctuations 2M Events Frequency of events

Gunther Roland - MITPHOBOS ISMD’059 Possible Explanation Rate of unusual events correlates with ‘luminosity’ - Consistent with collision-pileup as source of rare events Shape FluctuationsTotal Multiplicity Fluctuations

Gunther Roland - MITPHOBOS ISMD’0510 2nd Remark Hadrons are not produced one-by-one, but in “clusters”

Gunther Roland - MITPHOBOS ISMD’0511 Analysis Concept RMS used to determine σ C P-N P N P+N (Impact parameter) (Partitioning) PN Forward/backward multiplicity fluctuations

Gunther Roland - MITPHOBOS ISMD’0512 Clusters and σ 2 C P N Forward/backward correlations give access to cluster structure of particle production

Gunther Roland - MITPHOBOS ISMD’0513 Cluster-size from F/B fluctuations 40-60% peripheral0-20% central PHOBOS 200 GeV Au+Au preliminary PHOBOS 200 GeV Au+Au preliminary Forward/backward correlations suggest effective cluster size of  for 200 GeV Au+Au

Gunther Roland - MITPHOBOS ISMD’0514 Clusters in p+p 546 GeV P+N UA5: Phys.Lett.B123:361,1983 K eff Reminiscent of results from p+p

Gunther Roland - MITPHOBOS ISMD’0515 3rd Remark Initial state shape fluctuations drive expansion dynamics

Gunther Roland - MITPHOBOS ISMD’0516 “Elliptic Flow” Non-central collision: Initial state eccentricity

Gunther Roland - MITPHOBOS ISMD’0517 “Elliptic Flow” Time Transverse Plane Azimuthal Angle (rad) Non-central collision: Initial state eccentricity Elliptic Flow: Final state anisoptropy 2*v 2

Gunther Roland - MITPHOBOS ISMD’0518 preliminary PHOBOS 200 GeV h ± Statistical errors only Cu+Cu preliminary Au+Au PHOBOS 200 GeV Statistical errors only v 2 for Au+Au follows initial state eccentricity v 2 near mid-rapidity Elliptic Flow vs N part

Gunther Roland - MITPHOBOS ISMD’0519 preliminary PHOBOS 200 GeV h ± Statistical errors only Cu+Cu preliminary Au+Au PHOBOS 200 GeV Statistical errors only Substantial v 2 even for most central bin in Cu+Cu v 2 near mid-rapidity Elliptic Flow vs N part

Gunther Roland - MITPHOBOS ISMD’0520 Standard Eccentricity x y Nucleus 2 Nucleus 1 Participant Region b Au+Au Cu+Cu Au+Au Eccentricity Calculation

Gunther Roland - MITPHOBOS ISMD’0521 Standard Eccentricity x y Nucleus 2 Nucleus 1 Participant Region b Au+Au Cu+Cu Au+Au Nucleus 1 Nucleus 2 Participant Region x y Participant Eccentricity b Au+Au Cu+Cu Au+Au Eccentricity Calculation

Gunther Roland - MITPHOBOS ISMD’0522 Standard Eccentricity Cu+Cu Au+Au Low Density Limit: STAR, PRC (2002) Voloshin, Poskanzer, PLB (2000) Heiselberg, Levy, PRC , (1999) Density Scaling

Gunther Roland - MITPHOBOS ISMD’0523 Standard Eccentricity Cu+Cu Au+Au Participant Eccentricity Cu+Cu Au+Au Low Density Limit: STAR, PRC (2002) Voloshin, Poskanzer, PLB (2000) Heiselberg, Levy, PRC , (1999) Density Scaling “Participant Eccentricity” allows v 2 scaling from Cu+Cu to Au+Au

Gunther Roland - MITPHOBOS ISMD’0524 Summary  Initial state shape fluctuations drive expansion dynamics  To good approximation (  ), all events are “the same”  Hadrons are not produced one-by-one, but in “clusters”

Gunther Roland - MITPHOBOS ISMD’0525 Backup Raw data  

Gunther Roland - MITPHOBOS ISMD’0526 Backup Standard Eccentricity Cu+Cu preliminary Au+Au PHOBOS 200 GeV “Participant Eccentricity” allows v 2 scaling from Cu+Cu to Au+Au Participant Eccentricity PHOBOS 200 GeV Au+Au Cu+Cu preliminary

Gunther Roland - MITPHOBOS ISMD’0527 L~A 1/3 N coll = # of NN collisions: ~A 4/3 N part /2 ~ A “Participants” “Collisions” PHOBOS Glauber MC Au+Au Cu+Cu Au+Au Cu+Cu Backup

Gunther Roland - MITPHOBOS ISMD’0528 Backup PHOBOS Glauber MC Au+Au vs Cu+Cu –Interplay of initial geometry and initial density –Test ideas of early thermalization and collectivity wrt reaction plane x y Nucleus 2 Nucleus 1 Participant Region Au+Au Cu+Cu

Gunther Roland - MITPHOBOS ISMD’0529 Backup Eccentricity difference is important for same centrality selection. V 2 (p T ) for Cu-Cu is similar v 2 (p T ) for Au-Au when scaled by  part PHOBOS preliminary h ± 0-50% centrality PHOBOS preliminary h ± 0-50% centrality PHOBOS preliminary h ± 0-50% centrality

Gunther Roland - MITPHOBOS ISMD’0530 Au+Au: PRL 94, (2005), PLB 578, 297 (2004) Cu+Cu preliminary Au+Au Backup