Presentation is loading. Please wait.

Presentation is loading. Please wait.

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.

Published byHugh Quinn Modified over 8 years ago

Similar presentations

Presentation on theme: "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."— Presentation transcript:

1 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 collaboration Division of Nuclear Physics, Chicago 29 October 2004

2 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Collaboration (October 2004) Burak Alver, Birger Back, Mark Baker, Maarten Ballintijn, Donald Barton, Russell Betts, Abigail Bickley, Richard Bindel, Wit Busza (Spokesperson), Alan Carroll, Zhengwei Chai, Vasundhara Chetluru, Patrick Decowski, Edmundo García, Tomasz Gburek, Nigel George, Kristjan Gulbrandsen, Clive Halliwell, Joshua Hamblen, Ian Harnarine, Conor Henderson, David Hofman, Richard Hollis, Roman Hołyński, Burt Holzman, Aneta Iordanova, Jay Kane, Nazim Khan, Piotr Kulinich, Chia Ming Kuo, Wei Li, Willis Lin, Steven Manly, Alice Mignerey, Gerrit van Nieuwenhuizen, Rachid Nouicer, Andrzej Olszewski, Robert Pak, Heinz Pernegger, Corey Reed, Christof Roland, Gunther Roland, Joe Sagerer, Iouri Sedykh, Wojtek Skulski, Chadd Smith, Maciej Stankiewicz, Peter Steinberg, George Stephans, Andrei Sukhanov, Marguerite Belt Tonjes, Adam Trzupek, Carla Vale, Sergei Vaurynovich, Robin Verdier, Gábor Veres, Peter Walters, Edward Wenger, Frank Wolfs, Barbara Wosiek, Krzysztof Woźniak, Alan Wuosmaa, 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

3 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Spectrometer Paddle Trigger Counter 137000 Silicon Pad Channels T0 counter PHOBOS Detector 2004 NIM A 499, 603-623 (2003)

4 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Centrality Range Studied at 62.4 GeV Centrality 45-50% 61  785  14 35-45% 86  9136  22 25-35% 130  10240  30 15-25% 189  9402  36 6-15% 266  9643  48 0-6% 335  11883  65

5 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Charged Hadron p T Spectra Corrected for: Acceptance Efficiency Feed-down Secondaries Momentum resolution Ghosts Bin width Dead channels nucl-ex/0405003

6 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R AA for Au+Au at  s NN = 62.4 GeV R AA significantly higher at 62.4 GeV than at 200 GeV

7 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R AA at 62.4 GeV from Theory (I) Vitev: nucl-th/0404052 XN Wang: nucl-th/0405029 Adil, Gyulassy: nucl-th/0405036 From parton energy loss calculations:

8 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R AA at 62.4 GeV from Theory (II) Eskola, Honkanen, Salgado, Wiedemann: hep-ph/0406319 Gallmeister, Cassing: hep-ph/0408223

9 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Factorization of Energy and Centrality Dependence Centrality dependence of vs. p T is the same at both energies Challenge to collision models to reproduce this

10 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Factorization for Particle Multiplicity PHOBOS, Phys. Rev. C70, 021902(R) (2004) Factorization also seen for mid-rapidity multiplicity, from 19.6 to 200 GeV

11 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 PHOBOS PID Capabilities at 62.4 GeV dE/dx in SiliconTime-of-flight

12 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Conclusions PHOBOS has measured h  p T spectra up to 4 GeV in Au+Au collisions at  s NN = 62.4 GeV R AA significantly higher at 62.4 GeV than at 200 GeV But the centrality dependence of the p T yields found to be remarkably similar at the two energies - this factorization also seen in mid-rapidity particle yields from 19.6 to 200 GeV Appears to be a key feature of heavy-ion collisions which remains to be understood

13 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Back-up Slides

14 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 The PHOBOS Spectrometer z y 70 cm 10cm x Silicon sensors Outer layers in 2T magnetic field High segmentation in bending direction Tracking within 10 cm of interaction point Coverage near mid- rapidity

15 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Definitions

16 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Centrality Range at 200 GeV Centrality 45-50% 65  499  11 35-45% 93  5164  15 25-35% 138  6286  25 15-25% 200  8483  40 6-15% 276  9762  57 0-6% 344  111040  77

17 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Centrality Range at 62.4 & 200 GeV

18 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 N part and N coll vs.  s NN Nucleon-nucleon inelastic cross-section grows with collision energy So N coll /N part increases with  s NN

19 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R AA Npart and R PC Npart

20 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R PC Npart vs. N part in p T bins for 200GeV

21 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 Z Phys. C 69, 55 (1995) Nucl. Phys. B 207, 1 (1982) Phys. Lett. B 83, 257 (1979) Nucl. Phys. B 335, 261 (1990) p+p Reference Spectrum at 62.4 & 200 GeV SFM @ISR

22 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 PHOBOS and STAR at 200 GeV PLB 578297, 2004 PRL 91, 172302, 2003

23 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 PHENIX p T Spectra at  s NN = 200 GeV Insert PHENIX reference

24 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R AA at 62.4 GeV from Theory (IV) Adil, Gyulassy: nucl-th/0405036

25 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R AA at 62.4 GeV from Theory (II) Eskola, Honkanen, Salgado, Wiedemann: hep-ph/0406319 pQCD collinearly factorized formalism with radiative parton energy loss

26 Conor Henderson, MIT Division of Nuclear Physics, Chicago, 2004 R AA at 62.4 GeV from Theory (III) Gallmeister, Cassing: hep-ph/0408223 Hadron string dynamical transport model Hadron attenuation attributed to inelastic collisions of leading pre-hadron with dense hadronic medium

Download ppt "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."

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.

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

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.

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 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.

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)

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 20051 System size, energy and  dependence of directed and elliptic flow Steven Manly.

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.

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, 2006 1 Strangeness measurements with the Experiment Gábor Veres Eötvös Loránd University,

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 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, 20061 The eccentricities of flow S. Manly University of Rochester International Workshop on Hadron Physics.

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.

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.

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.

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.

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.

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, 2006 1 Anti-particle to particle ratios in p+p, Cu+Cu and Au+Au collisions at RHIC Gábor I.

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.

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.

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.

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

Similar presentations

Ads by Google