Adam Trzupek The Henryk Niewodniczański Institute of Nuclear Physics

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)

Particle Production in p + p Reactions at GeV K. Hagel Cyclotron Institute Texas A & M University for the BRAHMS Collaboration.

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.

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.

JUNE 1997PHOBOS Review Mark D. Baker PHOBOS Review Physics Simulations Mark D. Baker Physics PHOBOS design is sound. –( & PHOBOS Computing Project is on.

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.

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.

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

RHIC Physics Through the Eyes of PHOBOS

High-pT Identified Hadron Production in Au+Au and Cu+Cu Collisions

Presentation transcript:

Particle Production at Very Low and Intermediate Transverse Momenta in d+Au and Au+Au Collisions Adam Trzupek The Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences Kraków, Poland for the Collaboration Quark Matter 2005 18th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Budapest, Hungary

Collaboration (August 2005) 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 LABORATORY BROOKHAVEN NATIONAL LABORATORY INSTITUTE OF NUCLEAR PHYSICS PAN, KRAKOW MASSACHUSETTS INSTITUTE OF TECHNOLOGY NATIONAL CENTRAL UNIVERSITY, TAIWAN UNIVERSITY OF ILLINOIS AT CHICAGO UNIVERSITY OF MARYLAND UNIVERSITY OF ROCHESTER

Particle Production at Very Low pT Au+Au, 200 GeV centrality: 0-15% mid-rapidity PHOBOS:  PRC 70 (2004) 051901(R)  PLB 578 (2004) 297 PHOBOS experiment has a unique capability to measure particles down to very small transverse momenta: 0.03 - 0.2 GeV/c BULK Enhanced production of low-pT particles was predicted as a consequence of NEW long wave-length phenomena TAIL Particle spectra at low pT can be modified due to collective transverse expansion A recent optical model implies that chiral symmetry restoration can have significant impact on shapes of pion spectra at very low pT J.Cramer, et al., Phys. Rev. Lett. 94 (2005) 102302

pT and PID Measurement in PHOBOS Spectrometer 70 cm PHOBOS Spectrometer 16 layers of silicon wafers fine pixelization, precise dE measurement collision vertex close to spectrometer near mid-rapidity coverage dipole magnetic field of 2T at maximum 10 cm z -x pT > 0.2 GeV/c track curvature in B field p,charge dE/dx in Si, ToF mass pT = 0.03 - 0.2 GeV/c low-p particles stop in silicon wafers p, mass B field negligible no charge identification 0 10 20 Z [cm] X[cm] A B C D E F Be pipe .

PHOBOS PID Capabilities PRC 70 (2004) 051901(R) 1 2 3 4 5 p (GeV/c) 30 40 50 60 70 p+p 1/v (ps/cm) K +K + - ++- Eloss (MeV) p (GeV/c) Stopping particles dE/dx TOF 0.5 5.0 0.03 pT (GeV/c) Particle ID from low to high pT

Identified Particle pT -Spectra, Au+Au at 62.4 GeV These results at 62.4 GeV fit smoothly into the energy evolution of antiparticle/particle ratios

Low-pT Spectra of Identified Particles in Au+Au Collisions at sNN =62.4 GeV (2pT)1d2N/dydpT[c2/GeV2] Blast wave fit parameters: 0-15%: Tfo = 99 MeV, <T>=0.51 c 15-30%: Tfo = 98 MeV, <T>=0.51 c 30-50%: Tfo = 97 MeV, <T>=0.49 c (2pT)1d2N/dydpT[c2/GeV2] (2pT)1d2N/dydpT[c2/GeV2]

Low-pT Spectra of Identified Particles Au+Au at sNN = 200 GeV B-E fit PHOBOS, PR C70, 051901 (R) (2004) PHENIX, PR C69, 034909 (2004) mT = pT2+mh2  BWF fit (2pT)1d2N/dydpT[c2/GeV2] T= 229 MeV for (++-) 293 MeV for (K++ K-) 392 MeV for (p + p) Blast Wave Fit: Tfo= 99 MeV <T> = 0.54 c No enhancement in low-pT yields for pions is observed Flattening of (p+p) spectra down to very low pT, consistent with transverse expansion of the system

Invariant Yields of Very Low pT Particles in Central Au+Au Collisions at sNN=200 GeV (2pT)1d2N/dydpT[c2/GeV2] (2pT)1d2N/dydpT[c2/GeV2]

Low-pT Spectra as Model Constraints (2pT)1d2N/dydpT[c2/GeV2] J. Cramer (private comm., erratum to be published) J.Cramer, et al., PRL 94 (2005) 102302

Identified Particle pT -Spectra, d+Au at sNN= 200 GeV pT range: (++-) : > 0.03 GeV/c (K++ K-): > 0.09 GeV/c (p + p) : > 0.14 GeV/c Background corrections: very low-pT: (++-) : 20% (K++ K-): 10% (p + p) : 20% intermediate pT (p + p) : ~20% Systematic uncertainties: very low pT: ~30% intermediate pT : ~15% Event selection: described in PRL 93, 082301 (2pT)1d2N/dydpT[c2/GeV2] Tfo = 152 MeV, <T>=0.37 c

mT -Scaling in d+Au at sNN= 200 GeV (2pT)1d2N/dydpT[c2/GeV2] (++-), (K++ K-), (p + p) mT-yields are similar after scaling (K++ K-) yield by a factor 2 (strangeness suppression) Local slopes of mT -spectra similar Tloc[GeV/c2]

mT -Scaling in d+Au vs. Au+Au at sNN = 200 GeV PRC 70 (2004) 051901(R) (2pT)1d2N/dydpT[c2/GeV2] (2pT)1d2N/dydpT[c2/GeV2] Tloc[GeV/c2] Tloc[GeV/c2] In central Au+Au, larger flattening for of p+p mT spectra at small pT Low-pT spectra of p+p can constrain models describing collective transverse expansion of the system

Summary No evidence for enhanced production of very low-pT pions iaiiin the mosticentral Au+Au collisions at energy 62.4 and iaii200 GeV Flattening of p+p mT spectra at low-pT in 15% most central iaiiAu+Au collisions at energy 62.4 and 200 GeV Approximate mT scaling of particle spectra for d+Au iaiicollisions at low and intermediate transverse momentum New constraints on models and fits

backups

PID Measurement in PHOBOS Spectrometer pT > 0.2 GeV/c pT = 0.03 - 0.2 GeV/c p+p p K <dE/dx>  K +K + - ++- Etot =  dEi , i=A, ... ,E Mpi = Ei dEi/dx Mp = < Mpi > /K separation: pT < ~0.6 GeV/c p(p) separation: pT < ~1.2 GeV/c

d+Au, Model Comparison