BRAHMS High p T Results from the BRAHMS Experiment Zhongbao Yin Department of Physics, University of Bergen for the BRAHMS Collaboration.

Slides:

Advertisements

Similar presentations

Results from BRAHMS experiment at RHIC Pawel Staszel Niels Bohr Institute for the BRAHMS Collaboration.

Advertisements

Dec 6, 2001BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute1 nFirst physics at RHIC with 65 AGeV + 65 AGeV and 100 AGeV AGeV Au+Au collisions.

RHIC AGS Users Meeting 12 May BRAHMS Highlights Ramiro Debbe for the BRAHMS collaboration Physics Department.

High p T Suppression at Forward Rapidities Catalin Ristea Niels Bohr Institute, Copenhagen for the BRAHMS Collaboration XXXV International Symposium on.

June 17, 2003NN2003, Moscow, Jens Jørgen Gaardhøje, Niels Bohr Institute1 n100 AGeV AGeV Au+Au Ecm =  s  40 TeV THE LITTLE BIG BANG and search.

June 17, 2003NN2003, Moscow, Jens Jørgen Gaardhøje, Niels Bohr Institute1 n100 AGeV AGeV Au+Au Ecm =  s  40 TeV THE LITTLE BIG BANG and search.

Michael Murray1 Global Detectors Flavor Dynamics Michael Murray for BRAHMS C. Arsene 12, I. G. Bearden 7, D. Beavis 1, S. Bekele 12, C. Besliu 10, B. Budick.

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

Baryon-to-meson production in a wide range of baryo-chemical potential at RHIC Paweł Staszel, Marian Smoluchowski Institute of Physics Jagiellonian University.

Transverse and Longitudinal Dynamics at RHIC Paweł Staszel, Marian Smoluchowski Institute of Physics Jagiellonian University SQM 2007 Levo č a, 24–

Baryon-to-meson production in a wide range of baryo-chemical potential at RHIC Paweł Staszel, Marian Smoluchowski Institute of Physics Jagiellonian University.

1 Mar. 26 SQM2006 J.H. Lee (BNL) Recent Results from BRAHMS J.H. Lee Physics Department Brookhaven National Laboratory For the Collaboration March

Phases of matter in the BRAHMS experiment Paweł Staszel, Marian Smoluchowski Institute of Physics Jagiellonian University for the BRAHMS Collaboration.

Winter Workshop, Big Sky, February 121 Flemming Videbaek Physics Department, BNL What did we learn from 200 and 62 GeV pp collisions at RHIC ? A BRAHMS.

J.H. Lee BNL Correlations Fest, June 2002, BNL HBT in BRAHMS.

H. Ito University of Kansas For the BRAHMS Collaboration The BRAHMS Institutions 1 Brookhaven National Laboratory, Upton, NY 11973, U.S.A. 2 Institut de.

P + p at 200 GeV K. Hagel Cyclotron Institute, Texas A & M for the BRAHMS Collaboration The spectrometers Particle antiparticle ratios –  s dependence.

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.

BRAHMS 16. August 2004 ICHEP04 Beijing, Kina I.G.Bearden, Niels Bohr Institute 1 BRAHMS Particle Production at Forward Rapidities with BRAHMS I.G. Bearden,

1 Identified Particle Dependence of Nuclear Modification Factors in d+Au Collisions at RHIC. Lee Barnby - University of Birmingham For the STAR Collaboration.

Transverse dynamics at y=0 in BRAHMS Bjørn H. Samset Transverse dynamics at RHIC, March 2003 A story of centrality dependent pt spectra of identified charged.

Recent Results from the BRAHMS Experiment at RHIC Paweł Staszel, Jagellonian University for the BRAHMS Collaboration Eighth Workshop on Non-Perturbative.

1 April 21 DIS2006 J.H. Lee (BNL) SSA in BRAHMS J.H. Lee (BNL) for BRAHMS Collaboration DIS2006, Tsukuba, April 2006 Short Introduction Preliminary results.

20-26 Feb Lake Louise Eun-Joo Kim Parton energy loss, saturation, and recombination at BRAHMS Eun-Joo Kim University of Kansas For the BRAHMS collaboration.

Fouad RAMI Institut Pluridisciplinaire Hubert Curien, Strasbourg  Introduction  The BRAHMS Experiment  Overview of Main Results  Bulk observables.

BRAHMS 22. Oktober 2004 Forward Physics Workshop, KU I.G.Bearden, Niels Bohr Institute 1 BRAHMS Particle Production Studied with BRAHMS I.G. Bearden, Niels.

1 Physics at forward rapidities How well does pQCD work p+p at 200 and 62 GeV Probing the initial condition d+Au collisions at 200 GeV Final state effects.

QM 2009, Knoxville1 Forward-Rapidity Azimuthal and Radial Flow of Identified Particles for = 200 GeV Au+Au and Cu+Cu Collisions S.J. Sanders (U. Kansas)

2nd International Workshop on the critical point and the onset of deconfinement Charged mesons in Au+Au interactions at 62.4 AGeV Ionut Arsene for the.

Rapidity Dependence of Charged Hadron Yields in Central Au+Au Collisions at 200 GeV Djamel Ouerdane Niels Bohr Institute for the BRAHMS Collaboration Quark.

BRAH Broad RAnge Hadron MS Magnetic Spectrometers 2.3° 30° 90° 30° The BRAHMS HI and Spin Programs S. J. Sanders U. Kansas.

Charged-particle pseudorapidity densities in d-Au collisions at  s=200GeV/A Hironori Ito Brookhaven National Laboratory BRAHMS Collaboration.

Results from the BRAHMS Experiment at RHIC F.Rami* for the BRAHMS Collaboration * Institut de Recherches Subatomiques and Université Louis Pasteur, Strasbourg.

Results from First RHIC run QM 2001 January 15, 2001 Results from First RHIC run QM 2001 January 15, 2001 F.Videbœk Physics Department Brookhaven National.

Strangeness production in Au+Au collisions at RHIC Jens Ivar Jørdre University of Bergen, Norway.

Strangeness Measurements in BRAHMS J.H. Lee Physics Department Brookhaven National Laboratory For the BRAHMS Collaboration SQM2003 Mar  Results.

1 Results from the BRAHMS experiment at RHIC Dieter Röhrich Fysisk institutt, Universitetet i Bergen for the BRAHMS collaboration Experimental setup Stopping.

1 Results from the BRAHMS experiment at RHIC Dieter Röhrich Fysisk institutt, Universitetet i Bergen for the BRAHMS collaboration Experimental setup Stopping.

Rapidity Dependence of Pion Elliptic Flow Hironori Ito 1 Erik Johnson 2 Steve Sanders 2 BRAHMS Collaboration 1 Brookhaven National Laboratory 2 University.

Recent Results from BRAHMS from y=0 to y=3 I. G. Bearden Niels Bohr Institute University of Copenhagen, Denmark Quark Matter 2002, July 18-24, Nantes,

HIGHLIGHTS BRAHMS I.G. Bearden, Niels Bohr Institute QM'06 Shanghai 2 Outline BRAHMS Intermediate PT Soft physics.

BRAHMS Scanning the phases of QCD I. Arsene, I.G. Bearden, D. Beavis, C. Besliu, B. Budick, H. Bøggild, C. Chasman, C. H. Christensen, P. Christiansen,

Presentation for NFR - October 19, Trine S.Tveter Recent results from RHIC Systems studied so far at RHIC: - s NN 1/2 = 

Elementary interactions and cold nuclear matter at RHIC Bjørn H. Samset Dr. student., UiO (In melting the nucleus, did we break some stained glass windows?)

Phases of matter in the BRAHMS experiment Paweł Staszel, Marian Smoluchowski Institute of Physics Jagiellonian University for the BRAHMS Collaboration.

Jaipur, India Feb title Recent Results from BRAHMS R. Debbe for the BRAHMS Collaboration Physics Dept. Brookhaven National Laboratory.

April 29, 2001APS-Wash-DC, Jens Jørgen Gaardhøje, Niels Bohr Institute1 nReaction features in 65 AGeV Au + 65AGeV Au nElectromagnetic dissociation ndN(ch)/d.

DNP2004 Oct Hyatt Regency Chicago IL Ramiro Debbe for the BRAHMS collaboration Physics Department Forward Identified Particle Production in d+Au.

Recent Results from BRAHMS at RHIC J.H. Lee Physics Department Brookhaven National Laboratory For the BRAHMS Collaboration Current and Future Directions.

Truls Martin Larsen, BRAHMS Collaboration, QM Aug 1 Nuclear Modification factors in Cu-Cu and Au-Au collisions Truls Martin Larsen.

Rapidity dependence of charged particle yields with BRAHMS for Au+Au at 200 GeV Djamel Ouerdane for the BRAHMS collaboration Quark Matter 2002 Nantes,

Zbigniew Majka M.Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland Review of early results from BRAHMS experiment.

Kaon Production in Central Au+Au Collisions at 200 and 63 GeV Djamel Ouerdane Niels Bohr Institute for the BRAHMS Collaboration Strange Quark Matter 2004.

BRAHMS Heavy Ion Results and Perspectives Erik Bjorn Johnson RHIC & AGS Users Meeting June 8, 2006.

Eun-Joo Kim ( Chonbuk Nat. Univ.) Hongyan Yang ( Univ. of Bergen ) For the Collaboration N MF Nuclear Modification Factors at BRAHMS.

BRAHMS 18. JUNI 2003 BNL High Pt Colloquium I.G.Bearden, Niels Bohr Institute 1 BRAHMS High P T Measurements with BRAHMS I.G. Bearden, Niels Bohr Institute.

8 th February 2002Michael Murray, Texas A&M, CMS Heavy Ion Mtg at MIT Brahms: Forward Physics at RHIC T1 MTPC1 T2 MTPC2 MRS: 90 deg 6.5 msr FS: 6 deg 0.8.

HAW Sep Maui, Hawaii Ramiro Debbe BNL Physics Department The excess of positive charged particles measured at forward rapidities in d+Au.

BRAHMS Zhongbao Yin Department of Physics, University of Bergen for the BRAHMS Collaboration High p T Spectra of Protons and Charged Pions in Au+Au and.

1 Physics at forward rapidities systems p+p at 200 and 62 GeV d+Au collisions at 200 GeV Au+Au collisions observables pt-spectra nuclear modification factor.

Baryon-to-meson production in a wide range of baryo-chemical potential at RHIC Paweł Staszel, Marian Smoluchowski Institute of Physics Jagiellonian University.

BRAHMS Y RHIC: snn=130 GeV, and snn=200 GeV

Radoslaw Karabowicz for the BRAHMS Collaboration

Eun-Joo Kim University of Kansas For the BRAHMS collaboration

Identified hadron production in d+Au and p+p collisions at RHIC

Recent Results from the BRAHMS

BRAHMS overview Paweł Staszel,

Identified Charged Hadron

Identified Charged Hadron Production at High pT

Forward Physics with BRAHMS at RHIC University of Bergen & CERN

Presentation transcript:

BRAHMS High p T Results from the BRAHMS Experiment Zhongbao Yin Department of Physics, University of Bergen for the BRAHMS Collaboration

BRAHMS The BRAHMS Experiment (II) Run III

BRAHMS Acceptance Rapidity Transverse momentum [GeV/c]

BRAHMS Why high p T physics is so interesting ● PQCD is applicable ● Probe and characterize the high energy density medium ● Disentangle different nuclear medium effects hadrons leading particle leading particle q q

BRAHMS Experimental Measurements ● Invariant spectra of high p T particles ● Centrality dependence of high p T particle yields ● To compare with pp spectra, introduce the nuclear modification factor:

BRAHMS Event Selection Centrality classes based on multiplicity ● Match up TPC and DC tracks in the magnets ● Point back to IP ● BB & ZDC vertex

BRAHMS Invariant Spectra of Charged Hadrons Accepted for publication in PRL (nucl-ex/ )

BRAHMS Nuclear Modification Factors

BRAHMS Ratio of R cp at  = 2.2 and 0 ● The degree of high p T suppression observed at  = 2.2 is similar to or larger than at midrapidity ● How is this understood?

BRAHMS Reminder

BRAHMS d+Au vs. Central Au+Au Collisions High p T enhancement observed in d+Au collisions at  s NN =200 GeV

BRAHMS Particle Identification at Forward Rapidity ● H2 (TOF) for low momentum ● 2.5 sigma cuts ● K/  separation up to 3.8 GeV/c ● RICH for higher momentum ● 3 sigma cuts ● K/  separation up to 18 GeV/c

BRAHMS Invariant Spectra for  - at y=2.2

BRAHMS R cp at y=2.2 for Negative Pion

BRAHMS Another Reminder (QM'02)

BRAHMS Summary ● Au+Au at  s NN =200 GeV  Strong high p T suppression in central collisions observed both at midrapidity and at forward rapidity  Suppression not observed in semi-peripheral collisions (40-60%) A similar high p T suppression is seen for the identified negative pion spectra as found for the total negative charged hadron spectra (independent analysis) More work and more statistics needed in order to get the particle composition at high p T ● d+Au at 200 GeV E nhancement of high p T yields observed at midrapidity. We will also investigate high p T yields at forward rapidity

BRAHMS The BRAHMS Collaboration I. Arsene 10, I. G. Bearden 7, D. Beavis 1, C. Besliu 10, B. Budick 6, H. Bøggild 7, C. Chasman 1, C. H. Christensen 7, P. Christiansen 7, J. Cibor 4, R. Debbe 1, E. Enger 12, J. J. Gaardhøje 7, M. Germinario 7, K. Grotowski 4, K. Hagel 8, O. Hansen 7, H. Ito 1, 11, A. Jipa 10, F. Jundt 2, J. I. Jørdre 9, C. E. Jørgensen 7, R. Karabowicz 3, E. J. Kim 5, T. Kozik 3, T. M. Larsen 12, J. H. Lee 1, Y. K. Lee 5, S. Lindal 12, R. Lystad 9, G. Løvhøiden 2, Z. Majka 3, A. Makeev 8, B. McBreen 1, M. Mikelsen 12, M. Murray 8, 11, J. Natowitz 8, B. Neumann 11, B. S. Nielsen 7, J. S. Norris 11, D. Ouerdane 7, R. Planeta 4, F. Rami 2, C. Ristea 10, O. Ristea 10, D. Röhrich 9, B. H. Samset 12, D. Sandberg 7, S. J. Sanders 11, R. A. Scheetz 1, P. Staszel 7, T. S. Tveter 12, F. Videbæk 1, R. Wada 8, Z. Yin 9, I. S. Zgura 10 1 Brookhaven National Laboratory, USA, 2 IReS and Université Louis Pasteur, Strasbourg, France 3 Jagiellonian University, Krakow, Poland, 4 Institute of Nuclear Physics, Cracow, Poland 5 Johns Hopkins University, Baltimore, USA, 6 New York University, USA 7 Niels Bohr Institute, University of Copenhagen, Denmark 8 Texas A&M University, College Station, USA, 9 University of Bergen, Norway 10 University of Bucharest, Romania, 11 University of Kansas, Lawrence,USA 12 University of Oslo Norway