Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr In stitute 1 First physics at RHIC with 65 AGeV + 65 AGeV and 100 AGeV + 100 AGeV Au+Au collisions Ecm= s 40 TeV 4000-5000 charged particles produced per collision Transparency or Stopping ? Towards nuclear ’stuff’ with matter-antimatter balance BRAHMS Y2000 + Y2001 @ RHIC: s nn =130 GeV, and s nn =200 GeV
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BRAHMS Y2000 + Y2001 @ RHIC: s nn =130 GeV, and s nn =200 GeV
BRAHMS Y2000 + Y2001 @ RHIC: s nn =130 GeV, and s nn =200 GeV. First physics at RHIC with 65 AGeV + 65 AGeV and 100 AGeV + 100 AGeV Au+Au collisions Ecm= s 40 TeV 4000-5000 charged particles produced per collision Transparency or Stopping ? - PowerPoint PPT Presentation
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Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute
1
First physics at RHIC with 65 AGeV + 65 AGeV and 100 AGeV + 100 AGeV Au+Au collisions
Ecm= s 40 TeV
4000-5000 charged particles produced per collision
Transparency or Stopping ?
Towards nuclear ’stuff’ with matter-antimatter balance
Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute
2
I.G. Bearden7, D. Beavis1, C. Besliu10, Y. Blyakhman6, J. Bondorf7, J.Brzychczyk4, B. Budick6, H. Bøggild7, C. Chasman1, C. H. Christensen7, P. Christiansen7, J.Cibor4, R.Debbe1, J. J. Gaardhøje7, M. Germinario7, K. Grotowski4, K. Hagel8, O.
Hansen7, H. Heiselberg7, A. Holm7, A.K. Holme12, H. Ito11, E. Jacobsen7, A. Jipa10, J. I. Jordre10, F. Jundt2, C. E. Jørgensen7, T. Keutgen9, E. J. Kim5, T. Kozik3, T.M.Larsen12, J.
H. Lee1, Y. K.Lee5, G. Løvhøjden2, Z. Majka3, A. Makeev8, B. McBreen1, M. Murray8, J. Natowitz8, B.S.Nielsen7, K. Olchanski1, D. Ouerdane7, R.Planeta4, F. Rami2, D.
Roehrich9, B. H. Samset12, S. J. Sanders11, D. Sandberg7,I. S. Sgura10, R.A.Sheetz1, Z.Sosin3, P. Staszel7, T.S. Tveter12, F.Videbæk1, R. Wada8 and A.Wieloch3.
1Brookhaven National Laboratory, USA 2IReS and Université Louis Pasteur, Strasbourg, France
3Jagiellonian University, Cracow, Poland 4Institute of Nuclear Physics, Cracow, Poland 5Johns Hopkins University, Baltimore, USA
6New York University, USA 7Niels Bohr Institute, Blegdamsvej 17, University of Copenhagen, Denmark 8Texas A&M University, College Station. USA
9University of Bergen, Norway 10University of Bucharest, Romania
11University of Kansas, Lawrence,USA 12 University of Oslo Norway
BRAHMS Intl. collaboration
Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute
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RHIC physicsAugust 2000 & August 2001
2:00 o’clock
4:00 o’clock6:00 o’clock
8:00 o’clock
10:00 o’clock
STARPHENIX
RHIC
AGS
LINACBOOSTER
TANDEMS
9 GeV/uQ = +79
1 MeV/uQ = +32
HEP/NP
g-2
U-lineBAF (NASA)
BRAHMS: Lpeak = 3.3 1025 cm-2 s-1
Lave = 1.7 1025 cm-2 s-1
Rcoll= 350 HzPHOBOS
6 b-1
2 wks
August 2000 and 2001
Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute
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Quark Gluon PlasmaHot and dense matter
QGP
HG
Freeze out
Hadron gas
Mixed phase
QGP
Pre-equil. quark
2.1012K
Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute
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URQMD simulation of Au+Au at snn=200 GeV
Rapidity y = ½ ln (E+pz / E- pz) = ½ ln(1+cos / 1-cos) y(lab) = y + y(cm)
Pseudorapidity = ln (cot [/2])
Transverse momentum pt= p sin
Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute
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Central Au+AU collision event in STAR
Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute
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BRAHMS in the 2’ hall
… in 1998
Dec 6, 2001 BH-symposium, Jens Jørgen Gaardhøje, Niels Bohr Institute