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HIGHLIGHTS

HIGHLIGHTS. BRAHMS. Outline. BRAHMS Intermediate PT Soft physics. BRAHMS Collaboration. I. C. Arsene 12 , I. G. Bearden 7 , D. Beavis 1 , S. Bekele 12 , C. Besliu 10 , B. Budick 6 , H. B ø ggild 7 , C. Chasman 1 , C. H. Christensen 7 , P. Christiansen 7 , H.Dahlsgaard 7 , R. Debbe 1 ,

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HIGHLIGHTS

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  1. HIGHLIGHTS BRAHMS

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

  3. BRAHMS Collaboration I. C. Arsene12, I. G. Bearden7, D. Beavis1, S. Bekele12, C. Besliu10, B. Budick6, H. Bøggild7, C. Chasman1, C. H. Christensen7, P. Christiansen7, H.Dahlsgaard7, R. Debbe1, J. J. Gaardhøje7, K. Hagel8, H. Ito1, A. Jipa10, E.B.Johnson11, J. I. Jørdre9, C. E. Jørgensen7, R. Karabowicz5, N. Katrynska5 ,E. J. Kim11, T. M. Larsen7, J. H. Lee1, Y. K. Lee4,S. Lindahl12, G. Løvhøiden12, Z. Majka5, M. J. Murray11,J. Natowitz8, C.Nygaard7 B. S. Nielsen7, D. Ouerdane7, D.Pal12, F. Rami3, C. Ristea8, O. Ristea11, D. Röhrich9, B. H. Samset12, S. J. Sanders11, R. A. Scheetz1, P. Staszel5, T. S. Tveter12, F. Videbæk1, R. Wada8, H. Yang9, Z. Yin9, I. S. Zgura2 1. Brookhaven National Laboratory, Upton, New York, USA 2. Institute of Space Science, Bucharest - Magurele, Romania 3. Institut Pluridisciplinaire Hubert Curien et Université Louis Pasteur, Strasbourg, France 4. Johns Hopkins University, Baltimore, USA 5. M. Smoluchkowski Institute of Physics, Jagiellonian University, Krakow, Poland 6. New York University, New York, USA 7. Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark 8. Texas A&M University, College Station, Texas, USA 9. University of Bergen, Department of Physics and Technology, Bergen, Norway 10. University of Bucharest, Romania 11. University of Kansas, Lawrence, Kansas, USA 12. University of Oslo, Department of Physics, Oslo, Norway I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  4. Broad RAnge Hadronic Magnetic SpectrometerS I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  5. Acceptance for charged hadrons I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  6. Pushing to forward y What changes? dN/dy pbar/p Chemistry V2 (integral) Initial state? (d+Au) What doesn’t? Suppression (A+A) V2 (pt) B2 I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  7. Intermediate (2-6GeV)Pt • h+,h- from eta=0 to 3.5 • Identified particles to yp≈3.1-3.5 (depending on system) • Au+Au (200GeV, 62GeV) Cu+Cu (200,62), p+p (200, 62) I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  8. 200 GeV Au+Au (Run IV) 10% 40-60% p+p I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  9. spectra as f(pseudo rapidity) I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  10. Identified particle RAA, 200GeV Au+Au y=3.1 y=1 y=0 pions kaons protons I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  11. Identified particle RAA, 200GeV Au+Au See Poster by Catalin Ristea I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  12. Cu+Cu 62 GeV charged hadrons I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  13. p+p 62GeV Reference for RAA Kinematic limit I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  14. RAA 62 GeV midrapidity top, Cu+Cu; bottom Au+Au I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  15. RAA Cu+Cu,Au+Au 62 GeV, =3.1 I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  16. RAA Cu+Cu,Au+Au 62 GeV, =3.1 See talk(||1.1) by Truls Larsen I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  17. RdAu vs eta I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  18. RdAu vs eta See talk(||1.1) by Hongyan Yang I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  19. Other BRAHMS contributions • J.H.Lee talk on suppression vs. xF • Parallel session 1.1 Wednesday • S. Bekele poster 200GeV Cu+Cu @ forward rapidity I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  20. V2 Identified particles 200GeV Au+Au ≈3  =0 K p I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  21. V2 Identified particles 200GeV Au+Au See talk(||3.4) by Steve Sanders I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  22. Coalescence: p+n d • Characterize source via B2 • Assume B2≈V-1 • Details: • C. Nygaard • (||3.4 Sun.) I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  23. What can we say about size vs. Rapidity? I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  24. What can we say about size vs. Rapidity? See talk(||3.4) by Casper Nygaard I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  25. Stopping: where are the baryons? I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  26. Stopping 62 GeV Au+Au I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  27. K/p vs. y 62 GeV Au+Au I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  28. K/p vs. y 62 GeV Au+Au See Poster by Ionut Arsene I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  29. How about vs. pbar/p? I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  30. Stopping: systematic I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  31. LHC? AGS dN/dy SPS RHIC 62 “net”proton (BRAHMS preliminary) RHIC 200 LHC 5500 I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  32. LHC? AGS AGS dN/dy dN/dy SPS SPS RHIC 62 RHIC 62 “net”proton “net”proton (BRAHMS preliminary) (BRAHMS preliminary) RHIC 200 RHIC 200 LHC 5500 LHC 5500 See Poster by Hans Dahlsgaard I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  33. Summary What changes? dN/dy pbar/p Chemistry V2 (integral) Initial state? (d+Au) • What doesn’t? • Suppression (A+A) • V2 (pt) • B2 I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  34. Backup Slides I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  35. Inverse slope vs pbar/p I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  36. Particle Identification CHERENKOV RICH: Cherenkov light focused on spherical mirror  ring on image plane Ring radius vs momentum gives PID  / K separation 20 GeV/c Proton ID up to 35 GeV/c TIME-OF-FLIGHT (2 settings) I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

  37. BRAHMS Acceptance: p K p I.G. Bearden, Niels Bohr Institute QM'06 Shanghai

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