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Relativistic Heavy Ions Experiment II

Relativistic Heavy Ions Experiment II. Global Observables. Participant – Spectator Scenario. NA49 Trigger Setup. NA49 Target Area. NA49 Ring Calorimeter. NA49 Veto Calorimeter. Hadronic Calorimeter. Distributions of N ch and E T. Correlation E F and E T. Centrality Classes.

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Relativistic Heavy Ions Experiment II

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  1. Relativistic Heavy IonsExperiment II Global Observables

  2. Participant – Spectator Scenario

  3. NA49 Trigger Setup

  4. NA49 Target Area

  5. NA49 Ring Calorimeter

  6. NA49 Veto Calorimeter

  7. Hadronic Calorimeter

  8. Distributions of Nch and ET

  9. Correlation EF and ET

  10. Centrality Classes

  11. Centrality Selection via Multplicity: WA97 / NA57

  12. Centrality Selection via Multplicity: WA97 / NA57

  13. Beam-Beam Counter atRHIC

  14. Beam-Beam Counter at RHIC

  15. Zero Degree Calorimeter (ZDC) at RHIC

  16. Centrality Selection at RHIC

  17. ET Distribution

  18. Energy Density (Bjørken)

  19. Wounded Nucleon Scaling

  20. Participant Scaling

  21. Energy Density

  22. yP yT yP yT y y y y y’p y’T y0 y0 Stopping Baryonnumber distributions Lower energies: Higher energies:

  23. Stopping Observable: net-proton distributions NA49

  24. Stopping

  25. Energy Dependence of y  Rapidity shift: Linear increase up to SPS: y /ybeam  0.27 Energy loss E : RHIC (sNN = 200 GeV): E = 25.7 ± 2.1 TeV E/Nucleon = 72± 6 GeV

  26. Net-protons: 3 Valence Quarks (uud ) Net s: 2 Valence (ud ) + 1 produced Quark (s ) Net s: 1 Valence (d ) + 2 produced Quarks (ss ) Omegas: 3 produced Quarks (sss ) Rapidity-Distributions of Baryons Central Pb+Pb, 158 AGeV NA49 dn/dy (a.u.) y

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