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Relativistic Heavy Ion Physics with ALICE

Relativistic Heavy Ion Physics with ALICE. By Bj ørn S. Nilsen The Ohio State University. Outline. The ALICE detector MUON Arm, and “new” TRD. PHOS, and a Proposed EMCAL. The Quark Gluon Plasma How we can use Heavy flavor states, and jets to study the QGP.

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Relativistic Heavy Ion Physics with ALICE

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  1. Relativistic Heavy Ion Physics with ALICE By Bjørn S. Nilsen The Ohio State University

  2. Outline • The ALICE detector • MUON Arm, and “new” TRD. • PHOS, and a Proposed EMCAL. • The Quark Gluon Plasma • How we can use Heavy flavor states, and jets to study the QGP. • What the “new” detectors allow us to do. • Conclusion Presented by Bjørn S. Nilsen

  3. Presented by Bjørn S. Nilsen

  4. With EMCAL Presented by Bjørn S. Nilsen

  5. Interacting Nuclei • RQMD simulation • 5 TeV/n • Au+Au • B=5 fm Presented by Bjørn S. Nilsen

  6. Space-Time EvolutionPre-equilibrium Formation phase. Creation of Probes into the QGP. • Hard scattering • Heavy flavor production • Quark/Gluon jet production • Direct Photon production Presented by Bjørn S. Nilsen

  7. Gluon Saturation? Q2sat=8παsNc/(Nc2-1)ρAxG(x,Qsat) ρAA/πR2 A1/3 Presented by Bjørn S. Nilsen

  8. Space-Time EvolutionQGP Quart-Gluon Plasma Phase The Phase to be studied. • Deconfined Quarks and Gluons. • Chiral Symmetry resorted? Presented by Bjørn S. Nilsen

  9. The QGP εLHC ~20 εRICH εLHC ~15-40 GeV/fm3 τQGP-LHC~ 2 τQGP-RICH τQGP-LHC~4-10 fm/c τQGP τQGP τTherm τTherm 30 ~ 10 RICH LHC Presented by Bjørn S. Nilsen

  10. Space-Time EvolutionPost QGP • Hadron Gas • Hadron formation • Secondary interactions • Free Streaming • No Interactions • Resonance decays • Standard Vacuum Presented by Bjørn S. Nilsen

  11. ALICECharged Particle Acceptance Presented by Bjørn S. Nilsen

  12. DiMuonsHeavy Mesons Presented by Bjørn S. Nilsen

  13. Heavy Mesonsin Dimuons Presented by Bjørn S. Nilsen

  14. Dielectrons Presented by Bjørn S. Nilsen

  15. ALICE PhotonAcceptance 8% 2% Presented by Bjørn S. Nilsen

  16. PhotonsPHOS Identified Photon spectrum measured with 85-99 % purity Presented by Bjørn S. Nilsen

  17. PHOS Pb-Pbπ0 resolution Presented by Bjørn S. Nilsen

  18. PHOSAA @ LHC sNN = 5.5 TeV,10% centralg in one year With high pT trigger Inclusive g (pQCD+p0) Direct g (pQCD) Presented by Bjørn S. Nilsen

  19. Expanded PHOSEMCAL γ-PHOS + jet-TPC Jet-TPC Presented by Bjørn S. Nilsen

  20. Further StudiesContinue • With our first in a series of Physics Challenges, presently on going, we are reevaluating the performance of the full ALICE detector. • This leads to another challenge, that of distributing all of the needed computing in an effective way. Presented by Bjørn S. Nilsen

  21. Conclusions • With the PHOS, MUON arm, TRD, and the proposed EMCAL, ALICE will greatly improve its heavy flavor, direct photon,and jet physics capabilities. • These new, more accessible, probes, along with ALICE’s excellent soft physics capabilities, will help ALICE to study the Quark Gluon Plasma in greater detail. Presented by Bjørn S. Nilsen

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