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Electromagnetic Probes of Strongly Interacting Matter in Heavy-Ion Collision

Electromagnetic Probes of Strongly Interacting Matter in Heavy-Ion Collision. B. Kämpfer Research Center Rossendorf/Dresden. Spectra 2) Measuring Temperatures 3) Advanced Models 4) Charm. with K. Gallmeister, S. Zschocke supported by BMBF, GSI. Data. Simulation. Syst. Error est.

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Electromagnetic Probes of Strongly Interacting Matter in Heavy-Ion Collision

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  1. Electromagnetic Probesof Strongly Interacting Matterin Heavy-Ion Collision B. Kämpfer Research Center Rossendorf/Dresden • Spectra • 2) Measuring Temperatures • 3) Advanced Models • 4) Charm with K. Gallmeister, S. Zschockesupported by BMBF, GSI

  2. Data Simulation Syst. Error est. dN/dM [1./MeV/coll.] Syst. Bias for M<150 MeV/c2 inv. Mass [MeV/c2] HADES C+C@2AGeV preliminary No Efficiency / Acceptance Correction

  3. NA60 STAR PHENIX

  4. Experimental Overview

  5. Hadrons in Collision small systems: penetrating probes continuous monitoring of evolution emission rates = ret. current-current correlator = ret. photon self-energy in medium probes the medium in all stages explore the phase diagram

  6. Road Map

  7. Emissivity of Matter spectral function V-A mixing no difference of deconfined and confined matter radiation kinetic approaches

  8. Measuring Temperatures 1. Universe WMAP 2. Heavy Ion Collisions use qq rate as test function for thermal yield add hadron cocktail, DY, open charm

  9. Pb + Au CERES 2004 40 GeV <T> = 145 MeV 158 GeV <T> = 170 MeV <T> = T_f.o. ?

  10. CERES 95, 96, 158 AGeV

  11. NA50: <T> = 170 MeV Issue: T vs. N

  12. Gallmeister et al: S beam: HELIOS-3, NA38, CERES Photons, too Low kT: Correction a la Arnold et al.

  13. Advanced Models fireball/hydro: T(t,x), n(t,x) Rapp ... Gale... Ruuskanen ... Srivastava ... Alam ... T(0), QGP vs. Hadron Gas SPS 158 AGeV transport: no sensitivity to deconfinement Cassing ... Stoecker ... Srivastava ... Bass ... Summary: T(0) > Tc molten rho further developments: jet radiation, correlations

  14. Predictions for RHIC Gallmeister, Kampfer, Pavlenko 1998 Turbile, Rapp, Gale 2003

  15. Charm charm at SPS within NA50 acceptance: fireball radiation = charm yield decision by NA60 charm at RHIC Ruuskanen, Vogt, ... Gallmeister: di-leptons from correlated open charm dominate Shuryak: energy loss of charm suppresses this yield

  16. 200 GeV ?

  17. sqrt(s) = 200 GeV, single e no energy loss of charm quarks ?

  18. Summary • many e+e-, mu+mu-, photon spectra • thermal radiation at CERN-SPS identified • T(0) > Tc: deconfinement • molten rho: chiral symmetry restoration • waiting for more precise spectra at RHIC • charm is at hand: minor energy loss • Shopping List: • NA60 data (abnormal open charm?) • pp and AA spectra • multi-differential spectra

  19. R. Rapp detailed space-time scenario

  20. adjust T_i, T_f to CERES data Issues: - chemical off-equilibrium in deconfined & hadron medium - baryon density effects

  21. 1. VDM: models V self-energies 2. 3. sum up all reaction channels Kinetic theory

  22. Emission Rate of Deconfined Matter 1. Dileptons Improved: Aurenche,Gelus, Morre, Zaraket (2000) Lattice QCD Bielefeld 2002 2. Photons Improved: Arnold, Moore, Yaffe (2001)

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