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Dileptons and Photons at Collider Energies

Dileptons and Photons at Collider Energies. K. Dusling , C.H. Lee and I . Zahed. QM14. Outline. Set up Rates, Evolution Experiments. Formally. acceptance. evolution. rate. time. Rates: Hadrons. Equilibrium averaging. l +. l +. l -. l -. Resonance Gas. + …. 1,2,3, …-Pi,.

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Dileptons and Photons at Collider Energies

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  1. Dileptons and Photons at Collider Energies K. Dusling, C.H. Lee and I. Zahed. QM14

  2. Outline • Set up • Rates, • Evolution • Experiments

  3. Formally acceptance evolution rate time

  4. Rates: Hadrons

  5. Equilibrium averaging l+ l+ l- l-

  6. Resonance Gas + … 1,2,3, …-Pi, 1,2,3-N + … Chiral Reduction

  7. Vector-Axial Mixing: κ κ Chiral Limit and zero-mtm pion:

  8. VA-Mixing explicitly Dey, Eletsky, Ioffe 96

  9. Rates

  10. Electric Conductivity:

  11. Flavour Susceptibility:

  12. Rates: sQGP

  13. sQGP: l+ l+ l- l- Hansson and Zahed 91’

  14. sQGP Rates

  15. Evolution

  16. Sample hydro evolution Faster cooling x higher rates: same

  17. V2 Flow @ 2.76 TeV

  18. Dileptons: NA60, Phenix, Star

  19. NA60 : dN/dη=140 95’

  20. PHENIX: 07’ Only!

  21. Beam Energy Scan: STAR 13’

  22. Photons: WA90, PHENIX

  23. WA98 0<qT (GeV) <4 0<qT (GeV)<0.8

  24. PHENIX RHIC1 RHIC2

  25. V2 PHENIX

  26. Achievements • EM “OK”* • LxR “restored” • QGP “visible” • V2 “low” (* π<<ρ)

  27. Na45: 95’ Phenix: 07’ Na60:03’ Star: 13’

  28. Vector Spectral Function

  29. PHENIX extrapolation: γ PHENIX: M<<qv 1 15% Systematics!

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