1. Dileptons and Photons K. Dusling and I. Z. BNL 09

2. Outline Motivation Rates Evolution Experiments

3. NA45: 95

4. NA60: 03

5. Phenix: 07

6. Rate: Formally

7. Acceptance: NA60 vs PHENIX

8. Hadronic Rates

9. Dilepton Production l+ l- l+ l-

10. Expand in Stable Hadrons +2+3, …-Pi, +2+3, …-K Resonance Gas: J=ρ+ρ’+.. +2+3, …-N

11. Many Feyman Graphs: + + …

12. How to reduce

13. Asymptotics: Broken CS

14. In Practice: NF=2 Chiral Limit and zero-mtm pion:

15. VA Mixing=LxR Restoration? Dey, Eletsky, Ioffe 96

16. Expansion Parameter:  = 0 Dilute!

17. 2-pion Final state:

19. ΠV and ΠA

20. Data :  e+e-   Decay.

21. 1 Nucleon Final State = 1 Loop ChPT N-  Transition +

22. Input at the Photon Point   N background

23. VA Mixing in T=180 MeV

24. VA Mixing in a 1 a 1 T=150 MeV μb=225 MeV

25. QGP Rates

26. wQGP: l+ l-l- l-

27. wQGP: LPM Effect: Aurenche et al 02

28. wQGP: γ Collinear Enhancement+ LPM Effect : Arnold, Moore, Yaffe 01

29. sQGP: OPE Hansson and Zahed 91

30. Hydro Evolution

31. Hydro Parameters SPS, RHIC and LHC

32. Fireball: NA60

33. Thermal Freeze-out Cooper-Frye

34. Chemical Freezeout: Fireball cools faster x Rates higher = w/μπ !

35. NA60

36. NA60 : dN/dη=140

37. Pt Spectra: Intermediate

38. NA60 dimuons : Upshots 1.Hadronic emission dominant: VA mixing 2.Partonic emission small: tiny QGP 3.Blue shifted spectra (M=rho): small Lh? 1.Hadronic emission dominant: VA mixing 2.Partonic emission small: tiny QGP 3.Blue shifted spectra (M=rho): small Lh?

39. Phenix: Dileptons

40. pT spectra: Wπ+Wππ

41. MIGHTY FILTER!

42. PHENIX Dusling+Z 07 Dusling+Z 09

43. PHENIX DI-electrons : Upshots 1.Hadronic large but Filtered: M<500 MeV 2.Partonic large and dominant: 100<M<250 !! 3.Hadronic large and dominant: M=ρ-ω-φ 4.Non-thermal emission: 300<M<500 MeV. Another DLS-like puzzle? 1.Hadronic large but Filtered: M<500 MeV 2.Partonic large and dominant: 100<M<250 !! 3.Hadronic large and dominant: M=ρ-ω-φ 4.Non-thermal emission: 300<M<500 MeV. Another DLS-like puzzle?

44. Phenix: Photons

45. Versus Kinetic Turbide, Rapp, Gale 04; Liu, Rapp 07

46. WA98 0<qT (GeV) <4 0<qT (GeV)<0.8 N:x2

47. Rates at RHIC RHIC1 RHIC2

48. PHENIX RHIC1 RHIC2

49. PHENIX extrapolation

50. Systematics of the Extrapolation 15% Systematics!

51. LHC: √s=5.5 TeV 0<qT(GeV)<2 1<qT (GeV)<5

52. WA98 and PHENIX Photons : Upshots 1.WA98: Hadronic emission of photons dominated by hadrons: M<2 GeV 2.PHENIX, LHC: Hadrons dominant for M<1GeV. QGP ‘visible’ around 1.5GeV. 1.WA98: Hadronic emission of photons dominated by hadrons: M<2 GeV 2.PHENIX, LHC: Hadrons dominant for M<1GeV. QGP ‘visible’ around 1.5GeV.