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Corollary
3 lessons learnt:
(1) At CERN SPS energies one is likely creating the same (less
- dense) strongly interacting matter as at RHIC. Indications of
- high pT suppression (need actual exp. confirmation !) are now
- more consistent w/ previous observations: J/ψ suppression, εBj, ...
(2) If we want to constraint / challenge parton energy loss models
(and we want to, in order to learn more about the properties of the dense QCD medium produced), we need more differential observables than (ratios of) spectra [RAA vs. azimuthal angle, ...].
(3) If we want to characterize quantitatively the properties of the produced media in A+A collisions (QGP,CGC), we need a
concurrent measurement of the p+p baseline at the same sqrt(s) ! [This applies for RHIC 62.4 GeV, but also for 5.5 TeV at CERN-
- LHC where we need to convince the “Higgs – beyond SM –
- SUSY...” community to run at ~1/3 of the nominal (maximal)
p+p collision energy].