FYI > > Dear Nu, Wit, Flemming and Steve, > > I am happy to announce that in one week's time, the > PHENIX Collaboration will submit a paper to PRL on > the topic indicated in the subject line. Please find the > title and abstract below. This analysis was presented > at QM09. > > best regards, > Barbara > > ----------------------------------------------------- > Title: Azimuthal anisotropy of pi0 production in Au+Au collisions at > sqrt s_NN = 200 GeV: Path-length dependence of jet-quenching and > the role of initial geometry > > Abstract: > We have measured the azimuthal anisotropy of pi0's for 1 < pT < 18 > GeV/c > for Au+Au collisions at sqrt s_NN = 200 GeV. The observed anisotropy > shows > a gradual decrease in 3 < pT < 7 - 10 GeV/c but remains positive > beyond > 10 GeV/c. The magnitude of this anisotropy is under-predicted, up to > at least > ~ 10 GeV/c, by current perturbative QCD (pQCD) energy-loss model > calculations. > An estimate of the increase in anisotropy expected from initial- > geometry > modification due to gluon saturation effects and initial-geometry > fluctuations > is insufficient to account for this discrepancy. Calculations which > implement a > path length dependence steeper than what is implied by current pQCD > energy-loss models, show reasonable agreement with the data. _______________________________________________ Brahms-l mailing list Brahms-l_at_lists.bnl.gov https://lists.bnl.gov/mailman/listinfo/brahms-lReceived on Sat Jun 12 2010 - 02:04:40 EDT
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