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EoS working group: mission & status

EoS working group: mission & status. What physics topics are to be addressed? What observables are sensitive to this physics? Where do we stand and what have we learned so far?. Physics Questions to be addressed. What is the equation of state? Is there a phase transition?

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EoS working group: mission & status

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  1. EoS working group: mission & status • What physics topics are to be addressed? • What observables are sensitive to this physics? • Where do we stand and what have we learned so far? RHIC-II EoS working group

  2. Physics Questions to be addressed • What is the equation of state? • Is there a phase transition? • Where is the soft point? • Is there thermalization? • Character of the medium and dissipative effects • How does hadronization occur? • Freeze-out RHIC-II EoS working group

  3. Agenda Lattice Calc. about the EoS – Karsch EBIS source and RHIC-II beams – Fischer 3-D Hydro – Hirano Viscous Hydro – Teaney Updates from Reco – Greco Constraining EoS with Thermal photon – d’Enterria Femtography – Panitkin What have we learnt about EoS from experiment – Witt Using U+U – Kuhlman Assymetric Collisions - Stankus RHIC-II EoS working group

  4. Lattice and EoS Karsch No surprise to Lattice people that didn’t reach SB limit RHIC-II EoS working group

  5. Lattice and Viscosity Karsch What is the viscosity? – Answer not coming from Lattice RHIC-II EoS working group

  6. All Hydro. not the same p p Hirano Teaney elliptic flow PHENIX white paper, nucl-ex/0410003 pT spectra RHIC-II EoS working group

  7. A method to extract Viscosity Stankus viscosity is a dissipative effect drive local equilibrium towards global equilibrium. So higher viscosity means lower v2, and also lower v3, v4, etc. (v1 is a special case, since it obeys a sum rule). v3 v2 Colliding asymmetric systems will allow us access to odd values of vn Is v3 more sensitive than v2 to viscosity? Need Hydro with viscosity to answer Need 3-D hydro to answer Currently work on 3-D hydro and hydro+viscosity Need to combine Hydro with cascade with Reco RHIC-II EoS working group

  8. Duke Recent Reco progress • Higher fock states now included • Resonances now included • Neither have big effect • breaking of the scaling at high pT to be test Greco RHIC-II EoS working group

  9. V2q from p, p, K, L Coalescence can predict v2D for v2c = 0 Recombination and charm flow V2 of electrons Direct charm better RHIC-II EoS working group V.G. et al., PLB595 (04) 202

  10. Thermal Photons Au+Au 0-10% central (<b> = 3.2 fm) D.d'E. & D.Peressounko nucl-th/0503054 d’Enterria RHIC-II EoS working group

  11. QGP “EoS” from thermal g& hadron multiplicities (I) • correlatingthermal g slopes & hadron multiplicities • Evolution of the effective # of degrees of freedom, g(s,T), with centrality: • . QGP “plateau” should be observable in the data. RHIC-II EoS working group

  12. Low Energy running to see step Energy ~ 40 GeV Au-Au needed D.d'E. & D.Peressounko (in preparation) 62.4 GeV RHIC-II EoS working group

  13. HBT and Energy scan No peak seen in data so far. Energy scan could find the soft point Panitkin Need theory work to solve HBT puzzles RHIC-II EoS working group

  14. U+U to test Hydro limit • Possible with EBIS • Could be possible before LHC Kuhlman RHIC-II EoS working group

  15. Summary • Much data out there the Theory is “catching” up. We can learn a great deal about EoS with present data Do we need RHIC-II for EoS? Yes Need an energy/species scan to “turn off” QGP and follow evolution of the EoS. v2 from direct charm measurement Separating Hydro/Reco/pQCD regimes needs high statistics data at “high” pT. PID needed These need high statistics so high luminosity Need to keep forward physics capabilities Support for our Theorists RHIC-II EoS working group

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