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RHIC-II EoS working groupEoS Physics Program #1 1. What physics topics are to be addressed? 2. What observables are sensitive to this physics? 3. Where.

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Presentation on theme: "RHIC-II EoS working groupEoS Physics Program #1 1. What physics topics are to be addressed? 2. What observables are sensitive to this physics? 3. Where."— Presentation transcript:

1 RHIC-II EoS working groupEoS Physics Program #1 1. What physics topics are to be addressed? 2. What observables are sensitive to this physics? 3. Where do we stand and what have we learned so far? EoS working group: mission & status Conveners:Steffen A. Bass Helen Caines Julia Velkovska

2 RHIC-II EoS working groupEoS Physics Program #2 Physics Questions to be addressed 1.What is the equation of state? 2.Is there a phase transition? 3.Where is the soft point? 4.Is there thermalization? 5.Character of the medium and dissipative effects 6.How does hadronization occur? 7.Freeze-out

3 RHIC-II EoS working groupEoS Physics Program #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

4 RHIC-II EoS working groupEoS Physics Program #4 Lattice and EoS No surprise to Lattice people that didn’t reach SB limit Karsch

5 RHIC-II EoS working groupEoS Physics Program #5 Lattice and Viscosity What is the viscosity? – Answer not coming from Lattice Karsch

6 RHIC-II EoS working groupEoS Physics Program #6 All Hydro. not the same PHENIX white paper, nucl-ex/0410003 elliptic flow p T spectra p  Hirano Teaney

7 RHIC-II EoS working groupEoS Physics Program #7 v2v2 v3v3 viscosity is a dissipative effect drive local equilibrium towards global equilibrium. So higher viscosity means lower v 2, and also lower v 3, v 4, etc. (v 1 is a special case, since it obeys a sum rule). A method to extract Viscosity Colliding asymmetric systems will allow us access to odd values of v n 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 Stankus

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

9 RHIC-II EoS working groupEoS Physics Program #9 Recombination and charm flow V 2q from , p, K, L Coalescence can predict v 2D for v 2c = 0 V 2 of electrons V.G. et al., PLB595 (04) 202 Direct charm better

10 RHIC-II EoS working groupEoS Physics Program #10 Thermal Photons D.d'E. & D.Peressounko nucl-th/0503054 Au+Au 0-10% central ( = 3.2 fm) d’Enterria

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

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

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

14 RHIC-II EoS working groupEoS Physics Program #14 U+U to test Hydro limit Kuhlman Possible with EBIS Could be possible before LHC

15 RHIC-II EoS working groupEoS Physics Program #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? Need an energy/species scan to “turn off” QGP and follow evolution of the EoS. v 2 from direct charm measurement Separating Hydro/Reco/pQCD regimes needs high statistics data at “high” p T. PID needed These need high statistics so high luminosity Need to keep forward physics capabilities Support for our Theorists Yes

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