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Quark Matter 2009

Quark Matter 2009. Nu’s One day summary: Focus on issues related to QCD phase diagram. Lattice : QCD Critical Point. Expectation value of an observable. M : Dirac Matrix S G : Gluonic action. For  > 0 the quark determinant becomes complex.

nelle-atkinson
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Quark Matter 2009

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  1. Quark Matter 2009 Nu’s One day summary: Focus on issues related to QCD phase diagram

  2. Lattice : QCD Critical Point Expectation value of an observable M : Dirac Matrix SG : Gluonic action For > 0 the quark determinant becomes complex Issue for non Zero , Det M is not positive definite -- Sign problem • Four approaches • Reweighting : Z = < e-S()det D() / e-S(0)det D(0) >=0 • Taylor expansion of thermodynamic observables in /T about  = 0 • Imaginary chemical potential :  imaginary, fermion determinant positive • Canonical ensemble - predicts existence of QCD critical point (TE ~ 160 MeV and E ~ 600 MeV, m ~ 700 MeV) QM09 poster : A. Li

  3. Results on Higher Moments QM09 : T.K. Nayak, B. Mohanty Net Protons First look at net-protons First look at higher moments STAR Preliminary Setting the baseline for the future QCD critical point search program

  4. Future Programs • Partonic Collectivity! • De-confinement! • Higher moments! • Conserved quantities: • baryons (~ net protons) • charge • strangeness • - long range fluctuations • - higher sensitivity • - critical point search STARPreliminary

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