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Introduction to heavy ion collisions at the NICA energy: What and How

Introduction to heavy ion collisions at the NICA energy: What and How. V. Toneev, JINR. THEORY of HADRONIC MATTER UNDER EXTREME CONDITIONS Dubna 31 October-03 November 2016. Progress in heavy-ion acceleration

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Introduction to heavy ion collisions at the NICA energy: What and How

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  1. Introduction to heavy ion collisions at the NICA energy: What and How V. Toneev, JINR THEORY of HADRONIC MATTER UNDER EXTREME CONDITIONS Dubna 31 October-03 November 2016

  2. Progress in heavy-ion acceleration SIS/GSI=> AGS/BNL=> SPS=> RHIC=> LHC √s [GeV]~ 2~5 ~20 => 200 ~2700 • M. Gazdzicki and M. I. Gorenstein, Acta Phys. Polon.B30, 2705 (1999), On the Early Stage of Nucleus--Nucleus Collisions, arXiv:hep-ph/9803462 • A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B673, 142 (2009) Onset of deconfinement in nucleus-nucleus collisions: Review for pedestrians and experts, arXiv:1006.1765 A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B 673 673 673 673 673 673 , 142 (2009 , 142 (2009 , 142 (2009 , 142 (2009 , 142 (2009 , 142 (2009

  3. NN NN NN NN NN . . . . . NN . id id id id id id Schematic statistical model p=p_id−B , ε=ε_id+B F~s0.25 M. Gazdzicki, M. I. Gorenstein, Acta Phys. Polon.B30, 2705 (1999) − − − = = = p p p = = = p p p B , ε B , ε B , ε ε ε ε + + + B B B F F F F F ≈ ≈ ≈ ≈ ≈ s s s s s F ≈ s 0 0 0 0 0 0 25 25 25 25 25 25 . . . . .

  4. Experimental evidence of horn and step Horn Step Inverse slope parameter T of K+ transverse mass spectra. arXiv:1301.5823 K+/π+ yield ratio at midrapidity, arXiv:1301.5823

  5. Model comparison with dynamical models The inverse slope parameter T of the K+ transverse momentum spectrum The ratio dependence of the strangeness to pion yields, arXiv:1301.5823

  6. EM fields and anomalous effects/transport ● A moving charge radiates => charge-dependent v1 in asymmetricnuclear collisions (evidences on creation of strong EM fields). EM fields may induce novel effects deeply related to the topology and symmetry of QCD and QED ● ● ● vorticity chiral magnetic waves… arXiv:1511.04050 Search for new observables (isobar nuclear collisions to isolate CME) ●

  7. Cumulant ratios Central 0-5% Cumulant ratios Energy dependence of cumulant ratios (Sσ, kσ2) of net-proton, net-kaon and net-charge multiplicity distributions for AuAu collisions, arXiv:1606.03900.

  8. Directed flow Beam energy dependence of dv1/dy for particles (left) and antiparticles (right) in 10-40% AuAu collisions (arXiv:1610.07423)

  9. Some puzzles Energy dependence of combinations of HBT radii sensitive to expansion velocity (a) and emission duration (b). (arXiv:1610.05025) Difference in v2 for particles and antiparticles as a function of energy (PRL 110,142301 (2013))

  10. Dynamical models for HIC • Dissipative Hydrodynamics (there are many versions of the model with different EoS but only few are applied to the NICA energy) • Kinetic models (PHSD:hadron and parton degrees of freedom, crossover phase transition, QGSM, UrQMD, …) • Hybrid models (marriage of hydro and kinetics) • Chiral models (first attempts – partial restoration of chiral symmetry) • Holographic models (first steps toward this direction )

  11. Other approaches ● Lattice QCD for systems with finite baryonic chemical potential (there are many contribution papers to this meeting) ● Functional continuum methods (Current-currentcorrelators, QCD phase structure, hadron properties from Dyson-Schwinger equations…)

  12. Concluding remark There is still a lot of theoretical work

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