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Theoretical Insights into Heavy Quark Systems and Exotic Hadrons in Quark-Gluon Plasma

This presentation by the Yonsei Theoretical Hadron Physics group, led by Professor Su Houng Lee, delves into key concepts in hadron physics, particularly focusing on heavy quark systems within quark-gluon plasma (QGP) and the nature of exotic hadrons like pentaquarks and tetraquarks. Utilizing QCD spectral sum rules and AdS/QCD approaches, the group explores the implications of J/ψ suppression in heavy ion collisions and examines stable multiquark configurations. This comprehensive overview aims to elucidate the relevance of these findings to ongoing research in high-energy physics.

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Theoretical Insights into Heavy Quark Systems and Exotic Hadrons in Quark-Gluon Plasma

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  1. Theoretical hadron physics@ Yonsei Group members Professor : Su Houng Lee Postdoc : Sungtae Cho Ph.D Course : Kyung-il Kim, Woosung Park M.S. Course : Hyojin Park, Kiesang Jeong Hyejin Kim K.I.Kim

  2. Outline • Heavy quark system in quark-gluon plasma • Exotic hadrons • AdS/QCD approaches to dense matter • Summary K.I.Kim

  3. Heavy quark system in quark-gluon plasma K.I.Kim

  4. Quark-Gluon Plasma What is the quark-gluon plasma(QGP)? K.I.Kim

  5. T< 1.6 Tc T> 1.6 Tc J/y peak at 3.1 GeV J/Ψ Suppression 1986: Matsui and Satz claimed J/y suppression is a signature of formation of Quark Gluon Plasma in Heavy Ion collision Quenched lattice calculation by Asakawa and Hatsuda using MEM K.I.Kim

  6. * Bethe-Salpeter Equation Heavy bound state 1951 : Salpeter & Bethe kernel Bound State of Charmonium

  7. * LO result quark gluon

  8. Exotic Hadrons K.I.Kim

  9. Exotic hadrons <Exotic Hadrons?> Pentaquark Tetraquark q q q q q q q q q K.I.Kim

  10. Stable Multiquark configurations in a schematic diquark model SHLee and S.Yasui : EPJ C (2009) <Diquark inside baryons> K.I.Kim

  11. <Quark-antiquark inside mesons> Quark-antiquark interaction is 3 times stronger than diquark interaction. K.I.Kim

  12. Stable mutiquark configuration <Heavy Tetraquark> q u q Vs. u q d d q K.I.Kim

  13. QCD Sum Rule The two point correlation function, A narrow resonance approximation Ex) The Borel Transformation K.I.Kim

  14. QCD sum rules X(3872): SHL, K. Morita, M. Nielsen (PRD08) • J=[s][V] Tetraquark current vs. J=DD* Molecular current Small width <2 MeV

  15. Cont- Z(4430) : SHL, K. Morita, M. Nielsen (PRD08) • J=D1 D* Molecular current width = 40 MeV

  16. AdS/QCD approaches to dense matter K.I.Kim

  17. AdS/QCD ? <Whatis the AdS/QCD approach?> AdS/CFT : J.M. Maldecena (1998) Correspondence between strongly interacting gauge theory And weakly interacting super gravity. <AdS/CFT Dictionary> K.I.Kim

  18. AdS5 Background and Hardwall Model <AdS Backgrond> <Hardwall Model> z UV IR AdS5 space is compactified such that K.I.Kim

  19. Nucleons in Finite Densities The effective action for nucleons, The expectation value of field X, The equation of motion is given by

  20. The Chemical Potentials Domokos and Harvey, Phys.Rev.Lett.99:141602,2007 Solving the vector field equation of motion at zero momentum yields must be proportional to the quark chemical potential The Euclidean action is equal to the grand canonical potential In generalized gauge symmetry to

  21. Nucleon Mass and Quark Condensate

  22. Summary • Theoretical hadron physics group in Yonsei is interested in heavy quark system in QGP and exotic hadrons. • Using QCD spectral sum rule and AdS/QCD approaches we have studied hadron physics. K.I.Kim

  23. Thank you !! K.I.Kim

  24. Back-up Slides K.I.Kim

  25. RHIC and LHC The Relativistic Heavy Ion Collider (RHIC) is a heavy-ioncollider located at and operated by Brookhaven National Laboratory (BNL) in Upton, New York The Large Hadron Collider (LHC) is a particle accelerator located at CERN, near Geneva, Switzerland. It lies in a tunnel under France and Switzerland. LHC K.I.Kim

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