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Survey of Issues Misak Sargsian Florida International University

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Structure of the Nucleon

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Nuclear Matter Electromagnetic Interaction Strong Interaction

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Quark Degrees of Freedom Neutron Stars

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Pandharipande, Heiselberg, 2000

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Microscopic Structure of NN Interaction and properties of Dense Nuclear Matter Degenerate neutron and electron Fermi Gas Oppenheimer-Volkoff model, 1939 Observational

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Microscopic Structure of NN, NNN,... Interactions NN interaction

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In the Lab

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How to get nucleons close together Probing at large relative momenta In the Lab

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Day,Frankfurt, MS, Strikman, PRC 1993

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Egiyan, et al PRC 2004

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Egiyan, et al PRL 2006

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What we Learned from A(e,e)X Reactions

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neutron proton 6p and 6n rate calculate the expected proton rate

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92% of the time two-nucleon high density fluctuations are ptoron and neutron 4% of the time proton-proton or neutron-neutron Piasetzky, Sargsian, Strikman, Frankfurt, Watson PRL 2006 Important Implication for the structure of the neutron stars

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3N Intercation Relativistic Effects Effectively Repulsive ?

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In the Lab

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Chemical Potential and Quantum Field Classical Thermodynamics for Open Systems Added energy due to Ni matter introduced to the system Diffusive Equilibrium

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Particles in the Cold Dense Matter Everything may change when kinetic energy of NN system exceeds 300 MeV The system becomes effectively open Particles which leave the star do not contribute in

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Kaon Condensation Interaction is attractivekaon energy decreases with density Strangeness Enhancement

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In the Lab The role of in High Density Fluctuations Role of the Strangeness in High Density Fluctuations Hyperon N interaction Chiral Restoration

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Chiral Restoration and Hidden Color In the world where chiral symmetry is broken Deuteron (t=0,s=1) two nucleons two-separately color neutral objects In the world where chiral symmetry is unbroken Signature of Chiral Simmetry Restoration with an increase of internal momenum in the deuteron Survey Experiments

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with an increase of internal momenum in the deuteron

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Quark Matter Estimates done within Bag Model

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In the Lab Probing superfast quarks

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Hard Disintegration N N d

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Modification of quark distributions in nucllei (EMC effect) α,p t d e e x, Q 2

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