Survey of Issues Misak Sargsian Florida International University.

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Presentation transcript:

Survey of Issues Misak Sargsian Florida International University

Structure of the Nucleon

Nuclear Matter Electromagnetic Interaction Strong Interaction

Quark Degrees of Freedom Neutron Stars

Pandharipande, Heiselberg, 2000

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

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

In the Lab

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

Day,Frankfurt, MS, Strikman, PRC 1993

Egiyan, et al PRC 2004

Egiyan, et al PRL 2006

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

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

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

3N Intercation Relativistic Effects Effectively Repulsive ?

In the Lab

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

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

Kaon Condensation Interaction is attractivekaon energy decreases with density Strangeness Enhancement

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

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

with an increase of internal momenum in the deuteron

Quark Matter Estimates done within Bag Model

In the Lab Probing superfast quarks

Hard Disintegration N N d

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