survey of issues misak sargsian florida international university
TRANSCRIPT
Survey of IssuesMisak Sargsian
Florida International University
Structure of the NucleonStructure of the Nucleon
Nuclear MatterNuclear Matter
Electromagnetic Interaction
Strong Interaction
Quark Degrees of Freedom
Neutron Stars
Pandharipande, Heiselberg, 2000
Microscopic Structure of NN Interactionand 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, WatsonPRL 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,pt
d
e
e’
x,
Q2
