survey of issues misak sargsian florida international university
TRANSCRIPT
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Survey of IssuesMisak Sargsian
Florida International University
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Structure of the NucleonStructure of the Nucleon
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Nuclear MatterNuclear 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 Interactionand 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, WatsonPRL 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,pt
d
e
e’
x,
Q2
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