The delta-hole model at finite temperature

Henning, Peter A.; Umezawa, H.

doi:10.1016/0375-9474(94)90713-7

Cited by 27 publications

(24 citation statements)

References 21 publications

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“…We found that the short range correlation largely suppresses the ph excitation but enhances the ∆h excitation very much. The pion dispersion relations are quite different from those calculated in the nonrelativistic approximation 2,8 . The short range correlation has a large effect on all branches of the pion dispersion relation.…”

Section: Discussioncontrasting

confidence: 73%

“…An alternative way to construct the short range correlation to the polarization insertion is as follows 8,12 :…”

Section: Shown Inmentioning

confidence: 99%

“…The main conclusion is that the pion condensation, or the space -like branch of the pion dispersion relation in the critical region -zero energy and finite momentum, is removed by the short range correlation. Recently, there are some quasi-relativistic calculations on the ∆h excitation of the pion propagator at finite temperature 8,9,10 ). In ref.…”

Section: Introductionmentioning

confidence: 99%

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The dispersion relation of the pion in nuclear matter

Liang-Gang¹,

Nakano²

1997

Nuclear Physics A

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We put forward a formalism to calculate the relativistic particle -hole and deltahole excitation polarization insertion for pion propagator by using the particle -holeantiparticle representation of nucleon and delta propagators in nuclear matter. The real and the imaginary part of the polarization insertion and the dispersion relation for pion propagator are calculated numerically. We find that the short range correlation enhances the delta -hole excitation but suppresses the particle -hole excitation, it also suppresses the pion condensation. We find that the effect of the short range correlation on the pion dispersion relation depends very much on the form of the short range correlation and the parameters involved.

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Section: Discussioncontrasting

confidence: 73%

“…An alternative way to construct the short range correlation to the polarization insertion is as follows 8,12 :…”

Section: Shown Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The dispersion relation of the pion in nuclear matter

Liang-Gang¹,

Nakano²

1997

Nuclear Physics A

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“…[50,10,51] such a procedure has been used in order to account for the finite ∆-isobar width in the pion self energy. We see that the value ImA R 0 given by eq.…”

Section: Contribution Of One-loop Diagram With Full Fermion Propagatorsmentioning

confidence: 99%

Classical and Quantum Many-Body Description of Bremsstrahlung in Dense Matter

Knoll¹,

Voskresensky²

1996

Annals of Physics

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Some considerations about the importance of coherence effects for bremsstrahlung processes in non-equilibrium dense matter (Landau -Pomeranchuk -Migdal -effect) are presented. They are of particular relevance for the application to photonand di-lepton production from high energy nuclear collisions, to gluon radiation in QCD transport, or parton kinetics and to neutrino and axion radiation from supernova explosion and from hot neutron stars. The soft behavior of the bremsstrahlung from a source described by classical transport models is discussed and pocket correction formulas for the in-matter radiation cross sections are suggested in terms of standard transport coefficients. The radiation rates are also discussed within a non-equilibrium quantum field theory (Schwinger -Kadanoff -Baym -Keldysh) formulation. A classification of diagrams and corresponding resummation in physically meaningful terms is proposed, which considers the finite damping width of all source particles in matter. This way each diagram in this expansion is already free from the infra-red divergences. Both, the correct quasi-particle and quasi-classical limits are recovered from this subset of graphs. Explicit results are given for dense matter in thermal equilibrium. The diagrammatic description may suggest a formulation of a transport theory that includes the propagation of off-shell particles in non-equilibrium dense matter.

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“…2 − -resonances is given by [53] (also see [54], who treated coupling of pions to resonance hole excitations)…”

Section: A Vector Meson Self Energiesmentioning

confidence: 99%

Dilepton production from hot hadronic matter in nonequilibrium

Schenke

Greiner

2006

Phys. Rev. C

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The influence of time dependent medium modifications of low mass vector mesons on dilepton yields is investigated within a nonequilibrium quantum field theoretical description on the basis of the Kadanoff-Baym equations. Time scales for the adaption of the spectral properties to changing self energies are given and, under use of a model for the fireball evolution, nonequilibrium dilepton yields from the decay of ρ-and ω-mesons are calculated. In a comparison of these yields with those from calculations that assume instantaneous (Markovian) adaption to the changing medium, quantum mechanical memory effects turn out to be important.

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The delta-hole model at finite temperature

Cited by 27 publications

References 21 publications

The dispersion relation of the pion in nuclear matter

The dispersion relation of the pion in nuclear matter

Classical and Quantum Many-Body Description of Bremsstrahlung in Dense Matter

Dilepton production from hot hadronic matter in nonequilibrium

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