9,056 research outputs found
Correlations and the Dirac Structure of the Nucleon Self-Energy
The Dirac structure of the nucleon self-energy in symmetric nuclear matter as
well as neutron matter is derived from a realistic meson exchange model for the
nucleon-nucleon (NN) interaction. It is demonstrated that the effects of
correlations on the effective NN interaction in the nuclear medium can be
parameterized by means of an effective meson exchange. This analysis leads to a
very intuitive interpretation of correlation effects and also provides an
efficient parametrization of an effective interaction to be used in
relativistic structure calculations for finite nuclei.Comment: 16 pages, 11 Figures include
Matter near to the Endpoint of the Electroweak Phase Transition
Wave functions and the screening mass spectrum in the 3D SU(2)-Higgs model
near to the phase transition line below the endpoint and in the crossover
region are calculated. In the crossover region the changing spectrum versus
temperature is examined showing the aftermath of the phase transition at lower
Higgs mass. Large sets of operators with various extensions are used allowing
to identify wave functions in position space.Comment: 3 pages, 8 figures, LaTex+espcrc2.sty; LATTICE98(electroweak
Reply to ``Comment on `Test of constancy of speed of light with rotating cryogenic optical resonators' ''
An improved analysis of the Michelson-Morley-type experiment by P. Antonini
et al. (Phys. Rev. A. 71, 050101 (2005)) yields the Robertson-Mansouri-Sexl
theory parameter combination and the Standard Model Extension theory parameter
.Comment: 2 page
Confinement, deconfinement and the photon propagator in 3D cQED on the lattice
We report on a lattice study of the gauge boson propagator of 3D compact QED
in Landau gauge at zero and finite temperature. Non-perturbative effects are
reflected by the generation of a mass m and by an anomalous dimension alpha.
These effects can be attributed to monopoles and are absent in the propagator
of the regular part of the gauge field.Comment: 3 pages, 4 figures, talk presented by A.S. at 5th International
Conference on Quark Confinement and the Hadron Spectrum, Gargnano, Italy,
10-14 Sep 200
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