119276344
Electro-magnetic waves within a model for charged solitons
We analyse the model of topological fermions (MTF), where charged fermions are treated as soliton solutions of the field equations. In the region far from the sources we find plane waves solutions with the properties of electro-magnetic waves.
33707506
Field strength and monopoles in dual U(1) lattice gauge theory
In any Abelian gauge theory with an action periodic in the link variables one can perform a duality transformation not only in the partition function, but also in correlation functions including Polyakov loops. The calculation of expectation values in the confinement phase, like electric field strength or monopole currents in the presence of external charges, becomes significantly more efficient simulating the dual theory. We demonstrate this using the ordinary Wilson action. This approach also allows a quantitative analysis of the dual superconductor model, because the dual transformed U(1) theory can be regarded as limit of a dual non-compact Abelian Higgs model. In this way we also try to interpret the behaviour of monopole condensate and string fluctuations. Finally we present some applications for simulating the dual U(1) gauge theory.
123155972
Deconfining phase in QCD
Abstract We argue that in the canonical ensemble description of full QCD there exist domains of different Z ( N ) phases which are degenerate and possess normal physical properties. This contradicts the predictions of the grand canonical ensemble. Further, we propose a new order parameter to test the realization of the discrete Z ( N ) symmetry at finite temperature and calculate it for the case of Z (2) gauge fields coupled to fundamental fermions.
67814691
Some Cautionary Remarks on Abelian Projection and Abelian Dominance
Abstract Some critical remarks are presented, concerning the abelian projection theory of quark confinement.
118692902
Quark multiplet potentials with dynamical quarks on the lattice
We calculate the static interquark potential between color sources in higher multiplet representations within the framework of lattice QCD. For pure gluon exchange the triplet potential shows linear behavior and the octet potential is screened. In the presence of sea quarks all potentials become screened. We try to explain the relation within a multiplet family by a Casimir scaling law.
15560655
Direct Laplacian Center Gauge
We introduce a variation of direct maximal center gauge fixing: the ``direct laplacian'' center gauge. The new procedure overcomes certain shortcomings of maximal center gauge, associated with Gribov copies, that were pointed out by Bornyakov et al. in hep-lat/0009035.
124960626
Beam characterization with video imaging systems at the ANL 50 MeV H/sup -/ beamline
Video imaging systems consisting of scintillators, charge-coupled device (CCD) cameras, and in-beam CCD detectors are being used to characterize beams at the Argonne National Laboratory (ANL) 50 MeV H/sup -/ beamline. The characterization technique consists of placing pinholes, slits, or wires in the beam and viewing the resulting images or shadows on a downstream scintillator or CCD. The images are digitally recorded using a frame grabber and stored in computer memory where they are analyzed to determine Twiss parameters and local beam divergence. Since many of the measurements involve low-intensity beams and require good position resolution, studies have been performed on scintillators to obtain sensitivity and resolution data. Various scintillators, including Rarex, CsI, and CaF/sub 2/, have been evaluated. An in-beam CCD imager has also been tested.<<ETX>>
22020112
Operating Experience with the Resonance Extraction Slow Spill Control System at the Zero Gradient Synchrotron
Simultaneous resonance extraction to two proton lines became operational in spring of 1975. The spill quality was initially poor due to 100% structure in the two to six kHz range. This paper describes the empirical techniques developed to provide a smooth spill. These techniques consist of applying radial or azimuthal disturbances to the proton beam. It has been found that the most effective disturbing frequency depends uniquely on the beam momentum. Quite an array of new equipment had to be built for magnetic control of the unbunched beam. Brief descriptions of this equipment are provided.