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in subjects: "Su-4 Groups"  
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Quark model calculations of symmetry breaking in parton distributions

Description: Using a quark model, we calculate symmetry breaking effects in the valence quark distributions of the nucleon. In particular, we examine the breaking of the quark model SU(4) symmetry by color magnetic effects, and find that color magnetism provides an explanation for deviation of the ratio d{sub v}({chi})/u{sub v}({chi}) from 1/2. Additionally, we calculate the effect of charge symmetry breaking in the valence quark distributions of the proton and neutron and find, in contrast to other authors… more
Date: September 1, 1995
Creator: Benesh, C.J.; Goldman, J.T. & Stephenson, G.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Massless and massive monopoles carrying nonabelian magnetic charges

Description: The properties of BPS monopoles carrying nonabelian magnetic charges are investigated by following the behavior of the moduli space of solutions as the Higgs field is varied from a value giving a purely abelian symmetry breaking to one that leaves a nonabelian subgroup of the gauge symmetry unbroken. As the limit of nonabelian unbroken symmetry is reached, some of the fundamental abelian monopoles remain massive but acquire nonabelian magnetic charges. The BPS mass formula indicates that others… more
Date: October 1, 1996
Creator: Weinberg, E.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Petite unification: an alternative viewpoint

Description: It is assumed that at some distance scale, not too many orders of magnitude less than the compton wavelength of intermediate bosons W/sup + -/ and Z/sup 0/, the SU(3)/sub c/ x SU(2)/sub L/ x U(1)/sub Y/ gauge theory, characterized by three coupling constants, becomes embedded in a gauge theory G/sub S/ x G/sub W/ characterized by only two coupling constants, g/sub S/ and g/sub W/. The strong group G/sub S/ and weak group G/sub W/ are assumed each to be either simple or pseudo-simple i.e. a dire… more
Date: May 1, 1981
Creator: Hung, P.Q.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Determination of the chiral SU(4) x SU(4) breaking parameters

Description: Broken chiral SU(4) x SU(4) symmetry: from the observed mass spectrum of pseudoscalar charmed mesons the symmetry breakig parameters of the theory could be solved. It is found that both vacuum and Hamiltonian breaking play an important role as far as charmed states are concerned. Purely from the masses of D and F mesons the current algebra mass ratio m/sub c//m/sub s/ < 5 is deduced. This differs greatly from values obtained using linear or quadratic mass formulas. Considering eta, eta', and et… more
Date: June 1, 1978
Creator: Das, K.P. & Deshpande, N.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Unpaired Nucleons as Probes of Core Collective Fields

Description: Field theory techniques are applied to the study of interacting boson systems. A dynamical quasiparticle theory derived by the equations of motion method is compared with IBFM as a means of coupling an odd particle to IBM cores. For a single j-shell, the two models are found to be roughly equivalent on a phenomenological level. This equivalence requires that the IBFM parameter ..lambda../sub 0/ is a function of the core, SU(5) vs. SU(3) or O(6), but not an explicit function of the Fermi level. … more
Date: January 1, 1984
Creator: Leander, G.A.; Semmes, P.B. & Doenau, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SU(4) breaking and the new particles: some applications

Description: The applications for SU(4) breaking for new particles considered are an expression of the vector and axial vector weak charges of charmed hadrons and a relativistic mass formula for vector mesons. Wave functions defined in momentum space are considered. Quantum numbers of various meson resonances are found. (JFP)
Date: August 1, 1976
Creator: Sorba, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Lectures on the new particles

Description: An attempt is made to discuss systematics of new particles and their spectroscopy in a simple manner. The main emphasis is on charm and SU(4), weak decays of charmed mesons, hadronic masses, and charmonium. (SDF)
Date: August 18, 1976
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SU3 shell model calculations for light nuclei

Description: Shell model calculations in the supermultiplet SU-4/SU-3 basis are illustrated for several major shells of /sup 16/O. The classification scheme and its connection with the effective interaction are briefly discussed. (SDF)
Date: August 1, 1976
Creator: Millener, D. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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