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AbstractAbstract

[en] The significance of multiphonon structures as a basic excitation mode, covering the entire supersymmetric multiplet of U(6/4) is shown. (K.A.)

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Bex, M.; Galin, J. (eds.); Grand Accelerateur National d'Ions Lourds (GANIL), 14 - Caen (France); [348 p.]; Sep 1996; p. 49; 8 refs.

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Xin-Heng, Guo; Tao, Huang; Chuang, Wang

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

AbstractAbstract

[en] The renormalization group invariant quark condensate μ is determinate both from the consistent equation for quark condensate in the chiral limit and from the Schwinger-Dyson (SD) equation improved by the intermediate range QCD force singular like δ (q) which is associated with the gluon condensate. The solutions of μ in these two equations are consistent. We also obtain the critical strong coupling constant αc above which chiral symmetry breaks in two approaches. The nonperturbative kernel of the SD equation makes αc smaller and μ bigger. An intuitive picture of the condensation above αc is discussed. In addition, with the help of the Slavnov-Taylor-Ward (STW) identity we derive the equations for the nonperturbative quark propagator from SD equation in the presence of the intermediate-range force is also responsible for dynamical chiral symmetry breaking. (author)

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Jul 1997; 31 p; 32 refs., 2 figs.

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Koshkarov, A.L.

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

AbstractAbstract

[en] Continuous dual symmetry in electrodynamics, Yang-Mills theory and gravitation is investigated. Dual invariant which leads to badly nonlinear motion equations is chosen as a Lagrangian of the pure classical dual nonlinear electrodynamics. In a natural manner some dual angle which is determined by the electromagnetic strengths at the point of the time-space appears in the model. Motion equations may well be interpreted as the equations of the standard Maxwell theory with source. Alternative interpretation is the quasi-Maxwell linear theory with magnetic charge. Analogous approach is possible in the Yang-Mills theory. In this case the dual-invariant non-Abelian theory motion equations possess the same instanton solutions as the conventional Yang-Mills equations have. An Abelian two-parameter dual group is found to exist in gravitation. Irreducible representations have been obtained: the curvature tensor was expanded into the sum of twice anti-self-dual and self-dual parts. Gravitational instantons are defined as (real )solutions to the usual duality equations. Central symmetry solutions to these equations are obtained. The twice anti-self-dual part of the curvature tensor may be used for introduction of new gravitational equations generalizing Einstein''s equations. However, the theory obtained reduces to the conformal-flat Nordstroem theory

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1997; 23 p; 17 refs. Submitted to the journal, Teoreticheskaya i Matematicheskaya Fizika.

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Kovalev, V.F.; Shirkov, D.V.

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

AbstractAbstract

[en] An original approach to constructing special type symmetries for boundary value problems, renormgroup symmetries, is reviewed. It is applied to a system of geometric optics equations. New solutions to the laser beam self-focusing problem are presented

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1997; 15 p; 16 refs., 2 figs. Submitted to the Khokhlov Special Memorial Issue of 'Journal of Nonlinear Optics Physics amd Materials'.

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Dicus, D.A.; Mohapatra, R.N.; Teplitz, V.L.

Texas Univ., Austin, TX (United States). Dept. of Physics. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States)

Texas Univ., Austin, TX (United States). Dept. of Physics. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States)

AbstractAbstract

[en] In supergravity models with low supersymmetry breaking scale the gravitinos can be superlight, with mass in the 10

^{-6}eV to few keV range. In such a case, gravitino emission provides a new cooling mechanism for protoneutron stars and therefore can provide constraints on the mass of a superlight gravitino. This happens because the coupling to matter of superlight gravitinos is dominated by its goldstino component, whose coupling to matter of superlight gravitinos is dominated by its goldstino component, whose coupling to matter is inversely proportional to the scale of supersymmetry breaking and increases as the gravitino mass decreases. Present observations therefore provide lower limits on the gravitino mass. Using the recently revised goldstino couplings, we find that the two dominant processes in supernova cooling are e^{+}e^{-}→ GG and γ+e^{-}→ e^{-}GG. They lead to a lower limit on the supersymmetry breaking scale Λ_{s}from 160 to 500 GeV for core temperatures 30 to 60 MeV and electron chemical potentials 200 to 300 MeV. The corresponding lower limits on the gravitino mass are .6 - 6 x 10^{-6}eVPrimary Subject

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1997; 8 p; UTEXAS-HEP--97-19; UMD-PP--98-07; SMU-HEP--97-12; CONTRACT FG03-93ER40757; GRANT PHY-9421386; ALSO AVAILABLE FROM ALSO AVAILABLE FROM OSTI AS DE98000406; NTIS; US GOVT. PRINTING OFFICE DEP

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Shadmi, Yael; Cheng, Hsin-Chia

Fermi National Accelerator Lab., Batavia, IL (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

Fermi National Accelerator Lab., Batavia, IL (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

AbstractAbstract

[en] Starting with two supersymmetric dual theories, we imagine adding a chiral perturbation that breaks supersymmetry dynamically. At low energy we then get two theories with soft supersymmetry-breaking terms that are generated dynamically. With a canonical Kaehler potential, some of the scalars of the ''magnetic'' theory typically have negative mass-squared, and the vector-like symmetry is broken. Since for large supersymmetry breaking the ''electric'' theory becomes ordinary QCD, the two theories are then incompatible. For small supersymmetry breaking, if duality still holds, the magnetic theory analysis implies specific patterns of chiral symmetry breaking in supersymmetric QCD with small soft masses

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May 1998; 8 p; 33. rencontres de Moriond: QCD and high energy hadronic interactions; Les Arcs (France); 21-28 Mar 1998; CONF-980357--; CONTRACT AC02-76CH03000; ALSO AVAILABLE FROM OSTI AS DE98054543; NTIS; US GOVT. PRINTING OFFICE DEP

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Wells, J.D.

Stanford Univ., Stanford Linear Accelerator Center, CA (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

Stanford Univ., Stanford Linear Accelerator Center, CA (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

AbstractAbstract

[en] In R parity conserving supersymmetric theories, the lightest superpartner (LSP) is stable. The LSPs may comprise a large fraction of the energy density of the current universe, which would lead to dramatic astrophysical consequences. In this talk, he discusses some of the main points they have learned about supersymmetric models from relic abundance considerations of the LSP

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May 1997; 7 p; 5. international conference on supersymmetries in physics; Philadelphia, PA (United States); 27-31 May 1997; CONF-9705195--; CONTRACT AC03-76SF00515; ALSO AVAILABLE FROM OSTI AS DE98059117; NTIS; US GOVT. PRINTING OFFICE DEP

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Baleanu, D.; Codoban, S.

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

AbstractAbstract

[en] Recently geometric duality was analyzed for a metric which admits Killing tensors. An interesting example arises when the manifold has Killing-Yano tensors. The symmetries of the dual metrics in the case of Taub-NUT metric are investigated. Generic and non-generic symmetries of dual Taub-NUT metric are analyzed

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1998; 10 p; 18 refs., 2 figs. Submitted to General Relativity and Gravitation

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AbstractAbstract

[en] The problem of chiral symmetry restoration at finite baryonic density and/or temperature is discussed. We first study the evolution of the quark condensate in nuclear mater and then address the question of the modification of the rho meson mass spectrum in connection with relativistic heavy ions collisions. (author)

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Laboratoire National Saturne, Centre d'Etudes de Saclay, 91 - Gif-sur-Yvette (France); 471 p; 1996; p. 316-322; 7. SATURNE workshop; JES 7 - journees d'etudes Saturne, Ramatuelle; Ramatuelle (France); 29 Jan - 2 Feb 1996; 23 refs.

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AbstractAbstract

[en] Recently a model of chaotic inflation was proposed in which the right-handed sneutrinos drive the baryogenesis. We study some of the details of the model, particularly the aspect of CP violation, and determine the number of right-handed sneutrinos required for the viability of such models

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Journal Article

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