12,387 research outputs found

    The spectral dimension of non-generic branched polymers

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    We show that the spectral dimension on non-generic branched polymers with positive susceptibility exponent is given by ds=2/(1+γ)d_s=2/(1+\gamma). For those models with γ<0\gamma<0 we find that ds=2d_s=2.Comment: LATTICE98(surfaces

    The Spectral Dimension of Non-generic Branched Polymer Ensembles

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    We show that the spectral dimension on non-generic branched polymer models with susceptibility exponent γ\gamma is given by 2/(1+γ)2/(1+\gamma). For those models with negative γ\gamma we find that the spectral dimension is 2.Comment: 10 pages plain LateX2e, 1 eps figures included using eps

    Three-State Complex Valued Spins Coupled to Binary Branched Polymers in Two-Dimensional Quantum Gravity

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    A model of complex spins (corresponding to a non-minimal model in the language of CFT) coupled to the binary branched polymer sector of quantum gravity is considered. We show that this leads to new behaviour.Comment: 3 pages, Latex2e, 2 eps figures, uses espcrc2 and epsf. Contribution to LATTICE 97, to appear in the Proceeding

    The MSSM from Scherk-Schwarz Supersymmetry Breaking

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    We present a five-dimensional model compactified on an interval where supersymmetry is broken by the Scherk-Schwarz mechanism. The gauge sector propagates in the bulk, two Higgs hypermultiplets are quasilocalized, and quark and lepton multiplets localized, in one of the boundaries. The effective four-dimensional theory is the MSSM with very heavy gauginos, heavy squarks and light sleptons and Higgsinos. The soft tree-level squared masses of the Higgs sector can be negative and they can (partially) cancel the positive one-loop contributions from the gauge sector. Electroweak symmetry breaking can then comfortably be triggered by two-loop radiative corrections from the top-stop sector. The fine tuning required to obtain the electroweak scale is found to be much smaller than in the MSSM, with essentially no fine-tuning for few TeV gaugino masses. All bounds from direct Higgs searches at LEP and from electroweak precision observables can be satisfied. The lightest supersymmetric particle is a (Higgsino-like) neutralino that can accomodate the abundance of Dark Matter consistently with recent WMAP observations.Comment: 23 pages, 3 figure

    Influence of labyrinth orientation relative to gravity on responses elicited by stimulation of the horizontal semicircular canals

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    Gravity labyrinth orientation influence on responses from stimulation of horizontal semicircular canal
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