1,961 research outputs found

    Consistency Conditions for AdS/CFT Embeddings

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    The group embeddings used in orbifolding the AdS/CFT correspondence to arrive at quiver gauge field theories are studied for both supersymmetric and non-supersymmetric cases. For an orbifold AdS5×S5/ΓAdS_5 \times S^5/\Gamma the conditions for embeddings of the finite group Γ\Gamma in the SU(4)O(6)SU(4) \sim O(6) isotropy of S5S^5 are stated in the form of consistency rules, both for Abelian and Non-Abelian Γ\Gamma.Comment: 10 pages LaTe

    An Explicit SU(12) Family and Flavor Unification Model

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    An explicit SUSY SU(12) unification model with three light chiral families is presented which avoids any external flavor symmetries. The hierarchy of quark and lepton masses and mixings is explained by higher dimensional Yukawa interactions involving Higgs bosons containing SU(5) singlet fields with VEVs appearing at or below the SUSY GUT scale of 2 \times 10^{16} GeV, approximately 50 times smaller than the SU(12) unification scale. The model has been found to be in good agreement with the observed quark and lepton masses and mixings, with nearly all prefactors of O(1) in the four Dirac and one Majorana fermion mass matrices.Comment: 7 pages, in proceedings of the CETUP*2012 Workshop, Lead, SD, 10 July - 1 August 201

    Extra dimensions and Strong Neutrino-Nucleon interactions above 101910^{19} eV : Breaking the GZK Barrier

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    Cosmic ray events above 102010^{20} eV are on the verge of confronting fundamental particle physics. The neutrino is the only candidate primary among established particles capable of crossing 100 Mpc intergalactic distances unimpeded. The magnitude of νN\nu N cross sections indicated by events, plus consistency with the Standard Model at low-energy, point to new physics of massive spin-2 exchange. In models based on extra dimensions, we find that the νN\nu N cross section rises to typical hadronic values of between 1 and 100 mb at energies above 102010^{20} eV. Our calculations take into account constraints of unitarity. We conclude that air-showers observed with energies above 101910^{19} eV are consistent with neutrino primaries and extra-dimension models. An {\it upper bound} of 1-10 TeV on the mass scale at which graviton exchange becomes strong in current Kaluza-Klein models follows.Comment: 14 pages, 2 figures, minor change

    Constraints on Deflation from the Equation of State of Dark Energy

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    In cyclic cosmology based on phantom dark energy the requirement that our universe satisfy a CBE-condition ({\it Comes Back Empty}) imposes a lower bound on the number NcpN_{\rm cp} of causal patches which separate just prior to turnaround. This bound depends on the dark energy equation of state w=p/ρ=1ϕw = p/\rho = -1 - \phi with ϕ>0\phi > 0. More accurate measurement of ϕ\phi will constrain NcpN_{\rm cp}. The critical density ρc\rho_c in the model has a lower bound ρc(109GeV)4\rho_c \ge (10^9 {\rm GeV})^4 or ρc(1018GeV)4\rho_c \ge (10^{18} {\rm GeV})^4 when the smallest bound state has size 101510^{-15}m, or 103510^{-35}m, respectively.Comment: 23 pages, 3 figures, typos fixe

    Classification of SUSY and non-SUSY Chiral Models from Abelian Orbifolds AdS/CFT

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    We classify compactifications of the type IIB superstring on AdS_{5} x S^{5}/\Gamma, where \Gamma is an abelian group of order n<= 12. Appropriate embedding of \Gamma in the isometry of S^5 yields both SUSY and non-SUSY chiral models that can contain the minimal SUSY standard model or the standard model. New non-SUSY three family models with \Gamma=Z_8 are introduced, which lead to the right Weinberg angle for TeV trinification.Comment: 12 pages, no figur

    A Classification and Analysis of Higgs-flavor Models

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    A classification is given of Higgs-flavor models. In these models, there are several Higgs doublets in an irreducible multiplet R_{Phi} of a non-abelian symmetry G_{Phi}, under which the quarks and leptons do not transform (thus giving minimal flavor-changing for the fermions). It is found that different G_{Phi} and R_{Phi} lead to very distinctive spectra of the extra Higgs doublets, including different numbers of "sequential Higgs" and of "inert Higgs" that could play the role of dark matter, different mass relations, and different patterns of SU(2)_L-breaking splittings within the Higgs doublets.Comment: 35 page

    Representing Structural Information of Helical Charge Distributions in Cylindrical Coordinates

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    Structural information in the local electric field produced by helical charge distributions, such as dissolved DNA, is revealed in a straightforward manner employing cylindrical coordinates. Comparison of structure factors derived in terms of cylindrical and helical coordinates is made. A simple coordinate transformation serves to relate the Green function in cylindrical and helical coordinates. We also compare the electric field on the central axis of a single helix as calculated in both systems.Comment: 11 pages in plain LaTex, no figures. Accepted for publication in PRE March, 199

    Visualizations for an Explainable Planning Agent

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    In this paper, we report on the visualization capabilities of an Explainable AI Planning (XAIP) agent that can support human in the loop decision making. Imposing transparency and explainability requirements on such agents is especially important in order to establish trust and common ground with the end-to-end automated planning system. Visualizing the agent's internal decision-making processes is a crucial step towards achieving this. This may include externalizing the "brain" of the agent -- starting from its sensory inputs, to progressively higher order decisions made by it in order to drive its planning components. We also show how the planner can bootstrap on the latest techniques in explainable planning to cast plan visualization as a plan explanation problem, and thus provide concise model-based visualization of its plans. We demonstrate these functionalities in the context of the automated planning components of a smart assistant in an instrumented meeting space.Comment: PREVIOUSLY Mr. Jones -- Towards a Proactive Smart Room Orchestrator (appeared in AAAI 2017 Fall Symposium on Human-Agent Groups
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