منابع مشابه
M-theory and Hypercharge
We discuss the possibility that the electro-weak and strong interactions arise as the low energy effective description of branes in M-theory. As a step towards constructing such a model we show how one can naturally obtain SU(N 1) × SU(N 2) × U(1) gauge theories from branes, including matter in the bi-fundamental representation of SU(N 1) × SU(N 2) which are fractionally charged under U(1).
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If in addition to the standard model fields, a new pseudoscalar field that couples to hypercharge topological number density, the hypercharge axion, exists, it can be produced in colliders in association with photons or Z bosons, and detected by looking for its decay into photons or Z’s. For a range of masses below a TeV and coupling above a fraction of 1/TeV, existing data from LEP II and the ...
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This paper discusses some details of Vachaspati’s particle-monopole correspondence and their relation to a dual standard model. We show that contained within his correspondence are several sub-correspondences relating to electroweak, strong and hypercharge interactions. Associated with each of these we propose an analogous dual model; the use of these being to examine in isolation specific feat...
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We explore the extent to which string theories with higher-level gauge symmetries and non-standard hypercharge normalizations can reconcile the discrepancy between the string unification scale and the GUT scale extrapolated from the Minimal Supersymmetric Standard Model (MSSM). We determine the phenomenologically allowed regions of (kY , k2, k3) parameter space, and investigate the proposal tha...
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In analogy to the harmonic analysis for the Poincaré group with its irreducible representations characterizing free particles, the harmonic analysis for a nonlinear spacetime model as homogeneous space of the extended Lorentz group GL( I C) is given. What the Dirac energy-momentum measures are for free particles, are multipole measures in the analysis of nonlinear spacetime they are related to ...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2007
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2007/12/001