منابع مشابه
Standard Model bundles of the heterotic string
We show how to construct supersymmetric three-generation models with gauge group and matter content of the Standard Model in the framework of non-simplyconnected elliptically fibered Calabi-Yau manifolds Z. The elliptic fibration on a cover Calabi-Yau, where the model has 6 generations of SU(5) and the bundle is given via the spectral cover description, has a second section leading to the neede...
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It is known that the Standard Model describing all of the currently known elementary particles is based on the U(1)×SU(2)×SU(3) symmetry. In order to implement this symmetry on the ground of a non-flat space-time manifold one should introduce three special bundles. Some aspects of the mathematical theory of these bundles are studied in this paper. 1. The Dirac bundle and its basic fields. Spin ...
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We derive the Standard model gauge group together with chiral fermion generations from the heterotic string by turning on a Wilson line on a non-simply connected Calabi-Yau threefold with an SU(5) gauge group. For this we construct stable Z2-invariant SU(4) × U(1) bundles on an elliptically fibered cover CalabiYau threefold of special fibration type (the B-fibration). The construction makes use...
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A noncommutative version of the usual electro-weak theory is constructed. We discuss how to overcome the two major problems: 1) although we can have noncommuta-tive U (n) (which we denote by U ⋆ (n)) gauge theory we cannot have noncommutative SU (n) and 2) the charges in noncommutative QED are quantized to just 0, ±1. We show how the problem with charge quantization, as well as with the gauge g...
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Certificateless public key cryptography (CL-PKC) is a useful method in order to solve the problems of traditional public key infrastructure (i.e., large amount of computation, storage and communication costs for managing certificates) and ID-based public key cryptography (i.e., key escrow problem), simultaneously. A signcryption scheme is an important primitive in cryptographic protocols which ...
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ژورنال
عنوان ژورنال: Advances in Theoretical and Mathematical Physics
سال: 2001
ISSN: 1095-0761,1095-0753
DOI: 10.4310/atmp.2001.v5.n3.a5