M-theory model-building and proton stability
نویسندگان
چکیده
منابع مشابه
M-Theory Model-Building and Proton Stability
We study the problem of baryon stability in M theory, starting from realistic four-dimensional string models constructed using the free-fermion formulation of the weakly-coupled heterotic string. Suitable variants of these models manifest an enhanced custodial gauge symmetry that forbids to all orders the appearance of dangerous dimension-five baryon-decay operators. We exhibit the underlying g...
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The problem of the stabilization of moduli is discussed within the context of compactified strongly coupled heterotic string theory. It is shown that all geometric, vector bundle and five-brane moduli are completely fixed, within a phenomenologically acceptable range, by non-perturbative physics. This result requires, in addition to the full space of moduli, non-vanishing Neveu-Schwarz flux, ga...
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We show how our former approach to model building can be extended into a uniied approach to model building and model checking, able to guide the discovery of theories in which a model can be built for a given formula. In contrast with other enumeration approaches used to decide some classes of rst-order formulae, our approach automatically discovers (in the best case) or strongly guides (in the...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(97)01294-x