Local discrete symmetries from superstring derived models
نویسندگان
چکیده
منابع مشابه
Local Discrete Symmetries From Superstring Derived Models
Discrete and global symmetries play an essential role in many extensions of the Standard Model, for example, to preserve the proton lifetime, to prevent flavor changing neutral currents, etc. An important question is how can such symmetries survive in a theory of quantum gravity, like superstring theory. In a specific string model I illustrate how local discrete symmetries may arise in string m...
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It was recently suggested that the reported anomalies in Rb and R, can be interpreted as the effect of a heavy vector boson that couples to quarks and is universally decoupled from leptons. We examine how an extra gauge boson with this property can arise from supersting derived models. In a specific three generation model we show that the U( ~)B__L symmetry combines with the horizontal flavor s...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(97)00198-6