کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1843214 1645177 2006 54 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Proton decay, Yukawa couplings and underlying gauge symmetry in string theory
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Proton decay, Yukawa couplings and underlying gauge symmetry in string theory
چکیده انگلیسی

In string theory, massless particles often originate from a symmetry breaking of a large gauge symmetry G to its subgroup H  . The absence of dimension-4 proton decay in supersymmetric theories suggests that (D¯,L) are different from H¯(5¯) in their origins. In this article, we consider a possibility that they come from different irreducible components in g/hg/h. Requiring that all the Yukawa coupling constants of quarks and leptons be generated from the super-Yang–Mills interactions of G  , we found in the context of Georgi–Glashow H=SU(5)H=SU(5) unification that the minimal choice of G   is E7E7 and E8E8 is the only alternative. This idea is systematically implemented in heterotic String, M theory and F theory, confirming the absence of dimension 4 proton decay operators. Not only H=SU(5)H=SU(5) but also G constrain operators of effective field theories, providing non-trivial information.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 747, Issues 1–2, 17 July 2006, Pages 212–265
نویسندگان
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