کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1843563 | 1645193 | 2006 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Standard model compactifications of IIA Z3ÃZ3 orientifolds from intersecting D6-branes
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
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چکیده انگلیسی
We discuss the construction of chiral four-dimensional T6/(Z3ÃZ3) orientifold compactifications of IIA theory, using D6-branes intersecting at angles and not aligned with the orientifold O6 planes. Cancellation of mixed U(1) anomalies requires the presence of a generalized Green-Schwarz mechanism mediated by RR partners of closed string untwisted moduli. In this respect we describe the appearance of three quark and lepton family SU(3)CÃSU(2)LÃU(1)Y non-supersymmetric orientifold models with only the massless spectrum of the SM at low energy that can have either no exotics present and three families of νR's (Aâ²-model class) or the massless fermion spectrum of the N=1 SM with a small number of massive non-chiral colour exotics and in one case with extra families of νR's (Bâ²-model class). Moreover we discuss the construction of SU(5), flipped SU(5) and Pati-Salam SU(4)cÃSU(2)LÃSU(2)R GUTS-the latter also derived from adjoint breaking-with only the SM at low energy. Some phenomenological features of these models are also briefly discussed. All models are constructed with the Weinberg angle to be 3/8 at the string scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 732, Issues 1â2, 2 January 2006, Pages 341-365
Journal: Nuclear Physics B - Volume 732, Issues 1â2, 2 January 2006, Pages 341-365
نویسندگان
Christos Kokorelis,