منابع مشابه
Global F-theory GUTs
We construct global F-theory GUT models on del Pezzo surfaces in compact Calabi-Yau fourfolds realized as complete intersections of two hypersurface constraints. The intersections of the GUT brane and the flavour branes as well as the gauge flux are described by the spectral cover construction. We consider a split S[U(4)×U(1)X ] spectral cover, which allows for the phenomenologically relevant Y...
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We study the F-theory uplift of Type IIB orientifold models on compact Calabi-Yau threefolds containing divisors which are del Pezzo surfaces. We consider two examples defined via del Pezzo transitions of the quintic. The first model has an orientifold projection leading to two disjoint O7-planes and the second involution acts via an exchange of two del Pezzo surfaces. The two uplifted fourfold...
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We construct the 12-dimensional exceptional field theory associated to the group SL(2)× R. Demanding the closure of the algebra of local symmetries leads to a constraint, known as the section condition, that must be imposed on all fields. This constraint has two inequivalent solutions, one giving rise to 11-dimensional supergravity and the other leading to F-theory. Thus SL(2) × R exceptional f...
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The massless spectrum of an orientifold of the IIB string theory is computed and shown to be identical to F theory on the Calabi-Yau threefold with h11 = 51 and h21 = 3. Target space duality is also considered in this model.
متن کاملExceptional Subgroups of Sl(2, F )
For A, B ∈ SL(2, C), R. C. Churchill gave simple conditions in terms of tr(A), tr(B), and tr(AB) to determine whether the image of the subgroup 〈A, B〉 in PSL(2, C) is isomorphic to A4, S4, or A5. We prove that the same conditions work for SL(2, F ) for any field F , except when the image is A5 and F has characteristic 3, 11, 19, or 29.
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2011
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.83.026006