F-theory uplifts and GUTs

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Published 9 September 2009 • Published under licence by IOP Publishing Ltd
, , Citation Ralph Blumenhagen et al JHEP09(2009)053 DOI 10.1088/1126-6708/2009/09/053

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Author affiliations

1 Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany

2 Bethe Center for Theoretical Physics and Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn, Germany

3 SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA 94025, U.S.A.

Dates

  1. Received 27 July 2009
  2. Accepted 1 September 2009
  3. Published

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1126-6708/2009/09/053

Abstract

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 fourfolds are generically singular with minimal gauge enhancements over a divisor and, respectively, a curve in the non-Fano base. We study possible further degenerations of the elliptic fiber leading to F-theory GUT models based on subgroups of E8.

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10.1088/1126-6708/2009/09/053