Aug 23 – 28, 2010
Bonn
Europe/Berlin timezone

More on Dimension-4 Proton Decay Problem in F-theory

Aug 23, 2010, 2:00 PM
15m
Hörsaal I (Bonn)

Hörsaal I

Bonn

Nussallee 12

Speaker

Hirotaka Hayashi (The University of Tokyo)

Description

Recently, supersymmetric compactifications of F-theory have been considerably studied for the construction of realistic GUT models in string theory. In supersymmetric compactifications for realistic models, dimension-4 proton decay operators have to be brought under control. So-called factorized spectral surface scenario, which uses an U(1) symmetry to forbid dimension-4 proton decay operators, has been considered as one of solutions to the dimension-4 proton decay problems in F-theory. However, the factorized spectral surface scenario is not without a theoretical concern. In this talk, I will discuss whether the U(1) symmetry in such a scenario is maintained or not in global F-theory compactifications and show that it is generally broken and dimension-4 proton decay operators are likely to be generated in a simple factorized spectral surface scenario. I will also present a list of chances to save the scenario.

Summary

We revisit the dimension-4 proton decay problems in F-theory. We study the U(1) symmetry which forbids dimension-4 proton decay operators in the factorized spectral surface scenario and show that it is generally broken and dimension-4 proton decay operators are likely to be generated in such a scenario. A list of loopholes is also presented.

Primary author

Hirotaka Hayashi (The University of Tokyo)

Co-authors

Prof. Taizan Watari (IPMU) Prof. Teruhiko Kawano (The University of Tokyo) Mr Yoichi Tsuchiya (The University of Tokyo)

Presentation materials