A string theory of flavor and CP

Baur, Alexander; Nilles, Hans Peter; Trautner, Andreas; Vaudrevange, Patrick K. S.

doi:10.1016/j.nuclphysb.2019.114737

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A string theory of flavor and CP

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Trautner, Andreas
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Baur, A., Nilles, H. P., Trautner, A., & Vaudrevange, P. K. S. (2019). A string theory of flavor and CP. Nuclear Physics B, 947: UNSP 114737. doi:10.1016/j.nuclphysb.2019.114737.

Cite as: https://hdl.handle.net/21.11116/0000-0005-5072-0

Abstract

Modular transformations of string theory (including the well-known stringy dualities) play a crucial role in the discussion of discrete flavor symmetries in the Standard Model. They are at the origin of CP-transformations and provide a unification of CP with traditional flavor symmetries. Here, we present a novel, fully systematic method to reliably compute the unified flavor symmetry of the low-energy effective theory, including enhancements from the modular transformations of string theory. The unified flavor group is non-universal in moduli space and exhibits the phenomenon of "Local Flavor Unification" where different sectors of the theory can be subject to different flavor structures. (C) 2019 The Author(s). Published by Elsevier B.V.