On Stringy Origin of Minimal Flavor Violation

Tatsuo Kobayashi; Hajime Otsuka

doi:10.1140/epjc/s10052-022-09986-4

On Stringy Origin of Minimal Flavor Violation

High Energy Physics - Phenomenology 2022-01-12 v2 High Energy Physics - Theory

Authors: Tatsuo Kobayashi , Hajime Otsuka

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Abstract

We study the minimal flavor violation in the context of string effective field theory. Stringy selection rules indicate that $n$ -point couplings among fermionic zero-modes and lightest scalar modes in the string effective action are given by a product of Yukawa couplings which are regarded as spurion fields of stringy and geometrical symmetries. Hence, Yukawa couplings determine the dynamics of flavor and CP violations. This observation strongly supports the hypothesis of minimal flavor violation in the Standard Model effective field theory.

Keywords

minimal flavor violation string effective field theory yukawa couplings spurion fields standard model effective field theory cp violation

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@article{arxiv.2108.02700,
  title  = {On Stringy Origin of Minimal Flavor Violation},
  author = {Tatsuo Kobayashi and Hajime Otsuka},
  journal= {arXiv preprint arXiv:2108.02700},
  year   = {2022}
}

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6 pages, v2: published version

On Stringy Origin of Minimal Flavor Violation

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