Viable quark-lepton Yukawa ratios and nucleon decay predictions in SU(5) GUTs with type-II seesaw

被引：11

作者：

Antusch, Stefan ^{[1
]}

Hinze, Kevin ^{[1
]}

Saad, Shaikh ^{[1
]}

机构：

[1] Univ Basel, Dept Phys, Klingelbergstr 82, CH-4056 Basel, Switzerland

来源：

NUCLEAR PHYSICS B | 2023年 / 986卷

关键词：

NEUTRINO MASS; RENORMALIZATION-GROUP; FERMION MASSES; MODEL;

D O I：

10.1016/j.nuclphysb.2022.116049

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We investigate the viability of predictive schemes for quark-lepton Yukawa ratios and nucleon decay in non-supersymmetric SU(5) Grand Unified Theories (GUTs) where neutrino masses are generated by a type II seesaw mechanism. The scalar sector of the considered scenario contains 5-, 24-and 45-dimensional representations plus a 15-dimensional representation for realizing the type II seesaw. Predictions for the ratios of the quark and lepton Yukawa couplings emerge when the relevant entries of the Yukawa matrices are generated from single joint GUT operators (i.e. under the condition of single operator dominance). Focusing on the 2nd and 3rd family and hierarchical Yukawa matrices, we show that only two sets of predictions, y ⠂ yb= 3 2 , y mu ys= 9 2and y ⠂ yb= 2, y mu ys= 6 are viable. To further investigate both options, we extend the minimal scenarios to two "toy models", including the 1st family of charged fermions, and calculate the models' predictions, e.g. for the nucleon decay rates and for the masses of the light relics that are potentially within reach of colliders.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.

引用

页数：23

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