Unification without supersymmetry:: Neutrino mass, proton decay and light leptoquarks

被引：130

作者：

Dorsner, I

Pérez, PF

机构：

[1] Abdus Salam Int Ctr Theoret Phys, I-31014 Trieste, Italy

[2] Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, Chile

来源：

NUCLEAR PHYSICS B | 2005年 / 723卷 / 1-2期

关键词：

D O I：

10.1016/j.nuclphysb.2005.06.016

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 predictions of a minimal realistic non-supersymmetric SU(5) grand unified theory. To accomplish unification and generate neutrino mass we introduce one extra Higgs representation - a 15 of SU(5)- to the particle content of the minimal Georgi-Glashow scenario. Generic prediction of this setup is a set of rather light scalar leptoquarks. In the case of the most natural implementation of the type 11 see-saw mechanism their mass is in the phenomenologically interesting region (O(10(2)-10(3)) GeV). As such, our scenario has a potential to be tested at the next generation of collider experiments, particularly at the Large Hadron Collider (LHC) at CERN. The presence of the 15 generates additional contributions to proton decay which, for light scalar leptoquarks, can be more important than the usual gauge d = 6 ones. We exhaustively study both and show that the scenario is not excluded by current experimental bounds on nucleon lifetimes. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：53 / 76

页数：24

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