Opin vísindi

Threshold effects in SO(10) models with one intermediate breaking scale

Threshold effects in SO(10) models with one intermediate breaking scale

Title: Threshold effects in SO(10) models with one intermediate breaking scale
Author: Meloni, Davide
Ohlsson, Tommy   orcid.org/0000-0002-3525-8349
Pernow, Marcus   orcid.org/0000-0002-6238-5511
Date: 2020-09-10
Language: English
Scope: 840
University/Institute: Háskóli Íslands
University of Iceland
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Department: Raunvísindastofnun (HÍ)
Science Institute (UI)
Series: The European Physical Journal C;80(9)
ISSN: 1434-6044
1434-6052 (eISSN)
DOI: 10.1140/epjc/s10052-020-8308-9
Subject: SO(10) models; Particle physics; Threshold effects; Atómfræði
URI: https://hdl.handle.net/20.500.11815/2208

Show full item record


Meloni, D., Ohlsson, T. & Pernow, M. Threshold effects in SO(10) models with one intermediate breaking scale. The European Physical Journal C 80, 840 (2020). https://doi.org/10.1140/epjc/s10052-020-8308-9


Despite the successes of the Standard Model of particle physics, it is known to suffer from a number of deficiencies. Several of these can be addressed within non-supersymmetric theories of grand unification based on SO(10). However, achieving gauge coupling unification in such theories is known to require additional physics below the unification scale, such as symmetry breaking in multiple steps. Many such models are disfavored due to bounds on the proton lifetime. Corrections arising from threshold effects can, however, modify these conclusions. We analyze all seven relevant breaking chains with one intermediate symmetry breaking scale, assuming the “survival hypothesis” for the scalar masses. Two are allowed by proton lifetime and two are disfavored by a failure to unify the gauge couplings. The remaining three unify at a too low scale, but can be salvaged by various amounts of threshold corrections. We parametrize this and thereby rank the models by the size of the threshold corrections required to save them.


Publisher's version (útgefin grein)


Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Files in this item

This item appears in the following Collection(s)