dc.contributor |
Háskóli Íslands |
dc.contributor |
University of Iceland |
dc.contributor.author |
Meloni, Davide |
dc.contributor.author |
Ohlsson, Tommy |
dc.contributor.author |
Pernow, Marcus |
dc.date.accessioned |
2020-11-16T11:38:25Z |
dc.date.available |
2020-11-16T11:38:25Z |
dc.date.issued |
2020-09-10 |
dc.identifier.citation |
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 |
dc.identifier.issn |
1434-6044 |
dc.identifier.issn |
1434-6052 (eISSN) |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/2208 |
dc.description |
Publisher's version (útgefin grein) |
dc.description.abstract |
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. |
dc.description.sponsorship |
The authors wish to thank Sofiane M. Boucenna for collaboration in early stages of this project and Erik Sönnerlind for pointing out errors and clarifying issues with numerics in a draft of this manuscript. T.O. acknowledges support by the Swedish Research Council (Vetenskapsrådet) through contract No. 2017-03934 and the KTH Royal Institute of Technology for a sabbatical period at the University of Iceland. M.P. thanks “Stiftelsen Olle Engkvist Byggmästare” and “Roland Gustafssons Stiftelse för teoretisk fysik” for financial support. Numerical computations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at PDC Center for High Performance Computing (PDC-HPC) at KTH Royal Institute of Technology in Stockholm, Sweden under project numbers SNIC 2018/3-559 and SNIC 2020/5-122. |
dc.format.extent |
840 |
dc.language.iso |
en |
dc.publisher |
Springer Science and Business Media LLC |
dc.relation.ispartofseries |
The European Physical Journal C;80(9) |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
SO(10) models |
dc.subject |
Particle physics |
dc.subject |
Threshold effects |
dc.subject |
Atómfræði |
dc.title |
Threshold effects in SO(10) models with one intermediate breaking scale |
dc.type |
info:eu-repo/semantics/article |
dcterms.license |
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/. |
dc.description.version |
Peer Reviewed |
dc.identifier.journal |
The European Physical Journal C |
dc.identifier.doi |
10.1140/epjc/s10052-020-8308-9 |
dc.relation.url |
https://link.springer.com/article/10.1140/epjc/s10052-020-8308-9 |
dc.contributor.department |
Raunvísindastofnun (HÍ) |
dc.contributor.department |
Science Institute (UI) |
dc.contributor.school |
Verkfræði- og náttúruvísindasvið (HÍ) |
dc.contributor.school |
School of Engineering and Natural Sciences (UI) |