LHC-scale left-right symmetry and unification
Abstract
We construct a comprehensive list of non-supersymmetric standard model extensions with a low-scale LR-symmetric intermediate stage that may be obtained as simple low-energy effective theories within a class of renormalizable GUTs. Unlike the traditional "minimal" LR models many of our example settings support a perfect gauge coupling unification even if the LR scale is in the LHC domain at a price of only (a few copies of) one or two types of extra fields pulled down to the TeV-scale ballpark. We discuss the main aspects of a potentially realistic model building conforming the basic constraints from the quark and lepton sector flavour structure, proton decay limits, etc. We pay a special attention to the theoretical uncertainties related to the limited information about the underlying unified framework in the bottom-up approach, in particular, to their role in the possible extraction of the LR-breaking scale. We observe a general tendency for the models without new coloured states in the TeV domain to be on the verge of incompatibility with the proton stability constraints.
Cite
@article{arxiv.1311.3228,
title = {LHC-scale left-right symmetry and unification},
author = {Carolina Arbeláez and Martin Hirsch and Michal Malinský and Jorge C. Romão},
journal= {arXiv preprint arXiv:1311.3228},
year = {2014}
}