Road map through the desert: unification with vector-like fermions

A bstract In light of null results from New Physics searches at the LHC, we look at unification of the gauge couplings as a model-building principle. As a first step, we consider extensions of the Standard Model with vector-like fermions. We present a comprehensive list of spectra that feature fermi...

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Bibliographic Details
Published in:The journal of high energy physics 2019-12, Vol.2019 (12), p.1-26, Article 94
Main Authors: Kowalska, Kamila, Kumar, Dinesh
Format: Article
Language:English
Subjects:
Beyond Standard Model
Charged particles
Classical and Quantum Gravitation
Elementary Particles
Fermions
GUT
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
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Summary:A bstract In light of null results from New Physics searches at the LHC, we look at unification of the gauge couplings as a model-building principle. As a first step, we consider extensions of the Standard Model with vector-like fermions. We present a comprehensive list of spectra that feature fermions in two distinct SU(3) C × SU(2) L× U(1) Y representations, in which precise gauge coupling unification is achieved. We derive upper and lower limits on vector-like masses from proton decay measurements, running of the strong gauge coupling, heavy stable charged particle searches, and electroweak precision tests. We demonstrate that due to a particular hierarchy among the mass parameters required by the unification condition, complementarity of various experimental strategies allows us to probe many of the successful scenarios up to at least 10 TeV.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP12(2019)094