The University of Southampton
University of Southampton Institutional Repository

Z′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale

Z′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale
Z′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale
We study a class of non-exotic minimal U(1)′ extensions of the Standard Model, which includes all scenarios that are anomaly-free with the ordinary fermion content augmented by one Right-Handed neutrino per generation, wherein the new Abelian gauge group is spontaneously broken by the non-zero Vacuum Expectation Value of an additional Higgs singlet field, in turn providing mass to a Z′ state. By adopting the B − L example, whose results can be recast into those pertaining to the whole aforementioned class, and allowing for both scalar and gauge mixing, we first extract the surviving parameter space in presence of up-to-date theoretical and experimental constraints. Over the corresponding parameter configurations, we then delineate the high energy behaviour of such constructs in terms of their stability and perturbativity. Finally, we highlight key production and decay channels of the new states entering the spectra of this class of models, i.e., heavy neutrinos, a second Higgs state and the Z′, which are amenable to experimental investigation at the Large Hadron Collider. We therefore set the stage to establish a direct link between measurements obtainable at the Electro-Weak scale and the dynamics of the underlying model up to those where a Grand Unification Theory embedding a U(1)′ can be realised.
Beyond Standard Model , GUT , Higgs Physics , Neutrino Physics
1029-8479
Accomando, Elena
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
Coriano, Claudio
736717df-e9f3-415a-bd78-9c2c7b5b4f2d
Delle Rose, Luigi
19c81ce1-e14b-4e4c-b72d-0d74cbb331db
Fiaschi, Juri
a417f04d-05ec-4bff-bdee-ba20ac560fa7
Marzo, Carlo
e50a7231-60d0-4811-8e20-486747409cc4
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Accomando, Elena
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
Coriano, Claudio
736717df-e9f3-415a-bd78-9c2c7b5b4f2d
Delle Rose, Luigi
19c81ce1-e14b-4e4c-b72d-0d74cbb331db
Fiaschi, Juri
a417f04d-05ec-4bff-bdee-ba20ac560fa7
Marzo, Carlo
e50a7231-60d0-4811-8e20-486747409cc4
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614

Accomando, Elena, Coriano, Claudio, Delle Rose, Luigi, Fiaschi, Juri, Marzo, Carlo and Moretti, Stefano (2016) Z′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale. Journal of High Energy Physics, 2016 (7), [86]. (doi:10.1007/JHEP07(2016)086).

Record type: Article

Abstract

We study a class of non-exotic minimal U(1)′ extensions of the Standard Model, which includes all scenarios that are anomaly-free with the ordinary fermion content augmented by one Right-Handed neutrino per generation, wherein the new Abelian gauge group is spontaneously broken by the non-zero Vacuum Expectation Value of an additional Higgs singlet field, in turn providing mass to a Z′ state. By adopting the B − L example, whose results can be recast into those pertaining to the whole aforementioned class, and allowing for both scalar and gauge mixing, we first extract the surviving parameter space in presence of up-to-date theoretical and experimental constraints. Over the corresponding parameter configurations, we then delineate the high energy behaviour of such constructs in terms of their stability and perturbativity. Finally, we highlight key production and decay channels of the new states entering the spectra of this class of models, i.e., heavy neutrinos, a second Higgs state and the Z′, which are amenable to experimental investigation at the Large Hadron Collider. We therefore set the stage to establish a direct link between measurements obtainable at the Electro-Weak scale and the dynamics of the underlying model up to those where a Grand Unification Theory embedding a U(1)′ can be realised.

Other
pdf
Download (7MB)

More information

Accepted/In Press date: 10 May 2016
e-pub ahead of print date: 18 July 2016
Published date: 18 July 2016
Additional Information: 32 pages, 59 figures, journal version
Keywords: Beyond Standard Model , GUT , Higgs Physics , Neutrino Physics
Organisations: Mathematical Sciences, Physics & Astronomy, Theory Group

Identifiers

Local EPrints ID: 409624
URI: http://eprints.soton.ac.uk/id/eprint/409624
ISSN: 1029-8479
PURE UUID: b8438332-5657-49b3-9982-f6dfd60b1263

Catalogue record

Date deposited: 01 Jun 2017 04:03
Last modified: 16 Dec 2019 18:59

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×