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Collider bounds on 2-Higgs doublet models with U(1) X gauge symmetries

Collider bounds on 2-Higgs doublet models with U(1) X gauge symmetries
Collider bounds on 2-Higgs doublet models with U(1) X gauge symmetries

2-Higgs Doublet Models (2HDMs) typically need to invoke an ad-hoc discrete symmetry to avoid severe flavor bounds and in addition feature massless neutrinos, thus falling short of naturally complying with existing data. However, when augmented by an Abelian gauge symmetry naturally incorporating neutrino masses via a type-I seesaw mechanism while at the same time escaping flavor changing interactions, such enlarged 2HDMs become very attractive phenomenologically. In such frameworks, the distinctive element is the Z gauge boson generated by the spontaneous breaking of the Abelian group U(1) X . In this work, we derive updated collider bounds on it. Several theoretical setups are possible, each with different and sometimes suppressed couplings to quarks and leptons. Thus, complementary data from dijet and dilepton resonance searches need to be considered to fully probe these objects. We employ the corresponding datasets as obtained at the Large Hadron Collider (LHC) at the 13 TeV CMs energy for L=12, 36 and 300 fb −1 of luminosity. Moreover, we present the potential sensitivity to such Z s of the High Luminosity LHC (HL-LHC) and High Energy LHC (HE-LHC).

0370-2693
150-160
Camargo, Daniel A.
6ac5d7a4-7554-4ea2-b168-7eba1c616c6d
Delle Rose, Luigi
19c81ce1-e14b-4e4c-b72d-0d74cbb331db
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Queiroz, Farinaldo S.
6dab3e35-08bc-41fb-9333-6d3322829ca4
Camargo, Daniel A.
6ac5d7a4-7554-4ea2-b168-7eba1c616c6d
Delle Rose, Luigi
19c81ce1-e14b-4e4c-b72d-0d74cbb331db
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Queiroz, Farinaldo S.
6dab3e35-08bc-41fb-9333-6d3322829ca4

Camargo, Daniel A., Delle Rose, Luigi, Moretti, Stefano and Queiroz, Farinaldo S. (2019) Collider bounds on 2-Higgs doublet models with U(1) X gauge symmetries. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 793, 150-160. (doi:10.1016/j.physletb.2019.04.048).

Record type: Article

Abstract

2-Higgs Doublet Models (2HDMs) typically need to invoke an ad-hoc discrete symmetry to avoid severe flavor bounds and in addition feature massless neutrinos, thus falling short of naturally complying with existing data. However, when augmented by an Abelian gauge symmetry naturally incorporating neutrino masses via a type-I seesaw mechanism while at the same time escaping flavor changing interactions, such enlarged 2HDMs become very attractive phenomenologically. In such frameworks, the distinctive element is the Z gauge boson generated by the spontaneous breaking of the Abelian group U(1) X . In this work, we derive updated collider bounds on it. Several theoretical setups are possible, each with different and sometimes suppressed couplings to quarks and leptons. Thus, complementary data from dijet and dilepton resonance searches need to be considered to fully probe these objects. We employ the corresponding datasets as obtained at the Large Hadron Collider (LHC) at the 13 TeV CMs energy for L=12, 36 and 300 fb −1 of luminosity. Moreover, we present the potential sensitivity to such Z s of the High Luminosity LHC (HL-LHC) and High Energy LHC (HE-LHC).

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Accepted/In Press date: 17 April 2019
e-pub ahead of print date: 23 April 2019
Published date: 10 June 2019

Identifiers

Local EPrints ID: 430724
URI: http://eprints.soton.ac.uk/id/eprint/430724
ISSN: 0370-2693
PURE UUID: fe94b5ae-dfe8-41a9-b606-df161b144889

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Date deposited: 09 May 2019 16:30
Last modified: 25 Nov 2021 19:49

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Contributors

Author: Daniel A. Camargo
Author: Luigi Delle Rose
Author: Stefano Moretti
Author: Farinaldo S. Queiroz

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