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

Author(s)

Camargo, Daniel A. ^[1] ; Delle Rose, Luigi ^{[2, 3]} ; Moretti, Stefano ^[4] ; Queiroz, Farinaldo S. ^[1]

Affiliation

^[1] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ, BR-59078970 Natal, RN - Brazil

^[2] Univ Firenze, INFN, Sez Firenze, Via G Sansone 1, I-50019 Sesto Fiorentino - Italy

^[3] Univ Firenze, Dipartimento Fis Astron, Via G Sansone 1, I-50019 Sesto Fiorentino - Italy

^[4] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants - England

• Document type: Journal article
• Source: Physics Letters B; v. 793, p. 150-160, JUN 10 2019.
• Web of Science Citations: 3

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). (C) 2019 The Author(s). Published by Elsevier B.V. (AU)

• FAPESP's process: 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
• Grantee: Nathan Jacob Berkovits
• Support Opportunities: Special Projects