Natural Standard Model Alignment in the Two Higgs Doublet Model

2015/03/31 by P. S. Bhupal Dev, Apostolos Pilaftsis · 16 citations
Computer Science · Engineering · Physics and Astronomy · #Biology #Black Holes and Theoretical Physics #Computational Physics and Python Applications #Context (archaeology) #Decoupling (probability) #Engineering #Gauge (firearms) #Higgs boson #Higgs field #Higgs mechanism #Higgs sector #Large Hadron Collider #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Standard Model (mathematical formulation) #Symmetry breaking #Two-Higgs-doublet model #hep-ph

paper · pdf · doi:10.1088/1742-6596/631/1/012030

published in Journal of Physics Conference Series 631, 012030 (IOP Publishing) · 15 pages, 1 table, 8 figures; Contribution to the Proceedings of DISCRETE 2014, London

arxiv created 2015/03/31 · openalex publication_date 2015/07/30 · arxiv updated 2015/08/03 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/06

Abstract

In order to satisfy the current LHC Higgs data, which require the couplings of the observed 125 GeV Higgs boson to be close to the Standard Model (SM) expectations, any extended Higgs sector must lead to the so-called SM alignment limit . In the context of the Two Higgs Doublet Model (2HDM), this alignment is often associated with either decoupling of the heavy Higgs sector or accidental cancellations in the 2HDM potential. We present a symmetry justification for 'natural' alignment without decoupling or fine-tuning. We show that in Type II 2HDM, there exist only three different symmetry realizations which could lead to a natural alignment. We discuss some phenomenological implications of the Maximally-Symmetric 2HDM based on SO(5) symmetry group and analyze new collider signals for the heavy Higgs sector, involving third-generation quarks, which can be a useful observational tool during the Run-II phase of the LHC.

Citations

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• On anomalous electroweak baryon-number non-conservation in the early universe
• Lie Algebras in Particle Physics: From Isospin to Unified Theories
• Big-Bang Nucleosynthesis

Cited by

• Looking for New Naturally Aligned Higgs Doublets at the LHC
• Natural Alignment in the Two Higgs Doublet Model