The Higgs boson -- its implications and prospects for future discoveries

Abstract

The Higgs boson, a fundamental scalar, was discovered at CERN in 2012 with mass 125 GeV, a mass that turned out to be a remarkable choice of Nature. In the Standard Model of particle physics, the Higgs boson is closely linked to the mechanism that gives mass to the W and Z gauge bosons that mediate the weak interactions and to the charged fermions. Following discovery of the Higgs boson, present measurements at the Large Hadron Collider are focused on testing the Higgs boson's couplings to other elementary particles, precision measurements of the Higgs boson's properties and initial investigation of the Higgs boson's self-interaction and shape of the Higgs potential. With the Higgs boson mass of 125 GeV the vacuum sits very close to the border of stable and metastable, which may be a hint to deeper physics beyond the Standard Model. The Higgs potential also plays an important role in ideas about the cosmological constant or dark energy that drives the accelerating expansion of the Universe, the mysterious dark matter that comprises about 80% of the matter component in the Universe, as well as a possible phase transition in the early Universe that might be responsible for baryogenesis. Detailed study of the Higgs boson is at the centre of the recent European Strategy for Particle Physics update. Here we review the present status of this physics and discuss the new insights expected from present and future experiments.

Preprint of article submitted to Nature Reviews Physics, 25 pages, 8 figures

References in corpus (29)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Dynamics of dark energy
• Cosmology and the Fate of Dilatation Symmetry
• The Standard Model Higgs boson as the inflaton
• Dark Energy and the Accelerating Universe
• Results from a search for dark matter in the complete LUX exposure
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• Measurement of the fine-structure constant as a test of the Standard Model
• Amplitude / Higgs Modes in Condensed Matter Physics
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
• Top, Higgs, Diboson and Electroweak Fit to the Standard Model Effective Field Theory
• Complete Higgs Sector Constraints on Dimension-6 Operators
• Model-independent precision constraints on dimension-6 operators
• The Higgs Mode in Disordered Superconductors Close to a Quantum Phase Transition
• Evidence for Higgs boson decay to a pair of muons
• Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
• Collider Physics at the Precision Frontier
• Search for a standard model-like Higgs boson in the mu+ mu- and e+ e- decay channels at the LHC
• Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at $\sqrt{s}=$ 13 TeV
• Search for nonresonant Higgs boson pair production in final states with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for Higgs and $Z$ Boson Decays to $J/\psi \gamma$ and ${\rm Y}(nS)\gamma$ with the ATLAS Detector
• The Search for Dark Matter
• Gauge symmetry from decoupling
• Search for Higgs and $Z$ Boson Decays to $\varphi \gamma$ with the ATLAS Detector
• A warped scalar portal to fermionic dark matter
• The cosmological constant and Higgs mass with emergent gauge symmetries

Cited by in corpus (8)

• Measuring the electron Yukawa coupling via resonant s-channel Higgs production at FCC-ee
• Emergent gauge symmetries -- making symmetry as well as breaking it
• Searches for axion-like particles via $\gamma \gamma$ fusion at future ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ colliders
• Invisible Higgs decay from dark matter freeze-in at stronger coupling
• Constrained Neutrino Mass Matrix and Majorana Phases
• The cosmological constant and scale hierarchies with emergent gauge symmetries
• Holographic Boundary Conformal Field Theory within Horndeski Gravity
• Decay of the Higgs boson to longitudinally polarized leptons and quarks