The Multiverse and Particle Physics

Abstract

The possibility of fundamental theories with very many ground states, each with different physical parameters, changes the way that we approach the major questions of particle physics. Most importantly, it raises the possibility that these different parameters could be realised in different domains in the larger universe. In this review, we survey the motivations for the multiverse and impact of the idea of the multiverse on the search for new physics beyond the Standard Model.

Invited review for Annual Reviews of Nuclear and Particle Science, 37 pages

References in corpus (10)

• Ab initio calculation of the neutron-proton mass difference
• Evidence for the Multiverse in the Standard Model and Beyond
• Constraints on the variability of quark masses from nuclear binding
• Multiverse Understanding of Cosmological Coincidences
• The Weak Scale from BBN
• Is there further evidence for spatial variation of fundamental constants?
• Anthropic considerations in nuclear physics
• Anthropic tuning of the weak scale and of m_u/m_d in two-Higgs-doublet models
• Statistical Understanding of Quark and Lepton Masses in Gaussian Landscapes
• Multiverse Dark Matter: SUSY or Axions

Cited by in corpus (20)

• The Degree of Fine-Tuning in our Universe -- and Others
• An Axion-induced SM/MSSM Higgs Landscape and the Weak Gravity Conjecture
• A New Light Higgs Boson and Short-Baseline Neutrino Anomalies
• Swampland Constraints on Neutrino Masses
• The cosmological constant and the use of cutoffs
• Key Issues Review: Numerical studies of turbulence in stars
• Sensitivity of Carbon and Oxygen Yields to the Triple-Alpha Resonance in Massive Stars
• Alpha-alpha scattering in the Multiverse
• Nuclear Processes in Other Universes: Varying the Strength of the Weak Force
• Phenomenology of A Little Higgs Pseudo-Axion
• Probing nuclear observables via primordial nucleosynthesis
• Neutron stars and the cosmological constant problem
• Effects of Bound Diprotons and Enhanced Nuclear Reaction Rates on Stellar Evolution
• Gravitons and Pions
• Improved Constraints on the Variation of the Weak Scale from Big Bang Nucleosynthesis
• Vacuum energy in the effective field theory of general relativity II: Inclusion of fermions and a comment on the QCD contribution
• Possible Solution to the Triple Alpha Fine-Tuning Problem: Spallation Reactions during Planet Formation
• Non-perturbative reheating and Nnaturalness
• Do alien particles exist, and can they be detected?
• QCD Vacuum Energy and Its Implication for Quark Nugget Stability