Cosmology and the Standard Model

Abstract

We consider the properties of an ensemble of universes as function of size, where size is defined in terms of the asymptotic value of the Hubble constant (or, equivalently, the value of the cosmological constant). We assume that standard model parameters depend upon size in a manner that we have previously suggested, and provide additional motivation for that choice. Given these assumptions, it follows that universes with different sizes will have different physical properties, and we estimate, very roughly, that only if a universe has a size within a factor of a square root of two or so of our own will it support life as we know it. We discuss implications of this picture for some of the basic problems of cosmology and particle physics, as well as the difficulties this point of view creates.

49 pages

References in corpus (14)

• Supersymmetric Dark Matter
• The Cosmological Constant
• Cosmological Constraints on Lorentz Violation in Electrodynamics
• Superfluid analogies of cosmological phenomena
• Disturbing Implications of a Cosmological Constant
• Trialogue on the number of fundamental constants
• Variation of Fundamental Couplings and Nuclear Forces
• Analog gravity from field theory normal modes?
• Einstein Gravity as an emergent phenomenon?
• Universe Generation from Black Hole Interiors
• Photons and Gravitons as Goldstone Bosons, and the Cosmological Constant
• Limits on Cosmological Variation of Strong Interaction and Quark Masses from Big Bang Nucleosynthesis, Cosmic, Laboratory and Oklo Data
• Universes inside a $\Lambda$ black hole
• Standard Model Parameters and the Cosmological Constant

Cited by in corpus (51)

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• Cosmological constant and vacuum energy: old and new ideas
• Lorentz and CPT Violation in Neutrinos
• Spontaneous Lorentz and Diffeomorphism Violation, Massive Modes, and Gravity
• What Do We Know About Lorentz Invariance?
• Vacuum Cherenkov radiation
• Probing Lorentz and CPT violation with space-based experiments
• The Cherenkov effect in Lorentz-violating vacua
• Dirac theory within the Standard-Model Extension
• Vacuum Fluctuations of Energy Density can lead to the observed Cosmological Constant
• Limits on isotropic Lorentz violation in QED from collider physics
• Nonlocal Effective Gravitational Field Equations and the Running of Newton's G
• Tests of Lorentz symmetry in the gravitational sector
• A-term inflation and the MSSM
• Massive photons and Lorentz violation
• Probing the Lorentz Symmetry Violation Using the First Image of Sagittarius A*: Constraints on Standard-Model Extension Coefficients
• Classical-physics applications for Finsler $b$ space
• Dependence of hadronic properties on Quark Masses and Constraints on their Cosmological Variation
• Time-delay and Doppler tests of the Lorentz symmetry of gravity
• Particle-accelerator constraints on isotropic modifications of the speed of light
• Limits on light-speed anisotropies from Compton scattering of high-energy electrons
• Matter Non-conservation in the Universe and Dynamical Dark Energy
• Asymptotic states and renormalization in Lorentz-violating quantum field theory
• The Degree of Fine-Tuning in our Universe -- and Others
• Non-local on-shell field redefinition for the SME
• Gedanken Worlds without Higgs: QCD-Induced Electroweak Symmetry Breaking
• Discrete quantum gravity: a mechanism for selecting the value of fundamental constants
• Propagation in a thermal graviton background
• The Effective Theory of Gravity and Dynamical Vacuum Energy
• Bounds on Lorentz and CPT Violation from the Earth-Ionosphere Cavity
• Cavity tests of parity-odd Lorentz violations in electrodynamics
• Testing Lorentz Invariance Using an Odd-Parity Asymmetric Optical Resonator
• Beta-Decay Spectrum and Lorentz Violation
• On thermodynamic and quantum fluctuations of cosmological constant
• CPT and Lorentz-invariance violation
• Exotic Rotational Correlations in Quantum Geometry
• Critical properties of scalar field theory with Lorentz violation: Exact treatment of Lorentz-violating mechanism
• Starry Messages: Searching for Signatures of Interstellar Archaeology
• Observational Constraints on Local Lorentz Invariance
• Atomic and optical tests of Lorentz symmetry
• A Preon Model Based Universe
• CPT-symmetry studies with antihydrogen
• Superfluidity and Stationary Space-Times
• Decaying vacuum and evolution from early inflation to late acceleration
• Running vacuum model versus $\Lambda$CDM -- a Bayesian analysis
• Lorentz violation as a quantum-gravity signature
• Implications of the Reduction Principle for Cosmological Natural Selection