Varying couplings in the early universe: correlated variations of $\alpha$ and $G$

Abstract

The Cosmic Microwave Background anisotropies provide a unique opportunity to constrain simultaneous variations of the fine-structure constant $\alpha$ and Newton's gravitational constant $G$. Those correlated variations are possible in a wide class of theoretical models. In this brief paper we show that the current data, assuming that particle masses are constant, gives no clear indication for such variations, but already prefers that any relative variations in $\alpha$ should be of the same sign of those of $G$ for variations of $\sim 1$. We also show that a cosmic complementarity is present with Big Bang Nucleosynthesis and that a combination of current CMB and BBN data strongly constraints simultaneous variations in $\alpha$ and $G$. We finally discuss the future bounds achievable by the Planck satellite mission.

arXiv comment6 pages, 5 figures; one author added, now includes discussion of BBN constraints

References in corpus (45)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• The fundamental constants and their variation: observational status and theoretical motivations
• Further evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra
• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
• Violations of the equivalence principle in a dilaton-runaway scenario
• Limits on the time variation of the electromagnetic fine-structure constant in the low energy limit from absorption lines in the spectra of distant quasars
• CMB constraints on Dark Matter models with large annihilation cross-section
• Extended Mosaic Observations with the Cosmic Background Imager
• High resolution CMB power spectrum from the complete ACBAR data set
• Measurement of Newton's Constant Using a Torsion Balance with Angular Acceleration Feedback
• PArthENoPE: Public Algorithm Evaluating the Nucleosynthesis of Primordial Elements
• The primordial abundance of 4He: evidence for non-standard big bang nucleosynthesis
• Nuclear Reaction Network for Primordial Nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields
• Improved measurements of the temperature and polarization of the CMB from QUaD
• A Measurement of the CMB <EE> Spectrum from the 2003 Flight of BOOMERANG
• A Measurement of the Angular Power Spectrum of the CMB Temperature Anisotropy from the 2003 Flight of Boomerang
• Measurement of Cosmic Microwave Background Polarization Power Spectra from Two Years of BICEP Data
• A New Approach to Systematic Uncertainties and Self-Consistency in Helium Abundance Determinations
• A measurement of the polarization-temperature angular cross power spectrum of the Cosmic Microwave Background from the 2003 flight of BOOMERANG
• Early-universe constraints on a time-varying fine structure constant
• Constraining Variations in the Fine-Structure Constant with the Cosmic Microwave Background
• Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio
• Cepheid Calibrations of Modern Type Ia Supernovae:Implications for the Hubble Constant
• Possible Constraints on the Time Variation of the Fine Structure Constant from Cosmic Microwave Background Data
• Cosmic concordance and the fine structure constant
• Measuring $\alpha$ in the Early Universe: CMB Polarization, Reionization and the Fisher Matrix Analysis
• Primordial nucleosynthesis as a probe of fundamental physics parameters
• WMAP Constraints on varying $\alpha$ and the Promise of Reionization
• Probing the Friedmann equation during recombination with future CMB experiments
• A new measure of Delta alpha/alpha at redshift z = 1.84 from very high resolution spectra of Q1101-264
• Time variation of G and αwithin models with extra dimensions
• An Observational Determination of the Proton to Electron Mass Ratio in the Early Universe
• A Cosmological Tale of Two Varying Constants
• Measuring $\alpha$ in the Early Universe: CMB Temperature, Large-Scale Structure and Fisher Matrix Analysis
• From Cavendish to PLANCK: Constraining Newton's Gravitational Constant with CMB Temperature and Polarization Anisotropy
• New Constraints on variations of the fine structure constant from CMB anisotropies
• CMB constraints on the fine structure constant
• Constraining the time variation of the coupling constants from cosmic microwave background: effect of Λ_{QCD}
• Constraints on the time variation of the fine structure constant by the 5-year WMAP data
• Constraints on time variation of fine structure constant from WMAP-3yr data
• WMAP 5-year constraints on time variation of $\alpha$ and $m_e$ in a detailed recombination scenario
• Stringent bounds to spatial variations of the electron-to-proton mass ratio in the Milky Way

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• Cosmology and Fundamental Physics with the Euclid Satellite
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• General Relativity and Cosmology: Unsolved Questions and Future Directions
• The status of varying constants: a review of the physics, searches and implications
• New constraints on time-dependent variations of fundamental constants using Planck data
• Search for a drifting proton--electron mass ratio from H${}_2$
• The variation of fundamental constants and the role of A=5 and A=8 nuclei on primordial nucleosynthesis
• Constraining Fundamental Physics with Future CMB Experiments
• The Wall of Fundamental Constants
• Black string corrections in variable tension braneworld scenarios
• Microwave and submillimeter molecular transitions and their dependence on fundamental constants
• Dark matter in ghost-free bigravity theory: From a galaxy scale to the universe
• The minimally extended Varying Speed of Light (meVSL)
• Cosmological constraints on the gravitational constant
• Gyromagnetic Factors and Atomic Clock Constraints on the Variation of Fundamental Constants
• Fundamental cosmology in the E-ELT era: The status and future role of tests of fundamental coupling stability
• Constraints on variation in $\alpha$ and $m_e$ from WMAP 7-year data
• Scaling Transformations and the Origins of Light Relics Constraints from Cosmic Microwave Background Observations
• Properties and uncertainties of scalar field models of dark energy with barotropic equation of state
• Where are the Walls?
• Dimensionless cosmology
• Mirror Dark Sector Solution of the Hubble Tension with Time-varying Fine-structure Constant
• Constraining PCP Violating Varying Alpha Theory Through Laboratory Experiments
• Analysing the Effect on CMB in a Parity and Charge Parity Violating Varying Alpha Theory