Matter-antimatter asymmetry in generalized coupling theories

Abstract

We explore the gravitational baryogenesis paradigm in the homogeneous and isotropic cosmology of generalized coupling gravity and, in particular, of the so-called Minimal Exponential Measure Model (MEMe). We show that, also in this theory, the time derivative of the Ricci scalar couples with matter currents and can preserve an unbalance in the baryon-antibaryon number beyond thermal equilibrium. Using the current bounds on the ratio of baryon number to entropy density, we can considerably improve the known constraints on the parameter q that characterizes the MEMe model. This estimate also allows us to draw stringent constraints on the spatial curvature of the cosmological model.

References in corpus (26)

• Planck 2015 results. XIII. Cosmological parameters
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Foreground Emission
• Everything You Always Wanted To Know About The Cosmological Constant Problem (But Were Afraid To Ask)
• Planck 2013 results. XV. CMB power spectra and likelihood
• Gravitational Baryogenesis
• What Is The BBN Prediction for the Baryon Density and How Reliable Is It?
• Baryogenesis in $f(Q,\mathcal{T})$ Gravity
• Baryogenesis in $f(R)$-Theories of Gravity
• Gauss-Bonnet Gravitational Baryogenesis
• $f(T)$ gravitational baryogenesis
• Neutrino coupling to cosmological background: A review on gravitational Baryo/Leptogenesis
• $f(R,T)$ models applied to Baryogenesis
• Gravity with Auxiliary Fields
• Loop Quantum Cosmology Gravitational Baryogenesis
• Baryogenesis in non-extensive Tsallis Cosmology
• Baryogenesis in Nonminimally Coupled $f(R)$ Theories
• Baryon Asymmetry from the Generalized Uncertainty Principle
• Standard Model Extension with Gravity and Gravitational Baryogenesis
• Gravitational Baryogenesis after Anisotropic Inflation
• New class of generalized coupling theories
• Gravitationally Induced Dark Matter Asymmetry and Dark Nucleon Decay
• Non-GUT Baryogenesis and Large Scale Structure of the Universe
• Generalising the coupling between spacetime and matter
• Minimal exponential measure model in the post-Newtonian limit