Braneworld Baryogenesis and QCD-Era Magnetogenesis: A Predictive Link

Abstract

We demonstrate that primordial magnetic fields (PMF) play a decisive role in the braneworld baryogenesis scenario of [Phys. Rev. D $\text{110}$, 023520 (2024)], where C/CP violation arises from the coupling of visible and hidden matter-antimatter sectors through a pseudo-scalar field. Although this mechanism generates baryon number efficiently only after the quark-hadron transition, by incorporating a realistic stochastic PMF within a semi-analytical framework, we find that matching the observed baryon-antibaryon asymmetry robustly requires PMF strengths of order $10^{10}$ T right after the transition, in agreement with causal QCD-era magnetogenesis. We further reveal that magnetic fluctuations drive the baryon-density spectrum to white noise on large scales, yielding an isocurvature component compatible with Cosmic Microwave Background (CMB) bounds. This establishes a predictive link between the braneworld baryogenesis model and realistic early-Universe magnetic fields.

16 pages, 2 figures, 3 tables. Final version published in European Physical Journal C

References in corpus (28)

• Astrophysical magnetic fields and nonlinear dynamo theory
• The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
• Origin of Galactic and Extragalactic Magnetic Fields
• Cosmological Magnetic Fields: Their Generation, Evolution and Observation
• A Cyclic Model of the Universe
• The stochastic gravitational wave background from turbulence and magnetic fields generated by a first-order phase transition
• The origin, evolution and signatures of primordial magnetic fields
• Matter and Antimatter in the Universe
• Primordial magnetogenesis
• The Evolution of Cosmic Magnetic Fields: From the Very Early Universe, to Recombination, to the Present
• Primordial Magnetic Fields and Causality
• The First Magnetic Fields
• Gravitational wave production: A strong constraint on primordial magnetic fields
• Baryogenesis from the weak scale to the grand unification scale
• Observational constraints on the curvaton model of inflation
• Progress on Cosmological Magnetic Fields
• Evolution of hydromagnetic turbulence from the electroweak phase transition
• Large-scale magnetic fields can explain the baryon asymmetry of the Universe
• Magnetic Fields from QCD Phase Transitions
• Particle decay in inflationary cosmology
• Reproducing Cosmic Microwave Background anisotropies with mixed isocurvature perturbations
• Leptogenesis and Primordial Magnetic Fields
• Equivalence between domain-walls and "noncommutative" two-sheeted spacetimes: Model-independent matter swapping between branes
• The evolution of primordial magnetic field since its generation
• Sub-GeV-scale signatures of hidden braneworlds up to the Planck scale in a $SO(3,1)$-broken bulk
• Matter power spectrum induced by primordial magnetic fields: from the linear to the non-linear regime
• Can neutron disappearance/reappearance experiments definitively rule out the existence of hidden braneworlds endowed with a copy of the Standard Model?
• Violation of C/CP Symmetry Induced by a Scalar Field Emerging from a Two-Brane Universe: A Gateway to Baryogenesis