Baryon Asymmetry of the Universe from Preon Confinement and Supersymmetry Breaking

Abstract

We propose a mechanism for generating the baryon asymmetry of the universe (BAU) within a supersymmetric preon model based on $U(1)\times SU(3)$ internal symmetry. Integrating out massive preons at the confinement scale $Λ_{cr} \sim 10^{14}$ GeV induces a Chern-Simons (CS) term in the effective gauge action via the Callan-Harvey anomaly inflow mechanism, deriving rather than assuming the topological structure required for the model. The confinement transition, at which supersymmetry breaks intrinsically through the differential condensation of fermionic and bosonic preon composites, provides the necessary departure from thermal equilibrium. The time-varying CS coefficient sources a net topological charge, which the anomaly equation converts directly into baryon number. Electroweak sphalerons are out of equilibrium at $Λ_{cr}$, protecting the asymmetry from immediate washout. Matching the observed baryon-to-entropy ratio $η\sim 8.7\times 10^{-10}$ constrains the fermion/boson condensation asymmetry to $ε\simeq 0.022$, a value consistent with a one-loop origin. This mechanism is structural rather than statistical, and the electroweak phase transition plays no role.