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arXiv · 2307.10637

Violation of C/CP Symmetry Induced by a Scalar Field Emerging from a Two-Brane Universe: A Gateway to Baryogenesis

Michael Sarrazin·Coraline Stasser
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Abstract

A model of baryogenesis is introduced where our usual visible Universe is a 3-brane coevolving with a hidden 3-brane in a multidimensional bulk. The visible matter and antimatter sectors are naturally coupled with the hidden matter and antimatter sectors, breaking the C/CP invariance and leading to baryogenesis occurring after the quark-gluon era. The issue of leptogenesis is also discussed. The symmetry breaking spontaneously occurs due to the presence of an extra scalar field supported by the $U(1)\otimes U(1)$ gauge group, which extends the conventional electromagnetic gauge field in the two-brane universe. Observational consequences are discussed.

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Michael Sarrazin, Coraline Stasser. 2023-07-20. Violation of C/CP Symmetry Induced by a Scalar Field Emerging from a Two-Brane Universe: A Gateway to Baryogenesis. https://doi.org/10.1103/physrevd.110.023520

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