Violation of C/CP Symmetry Induced by a Scalar Field Emerging from a Two-Brane Universe: A Gateway to Baryogenesis
arxiv(2023)
摘要
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)⊗ U(1) gauge group, which
extends the conventional electromagnetic gauge field in the two-brane universe.
Observational consequences are discussed.
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