Charged <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math> mesogenesis
Fatemeh Elahi, Gilly Elor, Robert McGehee
Abstract
We leverage the $CP$ violation in charged $B$ meson decays to generate the observed baryon asymmetry and dark matter at $\mathcal{O}(10\text{ }\text{ }\mathrm{MeV})$ temperatures. We realize this in two scenarios: ${B}_{c}^{+}$ mesogenesis and ${B}^{+}$ mesogenesis. In the first, $CP$-violating ${B}_{c}^{\ifmmode\pm\else\textpm\fi{}}$ decays to ${B}^{\ifmmode\pm\else\textpm\fi{}}$ mesons are followed by decays to dark and Standard Model baryons. In the second, $CP$-violating ${B}^{\ifmmode\pm\else\textpm\fi{}}$ decays to lighter charged mesons are accompanied by the latter's decays to dark and Standard Model leptons, which then scatter into the baryon asymmetry. ${B}_{c}^{+}$ mesogenesis is actively being probed at Belle and LHCb, while ${B}^{+}$ mesogenesis can be tested at colliders and sterile neutrino searches.