New Ideas in Baryogenesis: A Snowmass White Paper

Abstract

The Standard Model of Particle Physics cannot explain the observed baryon asymmetry of the Universe. This observation is a clear sign of new physics beyond the Standard Model. There have been many recent theoretical developments to address this question. Critically, many new physics models that generate the baryon asymmetry have a wide range of repercussions for many areas of theoretical and experimental particle physics. This white paper provides an overview of such recent theoretical developments with an emphasis on experimental testability. Model Key Ingredients Observable scale Observables Axiogenesis Axion misalignment, sphalerons axion scale ~ O( 10 8-11 GeV) axion mass ~ 𝜇eV Gravitational waves WR baryogenesis axion inflation, WR interactions with the inflaton LR symmetry breaking ~ O( 10 10 GeV) Gravitational waves QCD Baryogenesis Singlet scalar coupled to the gluon field strength,

Introduction to Electroweak Baryogenesis

“…This review introduced a general overview of the mechanism focusing principally on aspects that are less detailed in other documents. Of course, many other mechanisms exist in the market and a recent state-of-the-art can be found in [30]. See e.g., [10] on why N CS is an integer.…”

Baryogenesis and dark matter in the mirror twin Higgs

“…Thus, the same structure for the final number density appears in the DM sector of the MTH. The remaining asymmetric component of the DM plasma sets the final DM number density [7,[25][26][27]. Therefore, the twin ϵ CP will also be proportional to the complex phase of the couplings of the twin sector, which we generically denote as sin ϕ.…”