
TL;DR
This paper presents a model where a new gauge symmetry and dark sphalerons generate the observed baryon asymmetry and dark matter relic abundance, linking them through anomaly cancellation and radiative mass generation.
Contribution
It introduces a novel dark baryogenesis model with a new gauge group, anomaly-free messenger fermions, and a mechanism for dark matter stability and relic abundance.
Findings
The model naturally explains the baryon-to-dark matter ratio.
Dark matter mass is generated radiatively near the electroweak scale.
Predicts long-lived particles observable at colliders.
Abstract
We first suggested a scenario in which a generic, dark chiral gauge group undergoes a first order phase transition in order to generate the observed baryon asymmetry in the universe, provide a viable dark matter candidate and explain the observed baryon-to-dark matter ratio of relic abundances [arXiv:1003.0899]. We now provide a model in which a copy of the electroweak gauge group is added to the Standard Model. We spontaneously break this new gauge group to the diagonal Z_2 center which is used to stabilize a dark matter candidate. In addition to the dark matter candidate, anomaly free messenger fermions are included which transform non-trivially under all the gauge groups. In analogy to electroweak baryogenesis, the model generates an excess of messenger "baryons". These "baryons" subsequently decay to the Standard Model and dark matter to generate an excess of Standard Model baryons.…
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Particle physics theoretical and experimental studies · Computational Physics and Python Applications
