Theories relating baryon asymmetry and dark matter

Abstract

The nature of dark matter and the origin of the baryon asymmetry are two of the deepest mysteries of modern particle physics. In the absence of hints regarding a possible solution to these mysteries, many approaches have been developed to tackle them simultaneously leading to very diverse and rich models. We give a short review where we describe the general features of some of these models and an overview on the general problem. We also propose a diagrammatic notation to label the different models.

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

“…9, various mechanisms for DM production in the ADM models (Table 1 of Ref. [246]) are illustrated. One obvious mechanism is to relate the visible (V) sector baryon asymmetry to the dark (D) sector asymmetry via a heavy particle decay both to V and D sectors.…”

“…The idea behind asymmetric dark matter (ADM) [246][247][248] is based on an asymmetry between DM particles and their antiparticles (''anti-DM''). In the early Universe, only the number density difference between the two (asymmetric component) remains after the annihilation of the symmetric components of DM and anti-DM.…”

“…Schemes for ADM production summarized in[246]. some DM quantum numbers are transferred to some visible sector quantum numbers, as we know the lepton number is transferable to the baryon number during the electroweak phase transition era with B − L conservation.…”

New analysis of neutron star constraints on asymmetric dark matter

“…Above this mass, the accretion rate scales as 1/m 2 χ for kinematic reasons: it is less likely that DM particles lose enough energy to be captured in a single scatter. 2 In the following, we are referring to µ F , the averaged Fermi chemical potential of neutrons in DM-neutron collision. It is not a surprise that Pauli blocking affects the capture rate for m χ below 1 GeV.…”

“…However, for Asymmetric Dark Matter (ADM, see e.g. the reviews of [1][2][3][4]), this is very interesting because DM accumulating in the center could form a core which could further gravitationally collapse into a black hole. The requirement that such collapses do not occur gives constraints on the mass and interactions of particle DM.…”