منابع مشابه
Asymmetric Sneutrino Dark Matter
It is known that the cosmological baryon density (Ωb) and dark matter density (Ωdm) have strikingly similar values. However, in most theories of the early Universe, each density is explained by separate dynamics and consequently there is no compelling reason for this observation. In this note, I briefly review a model in which the dark matter possesses a particleantiparticle asymmetry. This asy...
متن کاملAsymmetric Dark Matter
We consider a simple class of models in which the relic density of dark matter is determined by the baryon asymmetry of the universe. In these models a B−L asymmetry generated at high temperatures is transfered to the dark matter, which is charged under B − L. The interactions that transfer the asymmetry decouple at temperatures above the dark matter mass, freezing in a dark matter asymmetry of...
متن کاملTwin Higgs Asymmetric Dark Matter.
We study asymmetric dark matter (ADM) in the context of the minimal (fraternal) twin Higgs solution to the little hierarchy problem, with a twin sector with gauged SU(3)^{'}×SU(2)^{'}, a twin Higgs doublet, and only third-generation twin fermions. Naturalness requires the QCD^{'} scale Λ_{QCD}^{'}≃0.5-20 GeV, and that t^{'} is heavy. We focus on the light b^{'} quark regime, m_{b^{'}}≲Λ_{QCD}^...
متن کاملExcluding light asymmetric bosonic dark matter.
We argue that current neutron star observations exclude asymmetric bosonic noninteracting dark matter in the range from 2 keV to 16 GeV, including the 5-15 GeV range favored by DAMA and CoGeNT. If bosonic weakly interacting massive particles (WIMPs) are composite of fermions, the same limits apply provided the compositeness scale is higher than ∼10¹² GeV (for WIMP mass ∼1 GeV). In the case of...
متن کاملStable Bound States of Asymmetric Dark Matter
The simplest renormalizable effective field theories with asymmetric dark matter bound states contain two additional gauge singlet fields one being the dark matter and the other a mediator particle that the dark matter annihilates into. We examine the physics of one such model with a Dirac fermion as the dark matter. For a range of parameters the Yukawa coupling of the dark matter to the mediat...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2018
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.97.103510