Annihilating asymmetric dark matter
نویسندگان
چکیده
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 کاملThe Structure of Dark Matter Halos in an Annihilating Dark Matter Model
The inability of standard non-interacting cold dark matter (CDM) to account for the small scale structure of individual galaxies has led to the suggestion that the dark matter may undergo elastic and/or inelastic scattering. We simulate the evolution of an isolated dark matter halo which undergoes both scattering and annihilation. Annihilations produce a core that grows with time due to adiabat...
متن کاملStrong CMB Constraint On P -Wave Annihilating Dark Matter
We consider a dark sector consisting of dark matter that is a Dirac fermion and a scalar mediator. This model has been extensively studied in the past. If the scalar couples to the dark matter in a parity conserving manner then dark matter annihilation to two mediators is dominated by the P -wave channel and hence is suppressed at very low momentum. The indirect detection constraint from the an...
متن کاملAnnihilating Dark Matter and the Galactic Positron Excess
The possibility that the Galactic dark matter is composed of neutralinos that are just above half the Z mass is examined, in the context of the Galactic positron excess. In particular, we check if the anomalous bump in the cosmic ray positron to electron ratio at 10 GeV can be explained with the “decay” of virtual Z bosons produced when the neutralinos annihilate. We find that the low energy be...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2015
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.91.023505