Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-07-10
Phys.Lett.B646:172-176,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
RevTex, 5 pages. Expanded and modified abstract and introduction, results and conclusions unchanged
Scientific paper
10.1016/j.physletb.2007.01.023
We consider cosmological consequences of the spontaneous breaking of a global symmetry that is anomalous under technicolor interactions, leading to the emergence of a light axion-like particle. Avoiding overclosure of the universe by such axions yields the upper bound $f_a \lsim 10^{10}$ GeV on the symmetry breaking scale, corresponding to keV-scale axions. However, diffuse x-ray background data typically require larger values of $f_a$. The overclosure and x-ray bounds can be reconciled if the axion initial amplitude of oscillations $A_i \sim f_a/10$. In this case, a viable axionic dark matter candidate with a mass in the 50-100 eV range emerges. The detection of this type of dark matter may pose a challenge.
No associations
LandOfFree
Cosmology with Light Axions from Technicolor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmology with Light Axions from Technicolor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmology with Light Axions from Technicolor will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-138163