Cosmology with Light Axions from Technicolor
Hooman Davoudiasl
Abstract
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 fa 1010 GeV on the symmetry breaking scale, corresponding to keV-scale axions. However, diffuse x-ray background data typically require larger values of fa. The overclosure and x-ray bounds can be reconciled if the axion initial amplitude of oscillations Ai fa/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.
Create a lesson
Related papers
First-principle predictions of fragmentation functions via quantum computing
Juan J. Gálvez-Viruet, Felipe J. Llanes-Estrada, Nicolas M. Arenaza et al.
High energy thermal photons from chirally imbalanced QGP
Sourav Duari, Nilanjan Chaudhuri, Pradip Roy et al.
Spin-dependent fermion potentials from mixed tensor couplings of massive spin-1 and spin-2 bosons
D. Khadka, V. V. Flambaum
Building a Better Beta: Nucleation and Timescales in Cosmological Phase Transitions
William Searle, Csaba Balázs
Quantum Steering Geometry at High Energy Particle Colliders
Juan J. Mejia Alvarez, Andrew J. Wildridge, Angelo Arisi et al.
Quantum-statistical effects of bosonic warm dark matter in microscopic interacting dark sectors
Zhijian Zhang