Chiral composite asymmetric dark matter

• Published in: The journal of high energy physics Vol. 2021; no. 7; pp. 1 - 22
• Main Authors: Ibe, Masahiro, Kobayashi, Shin, Watanabe, Keiichi
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-07-2021; Springer Nature B.V; SpringerOpen
• Subjects: Asymmetry; Beyond Standard Model; Classical and Quantum Gravitation; Cosmology of Theories beyond the SM; Dark matter; Elementary Particles; Flavor (particle physics); High energy physics; Photons; Physics; Physics and Astronomy; Pions; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Standard model (particle physics); String Theory; Symmetry; Beyond Standard Model; Cosmology of Theories beyond the SM
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP07(2021)220

A
bstract
The asymmetric dark matter (ADM) scenario solves the baryon-dark matter coincidence problem when the dark matter (DM) mass is of
O
1
GeV. Composite ADM models based on QCD-like strong dynamics are particularly motivated since the strong dynamics naturally provides the DM mass of
O
1
GeV and the large annihilation cross-section simultaneously. In those models, the sub-GeV dark photon often plays an essential role in transferring the excessive entropy in the dark sector into the visible sector, i.e., the Standard Model sector. This paper constructs a chiral composite ADM model where the U(1)
D
gauge symmetry is embedded into the chiral flavor symmetry. Due to the dynamical breaking of the chiral flavor symmetry, the model naturally provides the masses of the dark photon and the dark pions in the sub-GeV range, both of which play crucial roles for a successful ADM model.