
TL;DR
This paper proposes a natural model where dark matter is a composite pseudo Nambu-Goldstone boson arising from a non-Abelian gauge sector, with potential explanations for dark matter and muon g-2 anomalies, and distinctive collider signatures.
Contribution
It introduces a minimal, natural model of light chiral dark sector with composite dark pions, linking dark matter, dark photon, and muon g-2, with specific experimental signatures.
Findings
The model's parameter space allows for dark matter consistent with cosmological constraints.
It can potentially explain the muon g-2 discrepancy.
Distinctive collider signatures include monophoton events and dark rho meson production.
Abstract
An interesting possibility for dark matter is a scalar particle of mass of order 10 MeV-1 GeV, interacting with a U(1) gauge boson (dark photon) which mixes with the photon. We present a simple and natural model realizing this possibility. The dark matter arises as a composite pseudo Nambu-Goldstone boson (dark pion) in a non-Abelian gauge sector, which also gives a mass to the dark photon. For a fixed non-Abelian gauge group, SU(N), and a U(1) charge of the constituent dark quarks, the model has only three free parameters: the dynamical scale of the non-Abelian gauge theory, the gauge coupling of the dark photon, and the mixing parameter between the dark and standard model photons. In particular, the gauge symmetry of the model does not allow any mass term for the dark quarks, and stability of the dark pion is understood as a result of an accidental global symmetry. The model has a…
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