Kavli Affiliate: Hitoshi Murayama
| First 5 Authors: Joe Davighi, Serah Moldovsky, Hitoshi Murayama, Christiane Scherb, Nudzeim Selimovic
| Summary:
We point out that a QCD-like dark sector can be coupled to the Standard Model
by gauging the topological Skyrme current, which measures the dark baryon
number in the infrared, to give a technically natural model for dark matter.
This coupling allows for a semi-annihilation process $chi chi rightarrow
chi X_mu$, where $X_mu$ is the gauge boson mediator and $chi$ a dark pion
field, which plays the dominant role in setting the dark matter relic
abundance. The topological interaction is purely $p$-wave and so free from
indirect detection constraints. We show that the dark matter pion mass needs to
be in the range $10$ MeV $lesssim m_chi lesssim$ $1$ TeV; towards the
lighter end of this range, there can moreover be significant self-interactions.
We discuss prospects for probing this scenario at collider experiments, ranging
from the LHC to low-energy $e^+ e^-$ colliders, future Higgs factories, and
beam-dump experiments.
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