A model for pseudo-scalar dark matter is built from a broken dark U(1)_X gauge symmetry without dark fermions, yielding a stable pseudo-NGB with suppressed direct detection and viable relic density via annihilations into SM particles or light scalars.
Communication with SIMP dark mesons via Z'-portal
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abstract
We consider a consistent extension of the SIMP models with dark mesons by including a dark U(1)_D gauge symmetry. Dark matter density is determined by a thermal freeze-out of the $3\to2$ self-annihilation process, thanks to the Wess-Zumino-Witten term. In the presence of a gauge kinetic mixing between the dark photon and the SM hypercharge gauge boson, dark mesons can undergo a sufficient scattering off the Standard Model particles and keep in kinetic equilibrium until freeze-out in this SIMP scenario. Taking the SU(N_f)xSU(N_f)/SU(N_f) flavor symmetry under the SU(N_c) confining group, we show how much complementary the SIMP constraints on the parameters of the dark photon are for current experimental searches for dark photon.
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UNVERDICTED 2representative citing papers
The thesis presents a new 3-to-2 freezeout mechanism, bound-state effects on searches, a new axion interferometric search, reionization assessments, 21-cm constraints, and the DarkHistory code for ionization and thermal histories.
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Pseudo-scalar dark matter from a broken gauged symmetry
A model for pseudo-scalar dark matter is built from a broken dark U(1)_X gauge symmetry without dark fermions, yielding a stable pseudo-NGB with suppressed direct detection and viable relic density via annihilations into SM particles or light scalars.
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Dark Matter Energy Deposition and Production from the Table-Top to the Cosmos
The thesis presents a new 3-to-2 freezeout mechanism, bound-state effects on searches, a new axion interferometric search, reionization assessments, 21-cm constraints, and the DarkHistory code for ionization and thermal histories.