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arXiv · 1504.00745

Communication with SIMP dark mesons via Z'-portal

Hyun Min Lee·Min-Seok Seo
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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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Hyun Min Lee, Min-Seok Seo. 2015-07-16. Communication with SIMP dark mesons via Z'-portal. https://doi.org/10.1016/j.physletb.2015.07.013

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