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Communication with SIMP dark mesons via Z'-portal

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Title
Communication with SIMP dark mesons via Z'-portal
Author(s)
Hyun Min Lee; Min-Seok Seo
Publication Date
2015-09
Journal
PHYSICS LETTERS B, v.748, no., pp.316 - 322
Publisher
ELSEVIER SCIENCE BV
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→2 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(Nf)×SU(Nf)SU(Nf) flavor symmetry under the SU(Nc) 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. © 2015 The Authors
URI
http://pr.ibs.re.kr/handle/8788114/1730
DOI
10.1016/j.physletb.2015.07.013
ISSN
0370-2693
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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