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순수물리이론 연구단
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Ultraviolet completion of a composite asymmetric dark matter model with a dark photon portal

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Title
Ultraviolet completion of a composite asymmetric dark matter model with a dark photon portal
Author(s)
Masahiro Ibe; Ayuki Kamada; Shin Kobayashi; Takumi Kuwahara; Wakutaka Nakanoa
Publication Date
2019-03
Journal
JOURNAL OF HIGH ENERGY PHYSICS, v.2019, no.3, pp.03 - 173
Publisher
SPRINGER
Abstract
Composite asymmetric dark matter scenarios naturally explain why the dark matter mass density is comparable with the visible matter mass density. Such scenarios generically require some entropy transfer mechanism below the composite scale; otherwise, their late-time cosmology is incompatible with observations. A tiny kinetic mixing between a dark photon and the visible photon is a promising example of the low-energy portal. In this paper, we demonstrate that grand unifications in the dark and the visible sectors explain the origin of the tiny kinetic mixing. We particularly consider an ultraviolet completion of a simple composite asymmetric dark matter model, where asymmetric dark matter carries a B − L charge. In this setup, the longevity of asymmetric dark matter is explained by the B − L symmetry, while the dark matter asymmetry originates from the B−L asymmetry generated by thermal leptogenesis. In our minimal setup, the Standard Model sector and the dark sector are unified into SU(5) GUT × SU(4) DGUT gauge theories, respectively. This model generates required B − L portal operators while suppressing unwanted higher-dimensional operators that could wash out the generated B − L asymmetry. © 2019, The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/5885
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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