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순수물리이론 연구단
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Baryon-dark matter coincidence in mirrored unification

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Title
Baryon-dark matter coincidence in mirrored unification
Author(s)
Masahiro Ibe; Ayuki Kamada; Shin Kobayashi; Takumi Kuwahara; Wakutaka Nakano
Publication Date
2019-10
Journal
PHYSICAL REVIEW D, v.100, no.7, pp.075022 - 1
Publisher
AMER PHYSICAL SOC
Abstract
About 80% of the mass of the present Universe is made up of the unknown (dark matter), while the rest is made up of ordinary matter. It is a very intriguing question why the mass densities of dark matter and ordinary matter (mainly baryons) are close to each other. It may hint the identity of dark matter and furthermore the structure of a dark sector. A mirrored world provides a natural explanation to this puzzle. On the other hand, if the mirror-symmetry breaking scale is low, it tends to cause cosmological problems. In this work, we propose a mirrored unification framework, which breaks mirror symmetry at the grand unified scale, but still addresses the puzzle. The dark matter mass is strongly related with the dynamical scale of quantum chromodynamics, which explains the closeness of the dark matter and baryon masses. Intermediate-energy portal interactions share the generated asymmetry between the visible and dark sectors. Furthermore, our framework is safe from cosmological issues by providing low-energy portal interactions to release the superfluous entropy of the dark sector into the visible sector. C.Published by the American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6835
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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