Journal of High Energy Physics

, 2016:162 | Cite as

A scenario of heavy but visible baryonic dark matter

  • Ran HuoEmail author
  • Shigeki Matsumoto
  • Yue-Lin Sming Tsai
  • Tsutomu T. Yanagida
Open Access
Regular Article - Theoretical Physics


We consider a model in which dark matter is a composite baryon of a dark sector governed by SU(3) gauge theory, with vector-like quarks also charged under U(1) Y . The model provides simple answer to the dark matter stability problem: it is a result of the accidental dark baryon number conservation. And with an analogy to QCD, all physical quantities of the dark matter can be calculated by rescaling the QCD experimental results. According to the thermal freeze-out mechanism the mass of the dark matter is predicted to be \( \mathcal{O}(100) \) TeV in order to achieve a correct relic abundance. Such heavy dark matter is in general hard for detection due to small dark matter number density in the universe. However, dark baryon number in our model is not necessarily strictly preserved thanks to operators suppressed by the Planck scale, and such decay operator results in a decay lifetime marginal to the current detection bound. We show our model with \( \mathcal{O}\left({10}^{27}\right) \) s dark matter decay life time can explain the AMS-02 anti-proton data, if it is experimentally interpreted as an access, although some theoretical uncertainty may weaken its significance. We also investigate other phenomena of this model such as the extragalactic gamma ray and neutrino signatures.


Cosmology of Theories beyond the SM Technicolor and Composite Models 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Ran Huo
    • 1
    Email author
  • Shigeki Matsumoto
    • 1
  • Yue-Lin Sming Tsai
    • 1
  • Tsutomu T. Yanagida
    • 1
  1. 1.Kavli IPMU (WPI), UTIAS, The University of TokyoKashiwaJapan

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