A scenario of heavy but visible baryonic dark matter

A bstract 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 con...

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Bibliographic Details
Published in:The journal of high energy physics 2016-09, Vol.2016 (9), p.1-15, Article 162
Main Authors: Huo, Ran, Matsumoto, Shigeki, Tsai, Yue-Lin Sming, Yanagida, Tsutomu T.
Format: Article
Language:English
Subjects:
Alpha Magnetic Spectrometer
Baryons
Classical and Quantum Gravitation
Conservation
Dark matter
Decay
Elementary Particles
High energy physics
Mathematical models
Operators
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Signatures
String Theory
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Summary:A bstract 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 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 O 10 27 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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP09(2016)162