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Abstract: Minimal walking technicolor models can provide a nontrivial solution forcosmological dark matter, if the lightest technibaryon is doubly charged.Technibaryon asymmetry generated in the early Universe is related to baryonasymmetry and it is possible to create excess of techniparticles with charge-2. These excessive techniparticles are all captured by $^4He$, creating\emph{techni-O-helium} $tOHe$ ``atoms-, as soon as $^4He$ is formed in BigBang Nucleosynthesis. The interaction of techni-O-helium with nuclei opens newpaths to the creation of heavy nuclei in Big Bang Nucleosynthesis. Due to thelarge mass of technibaryons, the $tOHe$ ``atomic- gas decouples from thebaryonic matter and plays the role of dark matter in large scale structureformation, while structures in small scales are suppressed. Nuclearinteractions with matter slow down cosmic techni-O-helium in Earth below thethreshold of underground dark matter detectors, thus escaping severe CDMSconstraints. On the other hand, these nuclear interactions are not sufficientlystrong to exclude this form of Strongly Interactive Massive Particles byconstraints from the XQC experiment. Experimental tests of this hypothesis arepossible in search for $tOHe$ in balloon-borne experiments or on the groundand for its charged techniparticle constituents in cosmic rays andaccelerators. The $tOHe$ ``atoms- can cause cold nuclear transformations inmatter and might form anomalous isotopes, offering possible ways to exclude orprove? their existence.



Author: Maxim Yu. Khlopov, Chris Kouvaris

Source: https://arxiv.org/







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