Stealth dark matter confinement transition and gravitational waves

29 Jun 2020  ·  Brower R. C. Lattice Strong Dynamics Collaboration, Cushman K. Lattice Strong Dynamics Collaboration, Fleming G. T. Lattice Strong Dynamics Collaboration, Gasbarro A. Lattice Strong Dynamics Collaboration, Hasenfratz A. Lattice Strong Dynamics Collaboration, Jin X. Y. Lattice Strong Dynamics Collaboration, Kribs G. D. Lattice Strong Dynamics Collaboration, Neil E. T. Lattice Strong Dynamics Collaboration, Osborn J. C. Lattice Strong Dynamics Collaboration, Rebbi C. Lattice Strong Dynamics Collaboration, Rinaldi E. Lattice Strong Dynamics Collaboration, Schaich D. Lattice Strong Dynamics Collaboration, Vranas P. Lattice Strong Dynamics Collaboration, Witzel O. Lattice Strong Dynamics Collaboration ·

We use non-perturbative lattice calculations to investigate the finite-temperature confinement transition of stealth dark matter, focusing on the regime in which this early-universe transition is first order and would generate a stochastic background of gravitational waves. Stealth dark matter extends the standard model with a new strongly coupled SU(4) gauge sector with four massive fermions in the fundamental representation, producing a stable spin-0 'dark baryon' as a viable composite dark matter candidate... Future searches for stochastic gravitational waves will provide a new way to discover or constrain stealth dark matter, in addition to previously investigated direct-detection and collider experiments. As a first step to enabling this phenomenology, we determine how heavy the dark fermions need to be in order to produce a first-order stealth dark matter confinement transition. read more

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High Energy Physics - Lattice High Energy Physics - Phenomenology