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Cosmological and Astrophysical Impacts of Hadronic Dark Matter

Glennys Farrar (New York University) // August 16, 2022

Abstract: It is possible that a neutral, baryon number = 2 bound state of uuddss quarks is stable or effectively stable, with mass in the range ~ 1.85 – 2.05 GeV. Surprisingly, such a state would have escaped detection in particle experiments to date. After briefly introducing the particle (called Sexaquark, S) and explaining why it would have eluded detection, I will show that its relic abundance as estimated from statistical mechanics and the parameters of QCD, is compatible with the observed dark matter to baryon ratio. The consistency of S properties with direct detection experiments, neutron stars and astrophysics/cosmology constraints will be discussed. Some interesting possible cosmological impacts will be presented. Production of S-Sbar pairs in e+e- collisions would not have been detected and would naturally explain the two particle physics puzzles of g-2 and lattice HVP not agreeing with direct measurements of e+e- -> hadrons.

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