Topics in Cosmology and Theoretical High Energy Physics: Dark Astronomical Compact Objects (DACOs), Heavy Mirror Mesons

Nearly 80% of matter in the Universe is dark matter although its nature is as mysterious as its name. By assuming that dark matter particles are composite strongly interacting bosons, we examine formation conditions and stability conditions of Dark Astronomical Compact Objects (DACOs). We also propose a cooling mechanism for DACOs and methods of detecting them. These conditions are applied to the "Luminogenesis" model of dark matter proposed by P. Q. Hung and P. Frampton.

We also examine the properties of mirror quarks in the "Electroweak-scaled right-handed neutrino" model proposed by P. Q. Hung. Production and decay processes of mirror mesons and hybrid mesons, especially those that occur at displaced vertices, are examined by theoretical approach and by using simulation tools.