Speaker
Description
The possible presence of dark matter in neutron star interiors may significantly affect their structure and observable properties. Among various candidates, the hypothetical sexaquark has been proposed as a bosonic dark matter particle that could form under the extreme conditions of neutron star cores. In this work, we investigate whether a hybrid neutron star model including hyperons, bosonic dark matter in the form of sexaquarks, and deconfined quark matter can satisfy current observational constraints. The hadronic phase is described using the DD2Y-T model with hyperons, while the quark phase is modeled with a nonlocal Nambu–Jona-Lasinio framework. The phase transition is implemented as a smooth crossover using the replacement interpolation construction. Using Bayesian analysis and incorporating current observational data, including mass–radius measurements and tidal deformability constraints, we find that the presence of sexaquarks softens the equation of state while remaining consistent with observations. The analysis favors a sexaquark mass in the range 1885-1935 MeV, suggesting that neutron star observations can place meaningful constraints on this exotic dark matter candidate.