Appearance of sexaquark in the core of neutron stars as a candidate of dark matter

Abstract We study the appearance of sexaquark (uuddss) as a candidate dark matter in core neutron stars while there has been no experimental evidence this particle laboratories so far. Regarding observational constraints supermassive pulsars well gravitational waves, we encounter dilemma for which introduce solution by quark deconfinement fulfilling all present from multi-messenger astronomy, i.e., tidal deformability accordance with GW170817 and maximum mass above lower limit PSR J0740+6620.