Speaker
Bikash Sinha
(Variable Energy Cyclotron Centre, Kolkata, India)
Description
It is entirely plausible, that a first order QCD phase transition under a reasonable condition occurred from quarks to hadrons when the universe was about a microsecond old. It is shown in this paper that the quark nuggets, possible relics of the first order QCD phase transitions with baryon number larger than $10^{43}$ will survive the entire history of the universe uptil now and can be considered as candidates for the cold dark matter. The spin down core of the neutron star on the high density low temperature end of the phase diagram initiates transition from hadrons to quarks. As the star spins down, the size of the core goes increasing. Recently discovered massive Pulsar PSRJ 1614-2230 with a mass of 1.97$\pm$0.04 $M_{\odot}$ most likely has a strongly repulsive interacting quark core. What possible observables can there be from these neutron stars? One of the central question we ask, the infant universe and the core of the neutron star, do they have properties of a perfect fluid?
Primary author
Bikash Sinha
(Variable Energy Cyclotron Centre, Kolkata, India)
