arXiv:hep-ph/0212024·v2·High Energy Physics — Phenomenology
Incompressibility of strange matter
Monika Sinha (1,2)🇮🇳 · Manjari Bagchi (1,2)🇮🇳 · Jishnu Dey (2)🇮🇳 · Mira Dey (1) · Subharthi Ray (3) · Siddhartha Bhowmick (4) ((1) Dept. Physics, Presidency College, Kolkata, India (2) Dept. of Physics, Maulana Azad College, Kolkata, India (3) Inter University Centre for Astronomy and Astrophysics, Ganeshkhind, Pune, India (4) Dept. of Physics, Barasat Govt. College, Kolkata, India.)
Abstract
Strange stars calculated from a realistic equation of state (EOS), that incorporate chiral symmetry restoration as well as deconfinement at high density show compact objects in the mass radius curve. We compare our calculations of incompressibility for this EOS with that of nuclear matter. One of the nuclear matter EOS has a continuous transition to ud-matter at about five times normal density. Another nuclear matter EOS incorporates density dependent coupling constants. From a look at the consequent velocity of sound, it is found that the transition to ud-matter seems necessary.
Comments: Accepted for publication in Phys Lett B