Quarkyonic Matter and Neutron Stars

McLerran, Larry; Reddy, Sanjay

doi:10.1103/PhysRevLett.122.122701

Quarkyonic Matter and Neutron Stars

Nov 29, 2018

5 pages

Published in:

Phys.Rev.Lett. 122 (2019) 12, 122701

Published: Mar 27, 2019

e-Print:

1811.12503 [nucl-th]

DOI:

10.1103/PhysRevLett.122.122701

Report number:

INT-PUB-18-060

View in:

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Abstract: (APS)

We consider quarkyonic matter to naturally explain the observed properties of neutron stars. We argue that such matter might exist at densities close to that of nuclear matter, and at the onset, the pressure and the sound velocity in quarkyonic matter increase rapidly. In the limit of large number of quark colors Nc, this transition is characterized by a discontinuous change in pressure as a function of baryon number density. We make a simple model of quarkyonic matter and show that generically the sound velocity is a nonmonotonic function of density—it reaches a maximum at relatively low density, decreases, and then increases again to its asymptotic value of 1/3.

Note:

5 pages, 4 figures

Nuclear Physics
velocity: acoustic
baryon number: density
density: high
quark: color
neutron star: mass
pressure
nuclear matter: equation of state
isospin: asymmetry
potential: chemical

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