5 research outputs found
Hydrodynamics of a quark droplet II: Implications of a non-zero baryon chemical potential
We present an extended version of the dynamical model for a multi-quark
droplet evolution described in our proceeding paper. The model includes
collective expansion of the droplet, effects of the vacuum pressure and surface
tension, and now a non-zero baryon number. The hadron emission from the droplet
is described following Weisskopf's statistical model. We consider evolutions of
droplets with different initial temperatures and net baryon number. It is found
that the introduction of a non-zero net baryon number does not change the
lifetime of the droplets significantly. Only when we consider an initially very
baryon-rich, low-temperature droplets is the lifetime is decreased
significantly. We have, furthermore, found a convergence of both baryon
chemical potential and temperature toward the values 450
MeV and MeV. This convergence is linked to the competing
emission of baryons versus mesons.Comment: 15 pages, 5 figure
Hydrodynamics of a quark droplet
We present a simple model of a multi-quark droplet evolution based on the
hydrodynamical description. This model includes collective expansion of the
droplet, effects of the vacuum pressure and surface tension. The hadron
emission from the droplet is described following Weisskopf's statistical model.
We have considered evolution of baryon-free droplets which have different
initial temperatures and expansion rates. As a typical trend we observe an
oscillating behavior of the droplet radius superimposed with a gradual
shrinkage due to the hadron emission. The characteristic life time of droplets
with radii 1.5-2 fm are about 9-16 fm/c.Comment: 22 pages, 12 figure