[Jlab-seminars] Theory Center Seminar (Room Change)

[Mary Fox]

Theory Center Seminar
Tuesday, June 8, 2010
12:30 p.m.
CEBAF Center, Room A110 (Room Change)

QMC as a Model of Dense Matter: From Finite Nuclei to Hybrid Stars

Jonathan Carroll
University of Adelaide, Australia

The QCD phase diagram at mu > 0, T \ge 0 is largely unknown and
particularly inaccessible to even lattice QCD simulations. One method
for investigating the mu >> 0 region is effective field theory using
mean-field meson potentials.

The EMC effect indicates that the quark structure of the nucleon is
modified in an essential way in a nuclear medium, and the Quark-Meson
Coupling (QMC) model provides a simple yet very successful description
of meson-baryon interactions with feedback to the quark structure of the
baryons.

With QMC predictions for finite nuclei -- and, in particular, finite
hypernuclei -- proving accurate, our attention turns to the equation of
state of dense matter and the structure of 'hybrid stars'; neutron stars
with proportions of hyperonic- or quark-matter. Using such an equation
of state as an input to the Tolman-Oppenheimer-Volkoff equation allows
us to construct models of stars and compare predicted mass and radius
with pulsar observations.

I will discuss the origins and predictions of QMC ranging from finite
nuclei to hybrid stars and our recent progress in extending this model
beyond the mean-field approximation to Hartree--Fock.

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A complete list of upcoming theory seminars and talks from previous
seminars are available from:
http://www.jlab.org/~thomasc/seminars/index.html

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