Speaker
Dr
Paolo Finelli
(Department of Physics, University of Bologna)
Description
Background: An accurate description of nuclear pairing gaps is extremely important
for understanding static and dynamic properties of the inner crusts of neutron stars
and to explain their cooling process.
Purpose: We plan to study the behaviour of the pairing gaps as a function of
the Fermi momentum for neutron and nuclear matter in all relevant angular momentum
channels where superfluidity is believed to naturally emerge. The calculations
will employ realistic chiral nucleon-nucleon potentials
with the inclusion of three-body forces and self-energy effects.
Method: The superfluid states of neutron and nuclear matter are studied by solving the BCS gap
equation for chiral nuclear potentials using the method suggested by
Khodel, where the original gap equation
is replaced by a coupled set of equations for the dimensionless gap function and a non-linear
algebraic equation for the gap magnitude at the Fermi surface.
Results: We have successfully applied Khodel's method to singlet (S) and coupled channel
(SD and PF) cases in neutron and nuclear matter. Our calculations nicely agree with
other ab-initio approaches, where available, and provide crucial inputs for
applications in superfluid systems, i.e. the cooling process
of Cassiopeia A.
Primary author
Dr
Paolo Finelli
(Department of Physics, University of Bologna)
Co-authors
Dr
Jeremy W. Holt
(Department of Physics, University of Washington, Seattle)
Mr
Stefano Maurizio
(Department of Physics, University of Bologna)
