Speaker
Mr
Davide De Boni
(Swansea University)
Description
At zero temperature nucleons and their parity partners have non-degenerate
masses due to spontaneous breaking of chiral symmetry.
However, chiral symmetry is expected to be restored at sufficiently high temperature,
in particular when going from the hadronic to the quark-gluon plasma (QGP) phase,
implying that the parity partners should become degenerate.
We study the nucleon (spin 1/2) and Delta (spin 3/2) baryons in both
parity sectors for a range of temperatures in the confined and QGP phases.
Using anisotropic $N_f = 2+1$ flavour simulations, we analyse the correlation functions and the spectral functions
using respectively exponential fits and the Maximum Entropy Method.
We find a clear sign of parity doubling for both baryons in the QGP phase:
the parity state masses become degenerate and
their corresponding correlators become essentially identical.
Primary author
Mr
Davide De Boni
(Swansea University)
Co-authors
Dr
Benjamin Jäger
(Swansea University)
Ms
Chrisanthi Praki
(Swansea University)
Prof.
Christopher Allton
(Swansea University)
Prof.
Gert Aarts
(Swansea University)
Dr
Jon-Ivar Skullerud
(Maynooth University)
Prof.
Simon Hands
(Swansea University)
