28 August 2016 to 4 September 2016
Europe/Athens timezone

Parity doubling of nucleons and Delta baryons across the deconfinement phase transition

30 Aug 2016, 16:20
20m
Amfitrion II (Makedonia Palace)

Amfitrion II

Makedonia Palace

Section D: Deconfinement Section D

Speaker

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

Davide De Boni (Swansea University)

Co-authors

Benjamin Jäger (Swansea University) Chris Allton (Swansea University) Ms Chrisanthi Praki (Swansea University) Gert Aarts (Swansea University) Jon-Ivar Skullerud (National University of Ireland Maynooth) Simon Hands (Swansea University)

Presentation materials