Non-zero temperature study of spin 1/2 charmed baryons using lattice gauge theory

TL;DR

This study investigates how spin 1/2 charmed baryons behave at different temperatures using lattice QCD simulations, revealing significant temperature effects and insights into chiral symmetry restoration.

Contribution

It provides the first detailed analysis of temperature-dependent masses of spin 1/2 charmed baryons using anisotropic lattice QCD with dynamical flavours.

Findings

Temperature effects are significant in negative parity channels.

Some positive parity channels also show notable temperature dependence.

Estimated pseudocritical temperature indicates chiral symmetry restoration.

Abstract

We study the behaviour of spin $1/2$ charmed baryons as the temperature increases. We make use of anisotropic lattice QCD simulations with $N_f = 2 + 1$ dynamical flavours. After determining the positive and negative parity ground state masses at the lowest temperature, we investigate the effect of rising temperature using ratios of thermal lattice correlators with both so-called reconstructed correlators and with simple model correlators. This avoids difficulties associated with non-zero temperature fitting or spectral reconstruction. We find that temperature effects are prominent throughout the hadronic phase for all negative parity channels considered and for some positive parity channels. Subsequently and where possible, we determine the masses of the ground states as a function of temperature. Finally we consider the effect of chiral symmetry restoration and extract an estimate of the pseudocritical temperature from singly charmed baryonic correlators.