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

作者：Gert Aarts, Chris Allton, Muhammad Naeem Anwar, Ryan Bignell, Timothy J. Burns, Benjamin Jäger, Jon-Ivar Skullerud · 发表于：The European Physical Journal A · 年份：2024 · DOI：10.1140/epja/s10050-024-01261-2 · 被引用次数：9 · 研究领域：High-Energy Particle Collisions Research、Quantum Chromodynamics and Particle Interactions、Particle physics theoretical and experimental studies

Abstract We study the behaviour of spin 1/2 charmed baryons as the temperature increases. We make use of anisotropic lattice QCD simulations with $$N_f = 2 + 1$$ 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.