期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP06(2017)034
关键词
Lattice Quantum Field Theory; Phase Diagram of QCD; Quark-Gluon Plasma; Thermal Field Theory
资金
- STFC [ST/L000369/1]
- SNF [200020-162515]
- ICHEC
- Royal Society
- Wolfson Foundation
- Leverhulme Trust
- BIS National E-infrastructure capital [ST/K000411/1]
- STFC capital [ST/H008845/1]
- STFC DiRAC Operations [ST/K005804/1, ST/K005790/1]
- STFC [ST/P00055X/1, ST/L000369/1] Funding Source: UKRI
- Science and Technology Facilities Council [1168096, ST/L000369/1, ST/P00055X/1] Funding Source: researchfish
We study what happens to the N, Delta and Omega baryons in the hadronic gas and the quark-gluon plasma, with particular interest in parity doubling and its emergence as the plasma is heated. This is done using simulations of lattice QCD, employing the FASTSUM anisotropic N (f) = 2 + 1 ensembles, with four temperatures below and four above the deconfinement transition temperature. Below T-c we find that the positive-parity groundstate masses are largely temperature independent, whereas the negative-parity ones are reduced considerably as the temperature increases. This may be of interest for heavy-ion phenomenology. Close to the transition, the masses are nearly degenerate, in line with the expectation from chiral symmetry restoration. Above T-c we find a clear signal of parity doubling in all three channels, with the effect of the heavier squark visible.
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