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Light baryons below and above the deconfinement transition: medium effects and parity doubling
,
Chris Allton ,
Davide De Boni,
Simon Hands,
Benjamin Jäger,
Chrisanthi Praki,
Jon-Ivar Skullerud
Journal of High Energy Physics, Volume: 2017, Issue: 6, Pages: 1 - 30
Swansea University Authors:
Gert Aarts , Chris Allton , Davide De Boni, Simon Hands
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DOI (Published version): 10.1007/jhep06(2017)034
Abstract
We study what happens to the N , Δ and Ω 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 Nf = 2 + 1 ensembles, with four tem...
| Published in: | Journal of High Energy Physics |
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| ISSN: | 1029-8479 |
| Published: |
Springer Science and Business Media LLC
2017
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa34210 |
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| Abstract: |
We study what happens to the N , Δ and Ω 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 Nf = 2 + 1 ensembles, with four temperatures below and four above the deconfinement transition temperature. Below Tc 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 Tc we find a clear signal of parity doubling in all three channels, with the effect of the heavier s quark visible. |
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| Keywords: |
Lattice Quantum Field Theory, Phase Diagram of QCD, Quark-Gluon Plasma, Thermal Field Theory |
| College: |
Faculty of Science and Engineering |
| Issue: |
6 |
| Start Page: |
1 |
| End Page: |
30 |