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Medium effects and parity doubling of hyperons across the deconfinement phase transition

Gert Aarts Orcid Logo, Chris Allton, Davide De Boni, Simon Hands, Benjamin Jäger, Chrisanthi Praki, Jon-Ivar Skullerud

EPJ Web of Conferences, Volume: 175, Start page: 07016

Swansea University Author: Gert Aarts Orcid Logo

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DOI (Published version): 10.1051/epjconf/201817507016

Abstract

We analyse the behaviour of hyperons with strangeness S=−1,−2,−3 in the hadronic and quark gluon plasma phases, with particular interest in parity doubling and its emergence as the temperature grows. This study uses our FASTSUM anisotropic Nf=2+1 ensembles, with four temperatures below and four abov...

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Published in: EPJ Web of Conferences
ISSN: 2100-014X
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa37989
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first_indexed 2018-01-10T14:12:57Z
last_indexed 2018-04-19T13:37:16Z
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spelling 2018-04-19T10:45:22.2700331 v2 37989 2018-01-10 Medium effects and parity doubling of hyperons across the deconfinement phase transition 1ba0dad382dfe18348ec32fc65f3f3de 0000-0002-6038-3782 Gert Aarts Gert Aarts true false 2018-01-10 SPH We analyse the behaviour of hyperons with strangeness S=−1,−2,−3 in the hadronic and quark gluon plasma phases, with particular interest in parity doubling and its emergence as the temperature grows. This study uses our FASTSUM anisotropic Nf=2+1 ensembles, with four temperatures below and four above the deconfinement transition temperature, Tc. The positive-parity groundstate masses are found to be largely temperature independent below Tc, whereas the negative-parity ones decrease considerably as the temperature increases. Close to the transition, the masses are almost degenerate, in line with the expectation from chiral symmetry restoration. This may be of interest for heavy-ion phenomenology. In particular we show an application of this effect to the Hadron Resonance Gas model. A clear signal of parity doubling is found above Tc in all hyperon channels, with the strength of the effect depending on the number of s-quarks in the baryons. Journal Article EPJ Web of Conferences 175 07016 2100-014X 26 3 2018 2018-03-26 10.1051/epjconf/201817507016 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2018-04-19T10:45:22.2700331 2018-01-10T11:05:06.0336168 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Gert Aarts 0000-0002-6038-3782 1 Chris Allton 2 Davide De Boni 3 Simon Hands 4 Benjamin Jäger 5 Chrisanthi Praki 6 Jon-Ivar Skullerud 7 0037989-11042018095417.pdf epjconf_lattice2018_07016.pdf 2018-04-11T09:54:17.9930000 Output 262569 application/pdf Version of Record true 2018-04-19T00:00:00.0000000 Released under the terms of a Creative Commons Attribution License 4.0 (CC-BY). true eng
title Medium effects and parity doubling of hyperons across the deconfinement phase transition
spellingShingle Medium effects and parity doubling of hyperons across the deconfinement phase transition
Gert Aarts
title_short Medium effects and parity doubling of hyperons across the deconfinement phase transition
title_full Medium effects and parity doubling of hyperons across the deconfinement phase transition
title_fullStr Medium effects and parity doubling of hyperons across the deconfinement phase transition
title_full_unstemmed Medium effects and parity doubling of hyperons across the deconfinement phase transition
title_sort Medium effects and parity doubling of hyperons across the deconfinement phase transition
author_id_str_mv 1ba0dad382dfe18348ec32fc65f3f3de
author_id_fullname_str_mv 1ba0dad382dfe18348ec32fc65f3f3de_***_Gert Aarts
author Gert Aarts
author2 Gert Aarts
Chris Allton
Davide De Boni
Simon Hands
Benjamin Jäger
Chrisanthi Praki
Jon-Ivar Skullerud
format Journal article
container_title EPJ Web of Conferences
container_volume 175
container_start_page 07016
publishDate 2018
institution Swansea University
issn 2100-014X
doi_str_mv 10.1051/epjconf/201817507016
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 1
active_str 0
description We analyse the behaviour of hyperons with strangeness S=−1,−2,−3 in the hadronic and quark gluon plasma phases, with particular interest in parity doubling and its emergence as the temperature grows. This study uses our FASTSUM anisotropic Nf=2+1 ensembles, with four temperatures below and four above the deconfinement transition temperature, Tc. The positive-parity groundstate masses are found to be largely temperature independent below Tc, whereas the negative-parity ones decrease considerably as the temperature increases. Close to the transition, the masses are almost degenerate, in line with the expectation from chiral symmetry restoration. This may be of interest for heavy-ion phenomenology. In particular we show an application of this effect to the Hadron Resonance Gas model. A clear signal of parity doubling is found above Tc in all hyperon channels, with the strength of the effect depending on the number of s-quarks in the baryons.
published_date 2018-03-26T03:47:58Z
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score 11.037144

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