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Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks

Enrico Rinaldi, Antonio Rago, Agostino Patella, Biagio Lucini Orcid Logo

Journal of High Energy Physics, Volume: "1311", Issue: 11, Start page: 106

Swansea University Author: Biagio Lucini Orcid Logo

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DOI (Published version): 10.1007/JHEP11(2013)106

Abstract

The lattice phase structure of a gauge theory can be a serious obstruction to Monte Carlo studies of its continuum behaviour. This issue is particularly delicate when numerical studies are performed to determine whether a theory is in a (near-)conformal phase. In this work we investigate the heavy m...

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Published in: Journal of High Energy Physics
ISSN: 1029-8479
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa27914
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first_indexed 2016-05-15T01:22:46Z
last_indexed 2018-02-09T05:11:28Z
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spelling 2016-05-14T16:42:00.6530188 v2 27914 2016-05-14 Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks 7e6fcfe060e07a351090e2a8aba363cf 0000-0001-8974-8266 Biagio Lucini Biagio Lucini true false 2016-05-14 SMA The lattice phase structure of a gauge theory can be a serious obstruction to Monte Carlo studies of its continuum behaviour. This issue is particularly delicate when numerical studies are performed to determine whether a theory is in a (near-)conformal phase. In this work we investigate the heavy mass limit of the SU(2) gauge theory with Nf=2 adjoint fermions and its lattice phase diagram, showing the presence of a critical point ending a line of first order bulk phase transition. The relevant gauge observables and the low-lying spectrum are monitored in the vicinity of the critical point with very good control over different systematic effects. The scaling properties of masses and susceptibilities open the possibility that the effective theory at criticality is a scalar theory in the universality class of the four-dimensional Gaussian model. This behaviour is clearly different from what is observed for SU(2) gauge theory with two dynamical adjoint fermions, whose (near-)conformal numerical signature is hence free from strong-coupling bulk effects. Journal Article Journal of High Energy Physics "1311" 11 106 1029-8479 30 9 2013 2013-09-30 10.1007/JHEP11(2013)106 http://inspirehep.net/record/1253118 COLLEGE NANME Mathematics COLLEGE CODE SMA Swansea University 2016-05-14T16:42:00.6530188 2016-05-14T16:42:00.4190173 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Enrico Rinaldi 1 Antonio Rago 2 Agostino Patella 3 Biagio Lucini 0000-0001-8974-8266 4
title Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks
spellingShingle Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks
Biagio Lucini
title_short Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks
title_full Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks
title_fullStr Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks
title_full_unstemmed Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks
title_sort Infrared conformality and bulk critical points: SU(2) with heavy adjoint quarks
author_id_str_mv 7e6fcfe060e07a351090e2a8aba363cf
author_id_fullname_str_mv 7e6fcfe060e07a351090e2a8aba363cf_***_Biagio Lucini
author Biagio Lucini
author2 Enrico Rinaldi
Antonio Rago
Agostino Patella
Biagio Lucini
format Journal article
container_title Journal of High Energy Physics
container_volume "1311"
container_issue 11
container_start_page 106
publishDate 2013
institution Swansea University
issn 1029-8479
doi_str_mv 10.1007/JHEP11(2013)106
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
url http://inspirehep.net/record/1253118
document_store_str 0
active_str 0
description The lattice phase structure of a gauge theory can be a serious obstruction to Monte Carlo studies of its continuum behaviour. This issue is particularly delicate when numerical studies are performed to determine whether a theory is in a (near-)conformal phase. In this work we investigate the heavy mass limit of the SU(2) gauge theory with Nf=2 adjoint fermions and its lattice phase diagram, showing the presence of a critical point ending a line of first order bulk phase transition. The relevant gauge observables and the low-lying spectrum are monitored in the vicinity of the critical point with very good control over different systematic effects. The scaling properties of masses and susceptibilities open the possibility that the effective theory at criticality is a scalar theory in the universality class of the four-dimensional Gaussian model. This behaviour is clearly different from what is observed for SU(2) gauge theory with two dynamical adjoint fermions, whose (near-)conformal numerical signature is hence free from strong-coupling bulk effects.
published_date 2013-09-30T03:33:53Z
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score 11.013619

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