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Infrared dynamics of minimal walking technicolor

Luigi Del Debbio, Biagio Lucini Orcid Logo, Agostino Patella, Claudio Pica, Antonio Rago

Physical Review D, Volume: 82, Issue: 1, Start page: 014510

Swansea University Author: Biagio Lucini Orcid Logo

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DOI (Published version): 10.1103/PhysRevD.82.014510

Abstract

We study the gauge sector of minimal walking technicolor, which is an SU(2) gauge theory with nf=2 flavors of Wilson fermions in the adjoint representation. Numerical simulations are performed on lattices Nt×Ns3, with Ns ranging from 8 to 16 and Nt=2Ns, at fixed β=2.25, and varying the fermion bare...

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Published in: Physical Review D
ISSN: 1550-7998 1550-2368
Published: 2010
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URI: https://cronfa.swan.ac.uk/Record/cronfa1138
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spelling 2015-06-17T20:29:32.3564632 v2 1138 2012-02-23 Infrared dynamics of minimal walking technicolor 7e6fcfe060e07a351090e2a8aba363cf 0000-0001-8974-8266 Biagio Lucini Biagio Lucini true false 2012-02-23 SMA We study the gauge sector of minimal walking technicolor, which is an SU(2) gauge theory with nf=2 flavors of Wilson fermions in the adjoint representation. Numerical simulations are performed on lattices Nt×Ns3, with Ns ranging from 8 to 16 and Nt=2Ns, at fixed β=2.25, and varying the fermion bare mass m0, so that our numerical results cover the full range of fermion masses from the quenched region to the chiral limit. We present results for the string tension and the glueball spectrum. A comparison of mesonic and gluonic observables leads to the conclusion that the infrared dynamics is given by an SU(2) pure Yang-Mills theory with a typical energy scale for the spectrum sliding to zero with the fermion mass. The typical mesonic mass scale is proportional to and much larger than this gluonic scale. Our findings are compatible with a scenario in which the massless theory is conformal in the infrared. An analysis of the scaling of the string tension with the fermion mass toward the massless limit allows us to extract the chiral condensate anomalous dimension γ*, which is found to be γ*=0.22±0.06. Journal Article Physical Review D 82 1 014510 1550-7998 1550-2368 31 12 2010 2010-12-31 10.1103/PhysRevD.82.014510 COLLEGE NANME Mathematics COLLEGE CODE SMA Swansea University 2015-06-17T20:29:32.3564632 2012-02-23T17:02:06.0000000 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Luigi Del Debbio 1 Biagio Lucini 0000-0001-8974-8266 2 Agostino Patella 3 Claudio Pica 4 Antonio Rago 5
title Infrared dynamics of minimal walking technicolor
spellingShingle Infrared dynamics of minimal walking technicolor
Biagio Lucini
title_short Infrared dynamics of minimal walking technicolor
title_full Infrared dynamics of minimal walking technicolor
title_fullStr Infrared dynamics of minimal walking technicolor
title_full_unstemmed Infrared dynamics of minimal walking technicolor
title_sort Infrared dynamics of minimal walking technicolor
author_id_str_mv 7e6fcfe060e07a351090e2a8aba363cf
author_id_fullname_str_mv 7e6fcfe060e07a351090e2a8aba363cf_***_Biagio Lucini
author Biagio Lucini
author2 Luigi Del Debbio
Biagio Lucini
Agostino Patella
Claudio Pica
Antonio Rago
format Journal article
container_title Physical Review D
container_volume 82
container_issue 1
container_start_page 014510
publishDate 2010
institution Swansea University
issn 1550-7998
1550-2368
doi_str_mv 10.1103/PhysRevD.82.014510
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 0
active_str 0
description We study the gauge sector of minimal walking technicolor, which is an SU(2) gauge theory with nf=2 flavors of Wilson fermions in the adjoint representation. Numerical simulations are performed on lattices Nt×Ns3, with Ns ranging from 8 to 16 and Nt=2Ns, at fixed β=2.25, and varying the fermion bare mass m0, so that our numerical results cover the full range of fermion masses from the quenched region to the chiral limit. We present results for the string tension and the glueball spectrum. A comparison of mesonic and gluonic observables leads to the conclusion that the infrared dynamics is given by an SU(2) pure Yang-Mills theory with a typical energy scale for the spectrum sliding to zero with the fermion mass. The typical mesonic mass scale is proportional to and much larger than this gluonic scale. Our findings are compatible with a scenario in which the massless theory is conformal in the infrared. An analysis of the scaling of the string tension with the fermion mass toward the massless limit allows us to extract the chiral condensate anomalous dimension γ*, which is found to be γ*=0.22±0.06.
published_date 2010-12-31T03:02:51Z
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score 11.012678

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