Conformal versus confining scenario in SU(2) with adjoint fermions

Debbio, L. Del; Lucini, B; Patella, A; Pica, C; Rago, A; Lucini, Biagio

doi:10.1103/PhysRevD.80.074507

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Conformal versus confining scenario in SU(2) with adjoint fermions

L. Del Debbio, B Lucini, A Patella, C Pica, A Rago, Biagio Lucini

Physical Review D, Volume: 80, Issue: 7

Swansea University Author: Biagio Lucini

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DOI (Published version): 10.1103/PhysRevD.80.074507

Abstract

The masses of the lowest-lying states in the meson and in the gluonic sector of an SU(2) gauge theory with two Dirac flavors in the adjoint representation are measured on the lattice at a fixed value of the lattice coupling β=4/g...

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Published in:	Physical Review D
ISSN:	1550-7998 1550-2368
Published:	2009
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa1137
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last_indexed	2018-02-09T04:28:06Z
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spelling	2013-11-01T14:52:03.8255556 v2 1137 2012-02-23 Conformal versus confining scenario in SU(2) with adjoint fermions 7e6fcfe060e07a351090e2a8aba363cf 0000-0001-8974-8266 Biagio Lucini Biagio Lucini true false 2012-02-23 SMA <p>The masses of the lowest-lying states in the meson and in the gluonic sector of an SU(2) gauge theory with two Dirac flavors in the adjoint representation are measured on the lattice at a fixed value of the lattice coupling <span><span>β</span>=4/<span>g</span><sub>0</sub><sup>2</sup>=2.25</span> for values of the bare fermion mass <span><span>m</span><sub>0</sub></span> that span a range between the quenched regime and the massless limit, and for various lattice volumes. Even for light constituent fermions the lightest glueballs are found to be lighter than the lightest mesons. Moreover, the string tension between two static fundamental sources strongly depends on the mass of the dynamical fermions and becomes of the order of the inverse squared lattice linear size before the chiral limit is reached. The implications of these findings for the phase of the theory in the massless limit are discussed and a strategy for discriminating between the (near-)conformal and the confining scenario is outlined.</p> Journal Article Physical Review D 80 7 1550-7998 1550-2368 31 12 2009 2009-12-31 10.1103/PhysRevD.80.074507 COLLEGE NANME Mathematics COLLEGE CODE SMA Swansea University 2013-11-01T14:52:03.8255556 2012-02-23T17:02:06.0000000 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics L. Del Debbio 1 B Lucini 2 A Patella 3 C Pica 4 A Rago 5 Biagio Lucini 0000-0001-8974-8266 6
title	Conformal versus confining scenario in SU(2) with adjoint fermions
spellingShingle	Conformal versus confining scenario in SU(2) with adjoint fermions Biagio Lucini
title_short	Conformal versus confining scenario in SU(2) with adjoint fermions
title_full	Conformal versus confining scenario in SU(2) with adjoint fermions
title_fullStr	Conformal versus confining scenario in SU(2) with adjoint fermions
title_full_unstemmed	Conformal versus confining scenario in SU(2) with adjoint fermions
title_sort	Conformal versus confining scenario in SU(2) with adjoint fermions
author_id_str_mv	7e6fcfe060e07a351090e2a8aba363cf
author_id_fullname_str_mv	7e6fcfe060e07a351090e2a8aba363cf_***_Biagio Lucini
author	Biagio Lucini
author2	L. Del Debbio B Lucini A Patella C Pica A Rago Biagio Lucini
format	Journal article
container_title	Physical Review D
container_volume	80
container_issue	7
publishDate	2009
institution	Swansea University
issn	1550-7998 1550-2368
doi_str_mv	10.1103/PhysRevD.80.074507
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	<p>The masses of the lowest-lying states in the meson and in the gluonic sector of an SU(2) gauge theory with two Dirac flavors in the adjoint representation are measured on the lattice at a fixed value of the lattice coupling <span><span>β</span>=4/<span>g</span><sub>0</sub><sup>2</sup>=2.25</span> for values of the bare fermion mass <span><span>m</span><sub>0</sub></span> that span a range between the quenched regime and the massless limit, and for various lattice volumes. Even for light constituent fermions the lightest glueballs are found to be lighter than the lightest mesons. Moreover, the string tension between two static fundamental sources strongly depends on the mass of the dynamical fermions and becomes of the order of the inverse squared lattice linear size before the chiral limit is reached. The implications of these findings for the phase of the theory in the massless limit are discussed and a strategy for discriminating between the (near-)conformal and the confining scenario is outlined.</p>
published_date	2009-12-31T03:02:50Z
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score	11.036706

Conformal versus confining scenario in SU(2) with adjoint fermions

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