Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions

Bennett, Ed; Hong, Deog Ki; Lee, Jong-Wan; Lin, C.-J. David; Lucini, Biagio; Piai, Maurizio; Vadacchino, Davide

doi:10.1007/jhep12(2019)053

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Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions

Ed Bennett

, Deog Ki Hong, Jong-Wan Lee, C.-J. David Lin, Biagio Lucini

, Maurizio Piai

, Davide Vadacchino

Journal of High Energy Physics, Volume: 2019, Issue: 12

Swansea University Authors: Ed Bennett , Biagio Lucini , Maurizio Piai

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DOI (Published version): 10.1007/jhep12(2019)053

Abstract

We perform lattice studies of the gauge theory with Sp(4) gauge group and two flavours of (Dirac) fundamental matter. The global SU(4) symmetry is spontaneously broken by the fermion condensate. The dynamical Wilson fermions in the lattice action introduce a mass that breaks the global symmetry also...

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Published in:	Journal of High Energy Physics
ISSN:	1029-8479
Published:	Springer Science and Business Media LLC 2019
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URI:	https://cronfa.swan.ac.uk/Record/cronfa52872
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first_indexed	2019-11-26T04:13:46Z
last_indexed	2020-12-15T04:14:53Z
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The global SU(4) symmetry is spontaneously broken by the fermion condensate. The dynamical Wilson fermions in the lattice action introduce a mass that breaks the global symmetry also explicitly. The resulting pseudo-Nambu-Goldstone bosons describe the SU(4)/Sp(4) coset, and are relevant, in the context of physics beyond the Standard Model, for composite Higgs models. We discuss scale setting, continuum extrapolation and finite volume effects in the lattice theory. We study mesonic composite states, which span representations of the unbroken Sp(4) global symmetry, and we measure masses and decay constants of the (flavoured) spin-0 and spin-1 states accessible to the numerical treatment, as a function of the fermion mass. With help from the effective field theory treatment of such mesons, we perform a first extrapolation towards the massless limit. We assess our results by critically comparing to the literature on other models and to the quenched results, and we conclude by outlining future avenues for further exploration. 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spelling	2020-12-14T16:25:45.4570990 v2 52872 2019-11-25 Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions e1a8e7927d2b093acdc54e74eac95e38 0000-0002-1678-6701 Ed Bennett Ed Bennett true false 7e6fcfe060e07a351090e2a8aba363cf 0000-0001-8974-8266 Biagio Lucini Biagio Lucini true false 3ce295f2c7cc318bac7da18f9989d8c3 0000-0002-2251-0111 Maurizio Piai Maurizio Piai true false 2019-11-25 SMA We perform lattice studies of the gauge theory with Sp(4) gauge group and two flavours of (Dirac) fundamental matter. The global SU(4) symmetry is spontaneously broken by the fermion condensate. The dynamical Wilson fermions in the lattice action introduce a mass that breaks the global symmetry also explicitly. The resulting pseudo-Nambu-Goldstone bosons describe the SU(4)/Sp(4) coset, and are relevant, in the context of physics beyond the Standard Model, for composite Higgs models. We discuss scale setting, continuum extrapolation and finite volume effects in the lattice theory. We study mesonic composite states, which span representations of the unbroken Sp(4) global symmetry, and we measure masses and decay constants of the (flavoured) spin-0 and spin-1 states accessible to the numerical treatment, as a function of the fermion mass. With help from the effective field theory treatment of such mesons, we perform a first extrapolation towards the massless limit. We assess our results by critically comparing to the literature on other models and to the quenched results, and we conclude by outlining future avenues for further exploration. The results of our spectroscopic analysis provide new input data for future phenomenological studies in the contexts of composite Higgs models, and of dark matter models with a strongly coupled dynamical origin. Journal Article Journal of High Energy Physics 2019 12 Springer Science and Business Media LLC 1029-8479 Lattice quantum field theory, technicolor and composite models, beyond standard model 5 12 2019 2019-12-05 10.1007/jhep12(2019)053 COLLEGE NANME Mathematics COLLEGE CODE SMA Swansea University UKRI, EC, Royal Society, ERDF, National Research Foundation of Korea, Ministry of Education of Korea, Ministry of Science of Korea, MoST (Taiwan) 2020-12-14T16:25:45.4570990 2019-11-25T19:47:16.6930402 Professional Services ISS - Uncategorised Ed Bennett 0000-0002-1678-6701 1 Deog Ki Hong 2 Jong-Wan Lee 3 C.-J. David Lin 4 Biagio Lucini 0000-0001-8974-8266 5 Maurizio Piai 0000-0002-2251-0111 6 Davide Vadacchino 7 52872__16148__5b2084042c39436d968be5e14911aa71.pdf Bennett2019_Article_Sp4GaugeTheoriesOnTheLatticeNf.pdf 2019-12-18T23:36:44.4196538 Output 1614917 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution License (CC-BY). true eng https://creativecommons.org/licenses/by/4.0/ 6 true true
title	Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions
spellingShingle	Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions Ed Bennett Biagio Lucini Maurizio Piai
title_short	Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions
title_full	Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions
title_fullStr	Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions
title_full_unstemmed	Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions
title_sort	Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions
author_id_str_mv	e1a8e7927d2b093acdc54e74eac95e38 7e6fcfe060e07a351090e2a8aba363cf 3ce295f2c7cc318bac7da18f9989d8c3
author_id_fullname_str_mv	e1a8e7927d2b093acdc54e74eac95e38_*_Ed Bennett 7e6fcfe060e07a351090e2a8aba363cf__Biagio Lucini 3ce295f2c7cc318bac7da18f9989d8c3_**_Maurizio Piai
author	Ed Bennett Biagio Lucini Maurizio Piai
author2	Ed Bennett Deog Ki Hong Jong-Wan Lee C.-J. David Lin Biagio Lucini Maurizio Piai Davide Vadacchino
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container_title	Journal of High Energy Physics
container_volume	2019
container_issue	12
publishDate	2019
institution	Swansea University
issn	1029-8479
doi_str_mv	10.1007/jhep12(2019)053
publisher	Springer Science and Business Media LLC
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description	We perform lattice studies of the gauge theory with Sp(4) gauge group and two flavours of (Dirac) fundamental matter. The global SU(4) symmetry is spontaneously broken by the fermion condensate. The dynamical Wilson fermions in the lattice action introduce a mass that breaks the global symmetry also explicitly. The resulting pseudo-Nambu-Goldstone bosons describe the SU(4)/Sp(4) coset, and are relevant, in the context of physics beyond the Standard Model, for composite Higgs models. We discuss scale setting, continuum extrapolation and finite volume effects in the lattice theory. We study mesonic composite states, which span representations of the unbroken Sp(4) global symmetry, and we measure masses and decay constants of the (flavoured) spin-0 and spin-1 states accessible to the numerical treatment, as a function of the fermion mass. With help from the effective field theory treatment of such mesons, we perform a first extrapolation towards the massless limit. We assess our results by critically comparing to the literature on other models and to the quenched results, and we conclude by outlining future avenues for further exploration. The results of our spectroscopic analysis provide new input data for future phenomenological studies in the contexts of composite Higgs models, and of dark matter models with a strongly coupled dynamical origin.
published_date	2019-12-05T04:05:30Z
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score	11.012924

Sp (4) gauge theories on the lattice: Nf = 2 dynamical fundamental fermions

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