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Dilaton potential and lattice data / Thomas Appelquist; James Ingoldby; Maurizio Piai

Physical Review D, Volume: 101, Issue: 7

Swansea University Author: Maurizio, Piai

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Abstract

We study an effective field theory (EFT) describing the interaction of an approximate dilaton with a set of pseudo-Nambu-Goldstone bosons (pNGBs). The EFT is inspired by, and employed to analyse, recent results from lattice calculations that reveal the presence of a remarkably light singlet scalar p...

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Published in: Physical Review D
ISSN: 2470-0010 2470-0029
Published: American Physical Society (APS) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa53857
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spelling 2020-07-06T17:59:50.3864234 v2 53857 2020-03-25 Dilaton potential and lattice data 3ce295f2c7cc318bac7da18f9989d8c3 0000-0002-2251-0111 Maurizio Piai Maurizio Piai true false 2020-03-25 SPH We study an effective field theory (EFT) describing the interaction of an approximate dilaton with a set of pseudo-Nambu-Goldstone bosons (pNGBs). The EFT is inspired by, and employed to analyse, recent results from lattice calculations that reveal the presence of a remarkably light singlet scalar particle. We adopt a simple form for the scalar potential for the EFT, which interpolates among earlier proposals. It describes departures from conformal symmetry, by the insertion of a single operator at leading order in the EFT. To fit the lattice results, the global internal symmetryis explicitly broken, producing a common mass for the pNGBs, as well as a further, additive deformation of the scalar potential. We discuss sub-leading corrections arising in the EFT from quantum loops. From lattice measurements of the scalar and pNGB masses and of the pNGB decay constant, we extract model parameter values, including those that characterise the scalar potential.The result includes the possibility that the conformal deformation is clearly non-marginal. The extrapolated values for the decay constants and the scalar mass would then be not far below thecurrent lattice-determined values. Journal Article Physical Review D 101 7 American Physical Society (APS) 2470-0010 2470-0029 15 4 2020 2020-04-15 10.1103/physrevd.101.075025 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2020-07-06T17:59:50.3864234 2020-03-25T08:45:28.7966636 Thomas Appelquist 1 James Ingoldby 2 Maurizio Piai 0000-0002-2251-0111 3 53857__17653__dc17682db7814612914aab86d6e8d291.pdf 53857.pdf 2020-07-06T17:48:03.5331687 Output 1170010 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution 4.0 International license (CC-BY). true eng
title Dilaton potential and lattice data
spellingShingle Dilaton potential and lattice data
Maurizio, Piai
title_short Dilaton potential and lattice data
title_full Dilaton potential and lattice data
title_fullStr Dilaton potential and lattice data
title_full_unstemmed Dilaton potential and lattice data
title_sort Dilaton potential and lattice data
author_id_str_mv 3ce295f2c7cc318bac7da18f9989d8c3
author_id_fullname_str_mv 3ce295f2c7cc318bac7da18f9989d8c3_***_Maurizio, Piai
author Maurizio, Piai
author2 Thomas Appelquist
James Ingoldby
Maurizio Piai
format Journal article
container_title Physical Review D
container_volume 101
container_issue 7
publishDate 2020
institution Swansea University
issn 2470-0010
2470-0029
doi_str_mv 10.1103/physrevd.101.075025
publisher American Physical Society (APS)
document_store_str 1
active_str 0
description We study an effective field theory (EFT) describing the interaction of an approximate dilaton with a set of pseudo-Nambu-Goldstone bosons (pNGBs). The EFT is inspired by, and employed to analyse, recent results from lattice calculations that reveal the presence of a remarkably light singlet scalar particle. We adopt a simple form for the scalar potential for the EFT, which interpolates among earlier proposals. It describes departures from conformal symmetry, by the insertion of a single operator at leading order in the EFT. To fit the lattice results, the global internal symmetryis explicitly broken, producing a common mass for the pNGBs, as well as a further, additive deformation of the scalar potential. We discuss sub-leading corrections arising in the EFT from quantum loops. From lattice measurements of the scalar and pNGB masses and of the pNGB decay constant, we extract model parameter values, including those that characterise the scalar potential.The result includes the possibility that the conformal deformation is clearly non-marginal. The extrapolated values for the decay constants and the scalar mass would then be not far below thecurrent lattice-determined values.
published_date 2020-04-15T04:18:10Z
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