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Dilaton potential and lattice data
Physical Review D, Volume: 101, Issue: 7
Swansea University Author: Maurizio Piai
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DOI (Published version): 10.1103/physrevd.101.075025
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...
Published in: | Physical Review D |
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ISSN: | 2470-0010 2470-0029 |
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American Physical Society (APS)
2020
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URI: | https://cronfa.swan.ac.uk/Record/cronfa53857 |
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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 https://creativecommons.org/licenses/by/4.0/ |
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 |
2020-04-15T04:07:02Z |
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1763753509983879168 |
score |
11.037122 |