Journal article 88 views 25 downloads
Meson spectroscopy from spectral densities in lattice gauge theories
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Luigi Del Debbio ,
Niccolo Forzano,
Ryan C. Hill,
Deog Ki Hong ,
Ho Hsiao ,
Jong-Wan Lee ,
C.-J. David Lin ,
Biagio Lucini ,
Alessandro Lupo ,
Maurizio Piai ,
Davide Vadacchino ,
Fabian Zierler
Physical Review D, Volume: 110, Issue: 7
Swansea University Authors:
Ed Bennett , Niccolo Forzano, Biagio Lucini , Maurizio Piai , Fabian Zierler
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DOI (Published version): 10.1103/physrevd.110.074509
Abstract
Spectral densities encode non-perturbative information that enters the calculation of a plethora of physical observables in strongly coupled field theories. Phenomenological applications encompass aspects of standard-model hadronic physics, observable at current colliders, as well as correlation fun...
| Published in: | Physical Review D |
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| ISSN: | 2470-0010 2470-0029 |
| Published: |
American Physical Society (APS)
2024
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa67647 |
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| Abstract: |
Spectral densities encode non-perturbative information that enters the calculation of a plethora of physical observables in strongly coupled field theories. Phenomenological applications encompass aspects of standard-model hadronic physics, observable at current colliders, as well as correlation functions characterizing new physics proposals, testable in future experiments. By making use of numerical data produced in a Sp(4) lattice gauge theory with matter transforming in an admixture of fundamental and 2-index antisymmetric representations of the gauge group, we perform a systematic study to demonstrate the effectiveness of recent technological progress in the reconstruction of spectral densities. To this purpose, we write and test new software packages that use energy-smeared spectral den- sities to analyze the mass spectrum of mesons. We assess the effectiveness of different smearing kernels and optimize the smearing parameters to the characteristics of available lattice ensembles. We generate new ensembles for the theory in consideration, with lattices that have a longer extent in the time direction with respect to the spatial ones. We run our tests on these ensembles, obtain- ing new results about the spectrum of light mesons and their excitations. We make available our algorithm and software for the extraction of spectral densities, that can be applied to theories with other gauge groups, including the theory of strong interactions (QCD) governing hadronic physics in the standard model. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
7 |