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Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice

Ed Bennett Orcid Logo, Yasumichi Aoki Orcid Logo, Tatsumi Aoyama, Toshihide Maskawa, Kohtaroh Miura Orcid Logo, Hiroshi Ohki, Enrico Rinaldi Orcid Logo, Akihiro Shibata, Koichi Yamawaki, Takeshi Yamazaki

Physical Review D

Swansea University Author: Ed Bennett Orcid Logo

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DOI (Published version): 10.1103/vnml-g6nx

Abstract

SU(3) gauge theories with an increasing number of light fermions are the templates of strongly interacting sectors and studying their low-energy dynamics and spectrum is important, both forunderstanding the strong dynamics of QCD itself, and for discovering viable UV completions ofbeyond the Standar...

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Published in: Physical Review D
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URI: https://cronfa.swan.ac.uk/Record/cronfa70956
first_indexed 2025-11-21T10:48:50Z
last_indexed 2025-11-22T05:32:25Z
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spelling 2025-11-21T10:48:47.6556468 v2 70956 2025-11-21 Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice e1a8e7927d2b093acdc54e74eac95e38 0000-0002-1678-6701 Ed Bennett Ed Bennett true false 2025-11-21 MACS SU(3) gauge theories with an increasing number of light fermions are the templates of strongly interacting sectors and studying their low-energy dynamics and spectrum is important, both forunderstanding the strong dynamics of QCD itself, and for discovering viable UV completions ofbeyond the Standard Model physics. In order to contrast many-flavor strongly interacting theories with QCD on a quantitative footing, we use lattice field theory simulations. We focus on the study of the flavor-singlet spectrum in the scalar and pseudoscalar channels: This is an interesting probe of thedynamics of the strongly interacting sector, as reminded by the QCD case with the f0(500) (σ) and η'mesons. The hierarchy of the spectrum of a strongly coupled new gauge sector of the Standard Modeldefines the potential reach of future colliders for new physics discoveries. In addition to a novel hierarchy with light scalars, introducing many light flavors at fixed number of colors can influence the dynamics of the lightest flavor-singlet pseudoscalar. We present a complete lattice study of both of these flavor-singlet channels on high-statistics gauge ensembles generated by the LatKMI Collaboration with 4, 8, and 12 copies of light mass-degenerate fermions. We also present other hadron masses on the lightest ensemble for Nf = 8 generated by the LatKMI Collaboration and discuss the chiral extrapolation of the spectrum in this particular theory. We contrast the results to Nf = 4 simulations and previous results of Nf = 12 simulations. Journal Article Physical Review D 0 0 0 0001-01-01 10.1103/vnml-g6nx COLLEGE NANME Mathematics and Computer Science School COLLEGE CODE MACS Swansea University Not Required 2025-11-21T10:48:47.6556468 2025-11-21T10:37:14.8838609 Faculty of Science and Engineering School of Mathematics and Computer Science - Mathematics Ed Bennett 0000-0002-1678-6701 1 Yasumichi Aoki https://orcid.org/0000-0003-4096-8836 2 Tatsumi Aoyama 3 Toshihide Maskawa 4 Kohtaroh Miura https://orcid.org/0000-0002-6975-0446 5 Hiroshi Ohki 6 Enrico Rinaldi https://orcid.org/0000-0003-4134-809X 7 Akihiro Shibata 8 Koichi Yamawaki 9 Takeshi Yamazaki 10 342 Ed Bennett 0000-0002-1678-6701 e.j.bennett@swansea.ac.uk true https://doi.org/10.5281/zenodo.17037868 false
title Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
spellingShingle Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
Ed Bennett
title_short Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
title_full Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
title_fullStr Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
title_full_unstemmed Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
title_sort Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
author_id_str_mv e1a8e7927d2b093acdc54e74eac95e38
author_id_fullname_str_mv e1a8e7927d2b093acdc54e74eac95e38_***_Ed Bennett
author Ed Bennett
author2 Ed Bennett
Yasumichi Aoki
Tatsumi Aoyama
Toshihide Maskawa
Kohtaroh Miura
Hiroshi Ohki
Enrico Rinaldi
Akihiro Shibata
Koichi Yamawaki
Takeshi Yamazaki
format Journal article
container_title Physical Review D
institution Swansea University
doi_str_mv 10.1103/vnml-g6nx
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 Mathematics and Computer Science - Mathematics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Mathematics and Computer Science - Mathematics
document_store_str 0
active_str 0
description SU(3) gauge theories with an increasing number of light fermions are the templates of strongly interacting sectors and studying their low-energy dynamics and spectrum is important, both forunderstanding the strong dynamics of QCD itself, and for discovering viable UV completions ofbeyond the Standard Model physics. In order to contrast many-flavor strongly interacting theories with QCD on a quantitative footing, we use lattice field theory simulations. We focus on the study of the flavor-singlet spectrum in the scalar and pseudoscalar channels: This is an interesting probe of thedynamics of the strongly interacting sector, as reminded by the QCD case with the f0(500) (σ) and η'mesons. The hierarchy of the spectrum of a strongly coupled new gauge sector of the Standard Modeldefines the potential reach of future colliders for new physics discoveries. In addition to a novel hierarchy with light scalars, introducing many light flavors at fixed number of colors can influence the dynamics of the lightest flavor-singlet pseudoscalar. We present a complete lattice study of both of these flavor-singlet channels on high-statistics gauge ensembles generated by the LatKMI Collaboration with 4, 8, and 12 copies of light mass-degenerate fermions. We also present other hadron masses on the lightest ensemble for Nf = 8 generated by the LatKMI Collaboration and discuss the chiral extrapolation of the spectrum in this particular theory. We contrast the results to Nf = 4 simulations and previous results of Nf = 12 simulations.
published_date 0001-01-01T05:32:03Z
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score 11.089386

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