Journal article 54 views
Novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice
Ed Bennett 
,
Yasumichi Aoki ,
Tatsumi Aoyama,
Toshihide Maskawa,
Kohtaroh Miura ,
Hiroshi Ohki,
Enrico Rinaldi ,
Akihiro Shibata,
Koichi Yamawaki,
Takeshi Yamazaki
,
Yasumichi Aoki ,
Tatsumi Aoyama,
Toshihide Maskawa,
Kohtaroh Miura ,
Hiroshi Ohki,
Enrico Rinaldi ,
Akihiro Shibata,
Koichi Yamawaki,
Takeshi Yamazaki
Physical Review D
Swansea University Author:
Ed Bennett
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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...
| Published in: | Physical Review D |
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| Published: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa70956 |
| 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 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. |
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| College: |
Faculty of Science and Engineering |