Light scalar meson and decay constant in SU(3) gauge theory with eight dynamical flavors

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Brower, RC, Owen, E, Rebbi, C, Culver, C, Schaich, D ORCID: 0000-0002-9826-2951, Cushman, KK, Fleming, GT, Gasbarro, A, Hasenfratz, A, Neil, ET et al (show 7 more authors) , Ingoldby, J, Jin, XY, Osborn, JC, Rinaldi, E, Vranas, P, Weinberg, E and Witzel, O (2024) Light scalar meson and decay constant in SU(3) gauge theory with eight dynamical flavors Physical Review D, 110 (5). 054501-. ISSN 2470-0010, 2470-0029

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Abstract

The SU(3) gauge theory with $N_f=8$ nearly massless Dirac fermions has long been of theoretical and phenomenological interest due to the near-conformality arising from its proximity to the conformal window. One particularly interesting feature is the emergence of a relatively light, stable flavor-singlet scalar meson $\sigma (J^{PC}=0^{++})$ in contrast to the $N_f=2$ theory QCD. In this work, we study the finite-volume dependence of the $\sigma$ meson correlation function computed in lattice gauge theory and determine the $\sigma$ meson mass and decay constant extrapolated to the infinite-volume limit. We also determine the infinite-volume mass and decay constant of the flavor-nonsinglet scalar meson $a_0$. Published by the American Physical Society 2024

Item Type:	Article
Uncontrolled Keywords:	4902 Mathematical Physics, 5107 Particle and High Energy Physics, 49 Mathematical Sciences, 51 Physical Sciences
Divisions:	Faculty of Science & Engineering Faculty of Science & Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	23 Sep 2024 07:30
Last Modified:	28 Feb 2026 13:46
DOI:	10.1103/physrevd.110.054501
Open Access URL:	https://doi.org/10.1103/PhysRevD.110.054501
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3184681
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