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

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-si...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. D 2024-09, Vol.110 (5), Article 054501
Main Authors: Brower, R. C., Owen, E., Rebbi, C., Culver, C., Schaich, D., Cushman, K. K., Fleming, G. T., Gasbarro, A., Hasenfratz, A., Neil, E. T., Ingoldby, J., Jin, X. Y., Osborn, J. C., Rinaldi, E., Vranas, P., Weinberg, E., Witzel, O.
Format: Article
Language:English
Subjects:
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 σ ( J P C = 0 + + ) in contrast to the N f = 2 theory QCD. In this work, we study the finite-volume dependence of the σ meson correlation function computed in lattice gauge theory and determine the σ 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 .
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.110.054501