Work

Progress on meson-glueball mixing in lattice gauge theories coupled to fermions in multiple representations

Year: 2026

Type: preprint

Abstract: We present preliminary results from our numerical lattice investigation of the low-lying flavour-singlet bound states in the ${\rm Sp}(4)$ gauge theory coupled to fermions transforming in the fundamental and two-index antisymmetric representations. We use the Wilson gauge action and Wilson fermions. We employ the generalized eigenvalue problem (GEVP) method with a basis of smeared glueball and meson interpolating operators. We analyse two high-statistics ensembles with the same lattice coupling and different fermion mass. We study both the scalar and pseudoscalar states. We observe the first evidence for meson-glueball mixing in this theory. We improve upon previous determinations of the energy eigenstates and mixing angles in the flavour-singlet pseudoscalar sector.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.29861

Authors: Brito, Nuno, Bennett, Ed, Hong, Deog Ki, Lee, Jong-Wan, Lin, C. -J. David, Lucini, Biagio, Piai, Maurizio, Vadacchino, Davide, Zierler, Fabian

Institutions: Swansea University, Pusan National University, Institute for Basic Science

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science and Technology Council, UK Research and Innovation, University of Cambridge, University of Leicester, Science and Technology Facilities Council

Awards: G1482949933, G1611887104, G2064752020, G3097014641, Amplitudes, Strings and Duality, G360231030, STFC Plymouth 2022 DTP, G5501583532, G5997723384, G6222556801, G6638102323, G6730171746, Lattice investigations of strongly Interacting theories in the Standard Model and beyond., Theoretical Particle Physics and Cosmology, G847165597

OpenAlex ID: W7223203709

Cites: 2

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Related to: 10