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Charmonium-glueball spectroscopy with improved hadron creation operators

Juan Andrés Urrea-Niño*

Francesco Knechtli and Tomasz Korzec

Michael Peardon

  • *Contact author: urreanij@tcd.ie

Phys. Rev. D 114, 014509 – Published 16 July, 2026

DOI: https://doi.org/10.1103/rs22-dx23

Abstract

Construction of creation operators which can properly sample the underlying energy eigenstates remains a fundamental first step in lattice QCD spectroscopy calculations, particularly when the spectrum includes states with different compositions such as mesons, glueballs, multiparticle states, etc. We tackle this issue in the study of the scalar glueball and charmonium mixing, where we use improved operators for both types of states to resolve the low-lying spectrum and identify the dominant composition of each state in a mass regime where the glueball is stable. We include derivative-based meson operators combined with distillation profiles, as well as glueball operators built from the chromomagnetic field and its derivatives which retain angular momentum information from their continuum counterparts. We comment on the advantages of these operators, particularly on the construction and implementation of the glueball ones, thanks to which we identify the lightest isoscalar state as glueball-dominated 0++.

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