ORCID

Abstract

We report the masses of the lightest spin-0 and spin-2 glueballs obtained in an extensive lattice study of the continuum and infinite volume limits of SpðNcÞ gauge theories for Nc ¼ 2, 4, 6, 8. We also extrapolate the combined results toward the large-Nc limit. We compute the ratio of scalar and tensor masses, and observe evidence that this ratio is independent of Nc. Other lattice studies of Yang-Mills theories at the same space-time dimension provide a compatible ratio. We further compare these results to various analytical ones and discuss them in view of symmetry-based arguments related to the breaking of scale invariance in the underlying dynamics, showing that a constant ratio might emerge in a scenario in which the 0þþ glueball is interpreted as a dilaton state.

DOI

10.1103/physrevd.102.011501

Publication Date

2020-07-08

Publication Title

Physical Review D

Volume

102

Issue

1

ISSN

2470-0010

Embargo Period

2023-08-16

Organisational Unit

School of Engineering, Computing and Mathematics

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