Browsing by Author "Holligan, Jack"

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Color dependence of tensor and scalar glueball masses in Yang-Mills theories
(2020-07-20)
Bennett, Ed
;
Holligan, Jack
;
Hong, Deog Ki
;
Lee, Jong-Wan
;
Lin, C. -J. David
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 Sp(N-c) gauge theories for N-c = 2, 4, 6, 8. We also extrapolate the combined results toward the large-N-c limit. We compute the ratio of scalar and tensor masses, and observe evidence that this ratio is independent of N-c. 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 0(++) glueball is interpreted as a dilaton state.