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Type: Journal article
Title: Glueball spectrum and matrix elements on anisotropic lattices
Author: Chen, Yanbei
Alexandru, Andrei
Dong, Shao-Jing
Draper, Terrence
Horvath, Ivan
Lee, Frank X.
Liu, K. F.
Mathur, Nilmani
Morningstar, C.
Peardon, Michael J.
Tamhankar, Sonali
Young, B. L.
Zhang, Jian-Bo
Citation: Physical Review D,2006; 73(1):014516
Publisher: American Physical Society
Issue Date: 2006
ISSN: 1550-7998
School/Discipline: School of Chemistry and Physics : Physics and Mathematical Physics
Statement of
Y. Chen, A. Alexandru, S. J. Dong, T. Draper, I. Horváth, F. X. Lee, K. F. Liu, N. Mathur, C. Morningstar, M. Peardon, S. Tamhankar, B. L. Young, and J. B. Zhang
Abstract: The glueball-to-vacuum matrix elements of local gluonic operators in scalar, tensor, and pseudoscalar channels are investigated numerically on several anisotropic lattices with the spatial lattice spacing ranging from 0.1–0.2 fm. These matrix elements are needed to predict the glueball branching ratios in J/ψ radiative decays which will help identify the glueball states in experiments. Two types of improved local gluonic operators are constructed for a self-consistent check and the finite-volume effects are studied. We find that lattice spacing dependence of our results is very weak and the continuum limits are reliably extrapolated, as a result of improvement of the lattice gauge action and local operators. We also give updated glueball masses with various quantum numbers.
Rights: ©2006 American Physical Society
DOI: 10.1103/PhysRevD.73.014516
Appears in Collections:Physics publications

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