Glueball spectrum and matrix elements on anisotropic lattices

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
Phys. Rev. D 73, 014516 – Published 26 January 2006

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.

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  • Received 13 October 2005

DOI:https://doi.org/10.1103/PhysRevD.73.014516

©2006 American Physical Society

Authors & Affiliations

Y. Chen1,2, A. Alexandru2, S. J. Dong2, T. Draper2, I. Horváth2, F. X. Lee3,4, K. F. Liu2, N. Mathur2,4, C. Morningstar5, M. Peardon6, S. Tamhankar2, B. L. Young7, and J. B. Zhang8

  • 1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
  • 2Department of Physics & Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
  • 3Center for Nuclear Studies, Department of Physics, George Washington University, Washington, D.C. 20052 USA
  • 4Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, USA
  • 5Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
  • 6School of Mathematics, Trinity College, Dublin, Dublin 2, Ireland
  • 7Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
  • 8CSSM and Department of Physics, University of Adelaide, Adelaide, SA 5005, Australia

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Issue

Vol. 73, Iss. 1 — 1 January 2006

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