Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/12743
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Type: | Journal article |
Title: | Light hadron spectroscopy on coarse lattices with O(a²) mean-field-improved actions |
Other Titles: | Light hadron spectroscopy on coarse lattices with O(a(2)) mean-field-improved actions |
Author: | Lee, F. Leinweber, D. |
Citation: | Physical Review D: Particles, Fields, Gravitation and Cosmology, 1999; 59(7):074504- |
Publisher: | American Physical Society |
Issue Date: | 1999 |
ISSN: | 0556-2821 2470-0029 |
Statement of Responsibility: | Frank X. Lee, Derek B. Leinweber |
Abstract: | The masses and dispersions of light hadrons are calculated in lattice QCD using an O(a²) tadpole-improved gluon action and an O(a²) tadpole-improved next-nearest-neighbor fermion action originally proposed by Hamber and Wu. Two lattices of constant volume with lattice spacings of approximately 0.40 fm and 0.24 fm are considered. The results reveal some scaling violations at the coarser lattice spacing on the order of 5%. At the finer lattice spacing, the nucleon to rho mass ratio reproduces state-of-the-art results using unimproved actions. Good dispersion and rotational invariance up to momenta of pa≃1 are also found. The relative merit of alternative choices for improvement operators is assessed through close comparisons with other plaquette-based tadpole-improved actions. |
Rights: | © 1999 The American Physical Society |
DOI: | 10.1103/PhysRevD.59.074504 |
Published version: | http://dx.doi.org/10.1103/physrevd.59.074504 |
Appears in Collections: | Aurora harvest 7 Physics publications |
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hdl_12743.pdf | Published version | 154.4 kB | Adobe PDF | View/Open |
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