Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/11165
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Type: | Journal article |
Title: | Nonperturbative improvement and tree-level correction of the quark propagator |
Author: | Skullerud, J. Leinweber, D. Williams, A. |
Citation: | Physical Review D: Particles, Fields, Gravitation and Cosmology, 2001; 64(7):074508-1-074508-9 |
Publisher: | American Physical Soc |
Issue Date: | 2001 |
ISSN: | 1550-7998 0556-2821 |
Statement of Responsibility: | Jonivar Skullerud, Derek B. Leinweber and Anthony G. Williams |
Abstract: | We extend an earlier study of the Landau gauge quark propagator in quenched QCD where we used two forms of the O(a)-improved propagator with the Sheikholeslami-Wohlert quark action. In the present study we use the nonperturbative value for the clover coefficient csw and mean-field improvement coefficients in our improved quark propagators. We compare this with our earlier results which used the mean-field csw and tree-level improvement coefficients for the propagator. We also compare three different implementations of tree-level correction: additive, multiplicative, and hybrid. We show that the hybrid approach is the most robust and reliable and can successfully deal even with strong ultraviolet behavior and zero crossing of the lattice tree-level expression. We find good agreement between our improved quark propagators when using the appropriate nonperturbative improvement coefficients and hybrid tree-level correction. We also present a simple extrapolation of the quark mass function to the chiral limit. |
Rights: | ©2001 The American Physical Society |
DOI: | 10.1103/PhysRevD.64.074508 |
Published version: | http://dx.doi.org/10.1103/physrevd.64.074508 |
Appears in Collections: | Aurora harvest 2 Special Research Centre for the Subatomic Structure of Matter publications |
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hdl_11165.pdf | Published version | 424.56 kB | Adobe PDF | View/Open |
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