Quenched Chiral Log and Light Quark Mass from Overlap Fermions

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We study the quenched chiral behavior of the pion with mass as low as {approx} 180 MeV. The calculation is done on a quenched lattice of size 16{sup 3} x 28 and a = 0.2 fm with 80 configurations using overlap fermions and an improved gauge action. Using an improved constrained curve fitting technique, we find that the ground state pseudoscalar mass versus bare quark mass behavior is well controlled with small statistical errors; this permits a reliable fit of the quenched chiral log effects, a determination of the chiral log parameter ({delta} = 0.26(3)), and an estimate of the ... continued below

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99 Kilobytes pages

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Draper, Terrence; Dong, Shao-Jing; Horvath, Ivan; Lee, Frank; Liu, Keh-Fei; Mathur, Nilmani et al. June 1, 2002.

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We study the quenched chiral behavior of the pion with mass as low as {approx} 180 MeV. The calculation is done on a quenched lattice of size 16{sup 3} x 28 and a = 0.2 fm with 80 configurations using overlap fermions and an improved gauge action. Using an improved constrained curve fitting technique, we find that the ground state pseudoscalar mass versus bare quark mass behavior is well controlled with small statistical errors; this permits a reliable fit of the quenched chiral log effects, a determination of the chiral log parameter ({delta} = 0.26(3)), and an estimate of the renormalized mass of the light quark (m{sup {ovr MS}}({mu} = 2 GeV) = 3.7(3) MeV).

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99 Kilobytes pages

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  • 20th International Symposium on Lattice Field Theory (LATTICE 2002), Boston, MA (US), 06/24/2002--06/29/2002

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  • Report No.: JLAB-THY-02-38
  • Report No.: DOE-ER/40150-2150
  • Report No.: hep-lat/0208045
  • Report No.: UK-02-13
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 801035
  • Archival Resource Key: ark:/67531/metadc738615

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  • June 1, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 5, 2016, 8:28 p.m.

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Draper, Terrence; Dong, Shao-Jing; Horvath, Ivan; Lee, Frank; Liu, Keh-Fei; Mathur, Nilmani et al. Quenched Chiral Log and Light Quark Mass from Overlap Fermions, article, June 1, 2002; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc738615/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.