Revisiting Chiral Extrapolation by Studying a Lattice Quark Propagator
ZHANG Yan-Bin1,2, SUN Wei-Min1,2, LÜ Xiao-Fu3, ZONG Hong-Shi1,2
1Department of Physics, Nanjing University, Nanjing 2100932Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 2100933Department of Physics, Sichuan University, Chengdu 610064
Revisiting Chiral Extrapolation by Studying a Lattice Quark Propagator
ZHANG Yan-Bin1,2, SUN Wei-Min1,2, LÜ Xiao-Fu3, ZONG Hong-Shi1,2
1Department of Physics, Nanjing University, Nanjing 2100932Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 2100933Department of Physics, Sichuan University, Chengdu 610064
摘要The quark propagator in the Landau gauge is studied on the lattice, including the quenched and the unquenched results. No obvious unquenched effects are found by comparing the quenched quark propagator with the dynamical one. For the quenched and unquenched configurations, the results with different quark masses have been computed. For the quark mass function, a nonlinear chiral extrapolating behavior is found in the infrared region for both the quenched and dynamical results.
Abstract：The quark propagator in the Landau gauge is studied on the lattice, including the quenched and the unquenched results. No obvious unquenched effects are found by comparing the quenched quark propagator with the dynamical one. For the quenched and unquenched configurations, the results with different quark masses have been computed. For the quark mass function, a nonlinear chiral extrapolating behavior is found in the infrared region for both the quenched and dynamical results.
[1] Burden C J, Roberts C D and Williams A G 1992 Phys.Lett. B 285 347 [2] Bhagwat M S, Pichowsky M A, Roberts C D and Tandy P C 2003 Phys. Rev. C 68 015203 [3] Zong H S, Chang L, Hou F Y, Sun W M and Liu Y X 2005 Phys. Rev. C 71 015205 [4] Bowman P O, Heller U M, Leinweber D B, Williams A G andZhang J B 2005 Lecture Notes Phys. 663 17 [5] Skullerud J I and Williams A G 2001 Phys. Rev. D 63 054508 [6] Bowman P O, Heller U M and Williams A G 2002 Phys.Rev. D 66 014505 [7] Bowman P O, Heller U M, Leinweber D B, Parappilly M B,Williams A G and Zhang J B 2005 Phys. Rev. D 71 054507 [8] Kamleh W, Bowman P O, Leinweber D B, Williams A G andZhang J B 2007 Phys. Rev. D 76 094501 [9] Furui S and Nakajima H 2006 Phys. Rev. D 73074503 [10] Bonnet F D R et al 2002 Phys. Rev. D 65114503 [11] Zhang J B, Bowman P O, Coad R J, Heller U M, Leinweber DB and Williams A G 2005 Phys. Rev. D 71 014501 [12] Zhang J B et al. 2004 Phys. Rev. D 70 034505 [13] Fischer C S, Nickel D and Wambach J 2007 Phys. Rev.D 76 094009 [14] Nickel D, Fischer C S and Wambach J 2008 Prog. Part.Nucl. Phys. 61 81 [15] Fischer C S and Pennington M R 2006 Phys. Rev. D 73 034029 [16] NERSC Gauge Connection http://qcd.nersc.gov. [17] Kilcup G 1993 Phys. Rev. Lett. 71 1677 [18] Kilcup G, Pekurovsky D and Venkataraman L 1997 Nucl.Phys. Proc. Suppl. 53 345 [19] Bernard C et al 2001 Phys. Rev. D 64 054506 [20] Zhang Y B et al 2008 Commun. Theor. Phys. 50125 [21] http://www.physics.utah.edu/{\%7Edtar/milc/index.html
2009, Vol. 26 
