Combining Quark and Link Smearing to Improve Extended Baryon Operators

Conference · Thu Sep 29 00:00:00 EDT 2005

OSTI ID:850525

Lichtl, Adam; Basak, Subhasish; Edwards, Robert; Fleming, George T; Heller, Urs M; Morningstar, Colin; Richards, David; Sato, Ikuro; Wallace, Stephen

The effects of Gaussian quark-field smearing and analytic stout-link smearing on the correlations of gauge-invariant extended baryon operators are studied. Gaussian quark-field smearing substantially reduces contributions from the short wavelength modes of the theory, while stout-link smearing significantly reduces the noise from the stochastic evaluations. The use of gauge-link smearing is shown to be crucial for baryon operators constructed of covariantly-displaced quark fields. Preferred smearing parameters are determined for a lattice spacing a_s ~ 0.1 fm.

• Research Organization: TJNAF (Thomas Jefferson National Accelerator Facility, Newport News, VA)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 850525
• Report Number(s): JLAB-THY-05-414; DOE/ER/40150-3611; hep-lat/0509179
• Resource Relation: Conference: 23rd International Symposium On Lattice Field Field: Lattice 2005, 25-30 Jul 2005, Trinity College, Dublin, Ireland
• Country of Publication: United States
• Language: English