Abstract
Dependence of a/rc (inverse Sommer parameter in units of lattice spacing a) on amq (quark mass in lattice unit) has been observed in all lattice QCD simulat ions with sea quarks including the ones with improved actions. How much of this dependence is a scaling violation has remained an intriguing question. Our approach has been to investigate the issue with an action with known lattice artifacts, i.e., the standard Wilson quark and gauge action with β = 5.6 and 2 degenerate flavors of sea quarks on 16 3 × 32 lattices. In order to study in detail the sea quark mass dep endence, measurements are carried out at eight values of the PCAC quark mass values amq from about 0.07 to below 0.015. Though scaling violations may indeed be present for relatively large amq, a consistent scenario at sufficiently small amq seems to emerge in the mass-independent scheme where for a fixed β , 1/r0 and √ σ have linear dependence on mq as physical effects similar to the quark mass dependence of the rho mass. We present evidence for this scenario and accordingly extract the lattice scale ( a = 0.0805(7) fm, a −1 = 2.45(2) GeV) by chiral extrapolation to the
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
