Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2006-09-18
Nucl.Phys.B801:220-246,2008
Physics
High Energy Physics
High Energy Physics - Lattice
REVTeX 4, 20 pages, XXX tables, 1 figure. Added new Tables and comparisons made at the same energy scale, and many points in t
Scientific paper
10.1016/j.nuclphysb.2008.02.010
We investigate, in the framework of perturbation theory at finite $N_s$, the effectiveness of improved gauge actions in suppressing the chiral violations of domain-wall fermions. Our calculations show substantial reductions of the residual mass when it is compared at the same value of the gauge coupling, the largest suppression being obtained when the DBW2 action is used. Similar effects can also be observed for a power-divergent mixing coefficient which is chirally suppressed. No significant reduction instead can be seen in the case of the difference between the vector and axial-vector renormalization constants when improved gauge actions are used in place of the plaquette action. We also find that one-loop perturbation theory is not an adequate tool to carry out comparisons at the same energy scale (of about 2 GeV), and in fact in this case even an enhancement of the chiral violations is frequently obtained.
No associations
LandOfFree
Perturbative chiral violations for domain-wall QCD with improved gauge actions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Perturbative chiral violations for domain-wall QCD with improved gauge actions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perturbative chiral violations for domain-wall QCD with improved gauge actions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-647249