Journal
PHYSICAL REVIEW D
Volume 69, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.69.074502
Keywords
-
Ask authors/readers for more resources
Quenched QCD simulations on three volumes 8(3)x, 12(3)x and 16(3)x32 and three couplings beta=5.7, 5.85 and 6.0 using domain wall fermions provide a consistent picture of quenched QCD. We demonstrate that the small induced effects of chiral symmetry breaking inherent in this formulation can be described by a residual mass (m(res)) whose size decreases as the separation between the domain walls (L-s) is increased. However, at stronger couplings much larger values of L-s are required to achieve a given physical value of m(res). For beta=6.0 and L-s=16, we find m(res)/m(s)=0.033(3), while for beta=5.7, and L-s=48, m(res)/m(s)=0.074(5), where m(s) is the strange quark mass. These values are significantly smaller than those obtained from a more naive determination in our earlier studies. Important effects of topological near zero modes which should afflict an accurate quenched calculation are easily visible in both the chiral condensate and the pion propagator. These effects can be controlled by working at an appropriately large volume. A non-linear behavior of m(pi)(2) in the limit of small quark mass suggests the presence of additional infrared subtlety in the quenched approximation. Good scaling is seen both in masses and in f(pi) over our entire range, with inverse lattice spacing varying between 1 and 2 GeV.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available