Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2004-12-20
Phys.Rev. D71 (2005) 094020
Physics
High Energy Physics
High Energy Physics - Lattice
14 pages, 1 figure. v3: Spurious symbol, introduced by conflicting tex macros, removed. Clarification of discussion in several
Scientific paper
10.1103/PhysRevD.71.094020
Durr and Hoelbling recently observed that the continuum and chiral limits do not commute in the two dimensional, one flavor, Schwinger model with staggered fermions. I point out that such lack of commutativity can also be seen in four-dimensional staggered chiral perturbation theory (SChPT) in quenched or partially quenched quantities constructed to be particularly sensitive to the chiral limit. Although the physics involved in the SChPT examples is quite different from that in the Schwinger model, neither singularity seems to be connected to the trick of taking the nth root of the fermion determinant to remove unwanted degrees of freedom ("tastes"). Further, I argue that the singularities in SChPT are absent in most commonly-computed quantities in the unquenched (full) QCD case and do not imply any unexpected systematic errors in recent MILC calculations with staggered fermions.
No associations
LandOfFree
Order of the Chiral and Continuum Limits in Staggered Chiral Perturbation Theory 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 Order of the Chiral and Continuum Limits in Staggered Chiral Perturbation Theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Order of the Chiral and Continuum Limits in Staggered Chiral Perturbation Theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-121391