This title appears in the Scientific Report : 2013 

Taste-split staggered actions: eigenvalues, chiralities and Symanzik improvement
Durr, Stephan (Corresponding author)
Jülich Supercomputing Center; JSC
Physical Review D Physical review / D, 87 87 (2013 2013) 11 11, S. 114501 114501
[S.l.] Soc. 2013
2013-06-03
2013-06-01
10.1103/PhysRevD.87.114501
Journal Article
Computational Science and Mathematical Methods
OpenAccess
Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.87.114501 in citations.
Please use the identifier: http://hdl.handle.net/2128/5715 in citations.
The eigenvalue spectra of staggered fermions with an Adams and/or Hoelbling mass term are studied. The chiralities of the eigenmodes reflect whether the chirality linked to the unflavored approximate (γ5×1) or the flavored exact (γ5×ξ5) staggered symmetry is considered, and which one of the RR, LR, RL, LL eigenmode definitions is used. In either case a sensitivity to the topological charge of the gauge background is found. We discuss how to remove the leading cutoff effects of these actions by means of a properly tuned improvement term and/or the overlap procedure. The combination of Symanzik improvement and link smearing radically improves the properties of the physical branch.