Towards measuring the eta' mass with N_f=2+1 staggered fermions
arXiv:hep-lat/0511038 · doi:10.1016/j.nuclphysbps.2006.01.021
Abstract
Because the propagators of flavor-singlet states incorporate disconnected diagrams, they are uniquely sensitive to any differences in the actions governing sea and valence fermions on the lattice. As such, they present an important test of the validity of the ``fourth-root trick'' in the staggered fermion formulation. The pseudoscalar's relationship to topological charge also makes it of theoretical interest. We present preliminary results from our measurements of flavor-singlet pseudoscalar mesons on 2+1 flavor Asqtad lattices, and discuss some strategies for improving the signal-to-error ratio of disconnected singlet correlators.
arXiv comment7 pages, 5 figures, to appear in proceedings of Computational Hadron Physics, Nicosia, Cyprus, 14-17 Sep 2005
References in corpus (17)
- The Chroma Software System for Lattice QCD
- The QCD spectrum with three quark flavors
- Chiral Perturbation Theory for the Quenched Approximation of QCD
- Light hadrons with improved staggered quarks: approaching the continuum limit
- Variants of fattening and flavor symmetry restoration
- Partially Quenched Gauge Theories and a Application to Staggered Fermions
- Flavor-Symmetry Restoration and Symanzik Improvement for Staggered Quarks
- Stochastic Estimation with Noise
- Testing improved actions for dynamical Kogut-Susskind quarks
- The eta and eta' mesons in QCD
- Improved Wilson QCD simulations with light quark masses
- Topology, fermionic zero modes and flavor singlet correlators in finite temperature QCD
- Witten-Veneziano Relation, Quenched QCD, and Overlap Fermions
- Flavour singlet pseudoscalar masses in N_f = 2 QCD
- Evaluating Sea Quark Contributions to Flavour-Singlet Operators in Lattice QCD
- Flavor Singlet Meson Mass in the Continuum Limit in Two-Flavor Lattice QCD
- Computing the eta and eta' Mesons in Lattice QCD