منابع مشابه
Chiral anomalies and rooted staggered fermions
A popular approximation in lattice gauge theory is an extrapolation in the number of fermion species away from the four fold degeneracy natural with the staggered fermion formulation. I show that the procedure mutilates the expected continuum holomorphic behavior in the quark masses. This is due to a chiral symmetry group that is of a higher rank than desired. The conventional resolution propos...
متن کاملUnexpected Results in the Chiral Limit with Staggered Fermions
A cluster algorithm is constructed and applied to study the chiral limit of the strongly coupled lattice Schwinger model involving staggered fermions. The algorithm is based on a novel loop representation of the model. Finite size scaling of the chiral susceptibility based on data from lattices of size up to 64 × 64 indicates the absence of long range correlations at strong couplings. Assuming ...
متن کاملLocality with staggered fermions
We address the locality problem arising in simulations, which take the square root of the staggered fermion determinant as a Boltzmann weight to reduce the number of dynamical quark tastes. A definition of such a theory necessitates an underlying local fermion operator with the same determinant and the corresponding Green’s functions to establish causality and unitarity. We illustrate this poin...
متن کاملComment on “ Chiral anomalies and rooted staggered fermions ”
In hep-lat/0701018, Creutz claims that the rooting trick used in simulations of staggered fermions to reduce the number of tastes misses key physics whenever the desired theory has an odd number of continuum flavors, and uses this argument to call into question the rooting trick in general. Here we show that his argument fails as the continuum limit is approached, and therefore does not imply a...
متن کاملPartial Flavor Symmetry Restoration for Chiral Staggered Fermions
We study the leading discretization errors for staggered fermions by first constructing the continuum effective Lagrangian including terms of O(a2), and then constructing the corresponding effective chiral Lagrangian. The terms of O(a2) in the continuum effective Lagrangian completely break the SU(4) flavor symmetry down to the discrete subgroup respected by the lattice theory. We find, however...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2003
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)01511-1