Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-12-16
PoS Confinement8:014,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, contribution to Confinement8, Mainz, Germany
Scientific paper
In this talk, I will give an overview of the theoretical status of staggered Lattice QCD with the "fourth-root trick." In this regularization of QCD, a separate staggered quark field is used for each physical flavor, and the inherent four-fold multiplicity that comes with the use of staggered fermions is removed by taking the fourth root of the staggered determinant for each flavor. At nonzero lattice spacing, the resulting theory is nonlocal and not unitary, but there are now strong arguments that this disease is cured in the continuum limit. In addition, the approach to the continuum limit can be understood in detail in the framework of effective field theories such as staggered chiral perturbation theory.
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