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20 papers · 1 filter
The puzzle of apparent linear lattice artifacts in the 2d non-linear sigma-model and Symanzik's solution
Janos Balog, Ferenc Niedermayer, Peter Weisz
Lattice artifacts in the 2d O(n) non-linear sigma-model are expected to be of the form O(a^2), and hence it was (when first observed) disturbing that some quantities in the O(3) mo…
Logarithmic corrections to O(a^2) lattice artifacts
Janos Balog, Ferenc Niedermayer, Peter Weisz
We compute logarithmic corrections to the O(a^2) lattice artifacts for a class of lattice actions for the non-linear O(n) sigma-model in two dimensions. The generic leading artifac…
From Decay to Complete Breaking: Pulling the Strings in SU(2) Yang-Mills Theory
M. Pepe, U. -J. Wiese
We study {2Q+1}-strings connecting two static charges Q in (2+1)-d SU(2) Yang-Mills theory. While the fundamental {2}-string between two charges Q = 1/2 is unbreakable, the adjoint…
Efficient simulation of relativistic fermions via vertex models
Urs Wenger
We have developed an efficient simulation algorithm for strongly interacting relativistic fermions in two-dimensional field theories based on a formulation as a loop gas. The loop…
Flavor Twisted Boundary Conditions in the Breit Frame
Fu-Jiun Jiang, Brian C. Tiburzi
We use a generalization of chiral perturbation theory to account for the effects of flavor twisted boundary conditions in the Breit frame. The relevant framework for two light flav…
Chiral Corrections to Hyperon Axial Form Factors
Fu-Jiun Jiang, Brian C. Tiburzi
We study the complete set of flavor changing hyperon axial current matrix elements at small momentum transfer. Using partially quenched heavy baryon chiral perturbation theory, we…