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6 papers · 2 filters
Flavor Twisted Boundary Conditions, Pion Momentum, and the Pion Electromagnetic Form Factor
F. -J. Jiang, B. C. Tiburzi
We investigate the utility of partially twisted boundary conditions in lattice calculations of meson observables. For dynamical simulations, we show that the pion dispersion relati…
Exceptional Deconfinement in G(2) Gauge Theory
M. Pepe, U. -J. Wiese
The Z(N) center symmetry plays an important role in the deconfinement phase transition of SU(N) Yang-Mills theory at finite temperature. The exceptional group G(2) is the smallest…
Rationale for UV-filtered clover fermions
Stefano Capitani, Stephan Durr, Christian Hoelbling
We study the contributions Sigma_0 and Sigma_1, proportional to a^0 and a^1, to the fermion self-energy in Wilson's formulation of lattice QCD with UV-filtering in the fermion acti…
Lattice fermions with complex mass
Stephan Durr, Christian Hoelbling
We present evidence in the Schwinger model that rooted staggered fermions may correctly describe the m<0 sector of a theory with an odd number of flavors. We point out that in QCD-…
Efficient Cluster Algorithm for CP(N-1) Models
B. B Beard, M. Pepe, S. Riederer +1
Despite several attempts, no efficient cluster algorithm has been constructed for CP(N-1) models in the standard Wilson formulation of lattice field theory. In fact, there is a no-…
Finite volume effects for the pion mass at two loops
Gilberto Colangelo, Christoph Haefeli
We evaluate the pion mass in finite volume to two loops within Chiral Perturbation Theory. The results are compared with a recently proposed extension of the asymptotic formula of…