69 citations · 199 across the 9 of their papers we have counts for
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Charmless chiral perturbation theory for N_f=2+1+1 twisted mass lattice QCD
Oliver Baer, Ben Horz
The chiral Lagrangian describing the low-energy behavior of N_f=2+1+1 twisted mass lattice QCD is constructed through O(a^2). In contrast to existing results the effects of a heavy…
Chiral perturbation theory for gradient flow observables
Oliver Bar, Maarten Golterman
We construct the next-to-leading order chiral lagrangian for scalar and pseudo-scalar densities defined using the gradient flow. We calculate the chiral condensate and the pion dec…
Excited-state contribution to the axial-vector and pseudo-scalar correlators with two extra pions
Oliver Bar, Maarten Golterman
We study multi-particle state contributions to the QCD two-point functions of the axial-vector and pseudo-scalar quark bilinears in a finite spatial volume. For sufficiently small…
Flavor symmetry breaking in mixed-action QCD
Oliver Baer, Maarten Golterman, Yigal Shamir
We study the phase structure of mixed-action QCD with two Wilson sea quarks and two chiral valence quarks, starting from the chiral lagrangian. A priori, the effective theory allow…
The epsilon regime with twisted mass Wilson fermions
O. Bar, S. Necco, A. Shindler
We investigate the leading lattice spacing effects in mesonic two-point correlators computed with twisted mass Wilson fermions in the epsilon-regime. By generalizing the procedure…
On Witten's global anomaly for higher SU(2) representations
O. Baer
The spectral flow of the overlap operator is computed numerically along a particular path in gauge field space. The path connects two gauge equivalent configurations which differ b…
Quantum Link Models with Many Rishon Flavors and with Many Colors
O. Baer, R. Brower, B. Schlittgen +1
Quantum link models are a novel formulation of gauge theories in terms of discrete degrees of freedom. These degrees of freedom are described by quantum operators acting in a finit…
Global Anomalies in chiral gauge theories on the lattice
Oliver Baer, Isabel Campos
We discuss the issue of global anomalies in chiral gauge theories on the lattice. In Luscher's approach, these obstructions make it impossible to define consistently a fermionic me…