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The strong coupling from tau decays without prejudice
Diogo Boito, Maarten Golterman, Matthias Jamin +4
We review our recent determination of the strong coupling α_s from the OPAL data for non-strange hadronic tau decays. We find that α_s(m^2_τ) =0.325+-0.018 using fixed-order pertur…
Low-energy constants and condensates from the tau hadronic spectral functions
Diogo Boito, Maarten Golterman, Matthias Jamin +2
We use results of fits to the OPAL spectral data, obtained from non-strange hadronic τdecays, to evaluate the difference between the vector and axial current correlators, Π_{V-A}(Q…
Pade approximants and g-2 for the muon
Christopher Aubin, Thomas Blum, Maarten Golterman +1
The leading hadronic contribution to the muon anomalous magnetic moment is given by a weighted euclidean momentum integral of the hadronic vacuum polarization. This integral is dom…
Phase with no mass gap in non-perturbatively gauge-fixed Yang--Mills theory
Maarten Golterman, Yigal Shamir
An equivariantly gauge-fixed non-abelian gauge theory is a theory in which a coset of the gauge group, not containing the maximal abelian subgroup, is gauge fixed. Such theories ar…
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…
Model-independent parametrization of the hadronic vacuum polarization and g-2 for the muon on the lattice
Christopher Aubin, Thomas Blum, Maarten Golterman +1
The leading hadronic contribution to the muon anomalous magnetic moment is given by a weighted integral over euclidean momentum of the hadronic vacuum polarization. This integral i…