45 citations · 218 across the 11 of their papers we have counts for
8 papers · 1 filter
Determination of the weak Hamiltonian in the SU(4) chiral limit through topological zero-mode wave functions
P. Hernandez, M. Laine, C. Pena +3
A new method to determine the low-energy couplings of the weak Hamiltonian is presented. It relies on a matching of the topological poles in of three-point correlato…
Probing the chiral weak Hamiltonian at finite volumes
P. Hernandez, M. Laine
Non-leptonic kaon decays are often described through an effective chiral weak Hamiltonian, whose couplings ("low-energy constants") encode all non-perturbative QCD physics. It has…
On the determination of low-energy constants for transitions
L. Giusti, P. Hernandez, M. Laine +3
We present our preliminary results for three-point correlation functions involving the operators entering the effective Hamiltonian with an active charm quark, obtained us…
A strategy to study the role of the charm quark in explaining the Delta{I}=1/2 rule
L. Giusti, P. Hernandez, M. Laine +2
We present a strategy designed to separate several possible origins of the well-known enhancement of the Delta{I}=1/2 amplitude in non-leptonic kaon decays. In particular, we seek…
Low-energy couplings of QCD from topological zero-mode wave functions
L. Giusti, P. Hernandez, M. Laine +2
By matching 1/m^2 divergences in finite-volume two-point correlation functions of the scalar or pseudoscalar densities with those obtained in chiral perturbation theory, we derive…
Vector and Axial-Vector Propagators in the ε-Regime of QCD
P. H. Damgaard, P. Hernandez, K. Jansen +2
Using quenched and unquenched chiral perturbation theory we compute vector and axial current two-point functions at finite volume and fixed gauge field topology, in the so-called ε…
Finite-Size Scaling of Vector and Axial Current Correlators
P. H. Damgaard, P. Hernandez, K. Jansen +2
Using quenched chiral perturbation theory, we compute the long-distance behaviour of two-point functions of flavour non-singlet axial and vector currents in a finite volume, for sm…
Inverse Symmetry Breaking with 4d Lattice Simulations
K. Jansen, M. Laine
According to resummed perturbation theory, certain scalar theories have a global symmetry, which is restored in the vacuum but is broken at high temperatures. Recently, this phenom…