Comparison Studies of Finite Momentum Correlators on Anisotropic and Isotropic Lattices

TL;DR

This study compares finite momentum correlators on anisotropic and isotropic lattices, demonstrating that anisotropic lattices improve signal extraction at higher momenta for heavy-light meson decays.

Contribution

It provides a detailed comparison showing that anisotropic lattices enhance the quality of signals for high-momentum correlators in lattice QCD simulations.

Findings

Anisotropic lattices yield better signals at higher momenta.

Initial form factor results are presented with tree-level matching.

Comparisons inform optimal lattice choices for heavy-light decay studies.

Abstract

We study hadronic two- and three-point correlators relevant for heavy to light pseudoscalar meson semi-leptonic decays, using Symanzik improved glue, D234 light quark and NRQCD heavy quark actions. Detailed comparisons are made between simulations on anisotropic and isotropic lattices involving finite momentum hadrons. We find evidence that having an anisotropy helps in extracting better signals at higher momenta. Initial results for the form factors f_+(q^2) and f_0(q^2) are presented with tree-level matching of the lattice heavy-light currents.