We propose to use interpolating operators for lattice quantum chromodyanmics (QCD) calculations of highly-boosted pions and nucleons with kinematically-enhanced ground-state overlap factors at large momentum. Because this kinematic enhancement applies to the signal but not the variance of the correlation function, these interpolating operators can achieve better signal-to-noise ratios at large momentum. We perform proof-of-principle calculations with boosted pions and nucleons using close-to-physical and larger quark masses to explore the utility of our proposal. Results for effective energies and matrix elements, as well as Lanczos ground-state energy estimators, are consistent with theoretical expectations for signal-to-noise improvement at large momenta.
@article{arxiv.2501.00729,
title = {Kinematically-enhanced interpolating operators for boosted hadrons},
author = {Rui Zhang and Anthony V. Grebe and Daniel C. Hackett and Michael L. Wagman and Yong Zhao},
journal= {arXiv preprint arXiv:2501.00729},
year = {2025}
}