PoS - Proceedings of Science
Volume 334 - The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018) - Hadron Spectroscopy and Interactions
Controlling Excited-State Contributions to Nucleon Isovector Charges using Distillation
C. Egerer*, D.G. Richards and F. Winter
Full text: pdf
Published on: May 29, 2019
Reliable calculations in Lattice QCD must confront excited-state contamination and statistical precision, where attempts to reduce excited-state effects are often handled with various "smearing" algorithms. Distillation, a particularly powerful form of smearing, has seen extensive use in spectroscopy calculations, yet, until now, has not seen use in calculations of hadronic structure. We find that distillation, and an extended basis of distilled interpolators facilitated by the variational method, applied to calculations of the scalar, axial and tensor isovector charges of the nucleon, lead to a dramatic reduction in statistical uncertainty and excited-state contamination when compared to conventional methods, thereby making a strong case for distillation in future, more elaborate, structure calculations.
DOI: https://doi.org/10.22323/1.334.0063
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.