Nucleon matrix elements using the variational method in lattice QCD



Dragos, J, Horsley, R, Kamleh, W, Leinweber, DB, Nakamura, Y, Rakow, PEL ORCID: 0000-0003-4486-2158, Schierholz, G, Young, RD and Zanotti, JM
(2016) Nucleon matrix elements using the variational method in lattice QCD. PHYSICAL REVIEW D, 94 (7). 074505-.

[img] Text
1606.03195.pdf - Author Accepted Manuscript

Download (1MB)

Abstract

The extraction of hadron matrix elements in lattice QCD using the standard two- and three-point correlator functions demands careful attention to systematic uncertainties. One of the most commonly studied sources of systematic error is contamination from excited states. We apply the variational method to calculate the axial vector current gA, the scalar current gS, the scalar current gT and the quark momentum fraction x of the nucleon and we compare the results to the more commonly used summation and two-exponential fit methods. The results demonstrate that the variational approach offers a more efficient and robust method for the determination of nucleon matrix elements.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 09 Feb 2017 11:58
Last Modified: 15 Mar 2024 07:29
DOI: 10.1103/PhysRevD.94.074505
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3005617