Exploring strange nucleon form factors on the lattice

Babich, Ronald, Brower, Richard C, Clark, Michael A, Fleming, George T, Osborn, James C, Rebbi, Claudio and Schaich, David ORCID: 0000-0002-9826-2951 (2012) Exploring strange nucleon form factors on the lattice PHYSICAL REVIEW D, 85 (5). 054510-. ISSN 2470-0010, 2470-0029

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Abstract

We discuss techniques for evaluating sea quark contributions to hadronic form factors on the lattice and apply these to an exploratory calculation of the strange electromagnetic, axial, and scalar form factors of the nucleon. We employ the Wilson gauge and fermion actions on an anisotropic 243×64 lattice, probing a range of momentum transfer with Q2<1GeV2. The strange electric and magnetic form factors, GEs(Q2) and GMs(Q2), are found to be small and consistent with zero within the statistics of our calculation. The lattice data favor a small negative value for the strange axial form factor GAs(Q2) and exhibit a strong signal for the bare strange scalar matrix element N|s̄s|N <inf>0</inf>. We discuss the unique systematic uncertainties affecting the latter quantity relative to the continuum, as well as prospects for improving future determinations with Wilson-like fermions. © 2012 American Physical Society.

Item Type:	Article
Additional Information:	19 pages, 11 figures; v2 includes additional references; v3 as appears in PRD
Uncontrolled Keywords:	hep-lat, hep-lat
Depositing User:	Symplectic Admin
Date Deposited:	13 Mar 2020 13:35
Last Modified:	16 Jun 2026 11:19
DOI:	10.1103/PhysRevD.85.054510
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3078915
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