High-precision calculation of the strange nucleon electromagnetic form factors
Abstract
We report a direct lattice QCD calculation of the strange nucleon electromagnetic form factors G s E and G s M in the kinematic range 0 ≤ Q 2 ≤ 1.2GeV 2. For the first time, both G s E and G s M are shown to be nonzero with high significance. This work uses closer-to-physical lattice parameters than previous calculations, and achieves an unprecented statistical precision by implementing a recently proposed variance reduction technique called hierarchical probing. We perform model-independent fits of the form factor shapes using the z-expansion and determine the strange electric and magnetic radii and magnetic moment. As a result, we compare our results to parity-violating electron-proton scattering data and to other theoretical studies.
- Authors:
-
- Johannes Gutenberg Univ., Mainz (Germany)
- Univ. of Arizona, Tucson, AZ (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- New Mexico State Univ., Las Cruces, NM (United States)
- Bergische Univ., Wuppertal (Germany); Julich Supercomputing Centre, Julich (Germany)
- College of William and Mary, Williamsburg, VA (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
- OSTI Identifier:
- 1214828
- Alternate Identifier(s):
- OSTI ID: 1213099
- Report Number(s):
- JLAB-THY-15-2043; DOE/OR/23177-3345; arXiv:1505.01803
Journal ID: ISSN 1550-7998; PRVDAQ
- Grant/Contract Number:
- FG02–94ER40818; FG02–96ER40965; FC02–12ER41890; FG02-04ER41302; AC05-06OR23177; AC02–05CH11231; ACI-1053575; CCF-121834; SFB–TRR; FG02-94ER40818; FC02-12ER41890
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 3; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Green, Jeremy, Meinel, Stefan, Engelhardt, Michael G., Krieg, Stefan, Laeuchli, Jesse, Negele, John W., Orginos, Kostas, Pochinsky, Andrew, and Syritsyn, Sergey. High-precision calculation of the strange nucleon electromagnetic form factors. United States: N. p., 2015.
Web. doi:10.1103/PhysRevD.92.031501.
Green, Jeremy, Meinel, Stefan, Engelhardt, Michael G., Krieg, Stefan, Laeuchli, Jesse, Negele, John W., Orginos, Kostas, Pochinsky, Andrew, & Syritsyn, Sergey. High-precision calculation of the strange nucleon electromagnetic form factors. United States. doi:10.1103/PhysRevD.92.031501.
Green, Jeremy, Meinel, Stefan, Engelhardt, Michael G., Krieg, Stefan, Laeuchli, Jesse, Negele, John W., Orginos, Kostas, Pochinsky, Andrew, and Syritsyn, Sergey. Wed .
"High-precision calculation of the strange nucleon electromagnetic form factors". United States. doi:10.1103/PhysRevD.92.031501. https://www.osti.gov/servlets/purl/1214828.
@article{osti_1214828,
title = {High-precision calculation of the strange nucleon electromagnetic form factors},
author = {Green, Jeremy and Meinel, Stefan and Engelhardt, Michael G. and Krieg, Stefan and Laeuchli, Jesse and Negele, John W. and Orginos, Kostas and Pochinsky, Andrew and Syritsyn, Sergey},
abstractNote = {We report a direct lattice QCD calculation of the strange nucleon electromagnetic form factors GsE and GsM in the kinematic range 0 ≤ Q2 ≤ 1.2GeV2. For the first time, both GsE and GsM are shown to be nonzero with high significance. This work uses closer-to-physical lattice parameters than previous calculations, and achieves an unprecented statistical precision by implementing a recently proposed variance reduction technique called hierarchical probing. We perform model-independent fits of the form factor shapes using the z-expansion and determine the strange electric and magnetic radii and magnetic moment. As a result, we compare our results to parity-violating electron-proton scattering data and to other theoretical studies.},
doi = {10.1103/PhysRevD.92.031501},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 3,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}
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