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Title: 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:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [6];  [8]
  1. Johannes Gutenberg Univ., Mainz (Germany)
  2. Univ. of Arizona, Tucson, AZ (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. New Mexico State Univ., Las Cruces, NM (United States)
  4. Bergische Univ., Wuppertal (Germany); Julich Supercomputing Centre, Julich (Germany)
  5. College of William and Mary, Williamsburg, VA (United States)
  6. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  7. College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  8. 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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Cited by: 24 works
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    Works referencing / citing this record:

    Hadronic light-by-light scattering amplitudes from lattice QCD versus dispersive sum rules
    journal, October 2018