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Title: Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass

Abstract

We propose lattice QCD calculations of nucleon electromagnetic form factors using pion masses mπ = 149, 202, and 254 MeV and an action with clover-improved Wilson quarks coupled to smeared gauge fields, as used by the Budapest-Marseille-Wuppertal Collaboration. Particular attention is paid to the removal of the effects of excited-state contamination by calculations at three source-sink separations and the use of the summation and generalized pencil-of-function methods. The combination of a calculation at the nearly physical mass mπ = 149 MeV in a large spatial volume (mπLs = 4.2) and the removal of excited-state effects yields agreement with experiment for the electric and magnetic form factors GE(Q2) and GM(Q2) up to Q2 = 0.5 GeV2.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Mainz, Mainz (Germany)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. New Mexico State Univ., Las Cruces, NM (United States)
  5. Univ. of Wuppertal, Wuppertal, North Rhine-Westphalia (Germany)
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); New Mexico State Univ., Las Cruces, NM (United States); Univ. of California, Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1505598
Alternate Identifier(s):
OSTI ID: 1181557
Grant/Contract Number:  
FG02-94ER40818; AC02-06CH11357; FG02-96ER40965
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 90; Journal Issue: 7; 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, J. R., Negele, J. W., Pochinsky, A. V., Syritsyn, S. N., Engelhardt, M., and Krieg, S. Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass. United States: N. p., 2014. Web. doi:10.1103/physrevd.90.074507.
Green, J. R., Negele, J. W., Pochinsky, A. V., Syritsyn, S. N., Engelhardt, M., & Krieg, S. Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass. United States. doi:10.1103/physrevd.90.074507.
Green, J. R., Negele, J. W., Pochinsky, A. V., Syritsyn, S. N., Engelhardt, M., and Krieg, S. Fri . "Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass". United States. doi:10.1103/physrevd.90.074507. https://www.osti.gov/servlets/purl/1505598.
@article{osti_1505598,
title = {Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass},
author = {Green, J. R. and Negele, J. W. and Pochinsky, A. V. and Syritsyn, S. N. and Engelhardt, M. and Krieg, S.},
abstractNote = {We propose lattice QCD calculations of nucleon electromagnetic form factors using pion masses mπ = 149, 202, and 254 MeV and an action with clover-improved Wilson quarks coupled to smeared gauge fields, as used by the Budapest-Marseille-Wuppertal Collaboration. Particular attention is paid to the removal of the effects of excited-state contamination by calculations at three source-sink separations and the use of the summation and generalized pencil-of-function methods. The combination of a calculation at the nearly physical mass mπ = 149 MeV in a large spatial volume (mπLs = 4.2) and the removal of excited-state effects yields agreement with experiment for the electric and magnetic form factors GE(Q2) and GM(Q2) up to Q2 = 0.5 GeV2.},
doi = {10.1103/physrevd.90.074507},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 7,
volume = 90,
place = {United States},
year = {2014},
month = {10}
}

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Cited by: 29 works
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