Journal
PHYSICAL REVIEW D
Volume 101, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.101.031501
Keywords
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Funding
- U.S. National Science Foundation [PHY-1714407]
- Cyprus Research Promotion foundation [POST-DOC/0718/0100, COMPLEMENTARY/0916/0015]
- European commission [642069]
- Swiss National Supercomputing Centre (CSCS) [s702]
- National Science Foundation [1625061, TG-PHY170022]
- US Army Research Laboratory [W911NF-16-2-0189]
- Jureca system of the research center in Julich [ECY00]
- Leibniz Supercomputing Centre under the Gauss Centre for Supercomputing e.V. [pr74yo]
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We determine the strange electromagnetic form factors of the nucleon within the lattice formulation of quantum chromodynamics using simulations that include light, strange and charm quarks in the sea all tuned to their physical mass values. We employ state-of-the-art techniques to accurately extract the form factors for values of the momentum transfer square up to 0.8 GeV2. We find that both the electric and magnetic form factors are statistically nonzero. We obtain for the strange magnetic moment mu(s) = -0.017(4)(+1 0)(+5 0), the strange magnetic radius < r(M)(2)>(s) is = -0.015(9)(+3 0)(+4 0) fm(2), and the strange charge radius < r(E)(2)>(s) = -0.0048(6)(0 -8)(+12 0) fm(2), where the first error is statistical, and the second and third systematic.
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