Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.112502
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Funding
- U.S. Department of Energy [DE-AC05-060R23177]
- National Science Foundation
- French CNRS/IN2P3
- ANR
- Direct For Mathematical & Physical Scien
- Division Of Physics [969788] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [969380] Funding Source: National Science Foundation
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We report the first measurement of the parity-violating asymmetry A(PV) in the elastic scattering of polarized electrons from Pb-208. APV is sensitive to the radius of the neutron distribution (R-n). The result A(PV) = 0.656 +/- 0.060(stat) +/- 0.014(syst) ppm corresponds to a difference between the radii of the neutron and proton distributions R-n - R-p = 0.33(-0.18)(+0.16) fm and provides the first electroweak observation of the neutron skin which is expected in a heavy, neutron-rich nucleus.
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