Abstract
We report new measurements of the parity-violating asymmetry APV in elastic scattering of 3 GeV electrons off hydrogen and He4 targets with θlab ≈ 6.0°. The He4 result is APV=(+6.40±0.23(stat) ±0.12(syst))Ã-10-6. The hydrogen result is APV=(-1.58±0.12(stat)±0.04(syst))Ã-10-6. These results significantly improve constraints on the electric and magnetic strange form factors GEs and GMs. We extract GEs=0.002±0. 014±0.007 at Q2
Original language | English (US) |
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Article number | 032301 |
Journal | Physical review letters |
Volume | 98 |
Issue number | 3 |
DOIs | |
State | Published - 2007 |