HAPPEX [electronic resource] : Strange Quarks in the Proton and He4
- Published
- Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Additional Creators
- Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- HAPPEX results from our 2005 run for the parity-violating asymmetry A{sub PV} in elastic scattering of 3 GeV electrons off hydrogen and ⁴He targets at (θ{sub lab}) ≈ 6.0{sup o} are presented. The ⁴He result is A{sub PV} = (+6.40 ± 0.23 (stat) ± 0.12 (syst)) x 10⁻⁶. The hydrogen result is A{sub PV} = (-1.58 ± 0.12 (stat) ± 0.04 (syst)) x 10⁻⁶. The asymmetry for hydrogen is a linear combination of G{sub E}{sup s} and G{sub M}{sup s}, the strange quark contributions to the electric and magnetic form factors of the nucleon, respectively, and that for ⁴He is a function of G{sub E}{sup s} alone. The measurements imply G{sub E}{sup s} + 0.09 G{sub M}{sup s} = 0.007 ± 0.011 ± 0.006 at
= 0.109 GeV² and G{sub E}{sup s} = 0.002 ± 0.014 ± 0.007 at
= 0.077GeV².
- Report Numbers
- E 1.99:jlab-phy-06-584
E 1.99: doe/er/40150-4195
doe/er/40150-4195
jlab-phy-06-584 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
10/02/2006.
"jlab-phy-06-584"
" doe/er/40150-4195"
17th International Spin Physics Symposium (SPIN06), 2-7 Oct 2006, Kyoto, Japan.
Robert Michaels. - Funding Information
- AC05-84ER40150
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