Strange Quark Contribution to the Proton Spin, from Elastic $$\vecep$$ and $$\nu p$$ Scattering
The strangeness contribution to the vector and axial form factors of the proton is presented for momentum transfers in the range 0.45 < Q{sup 2} < 1.0 GeV{sup 2}. The results are obtained via a combined analysis of forward-scattering parity-violating elastic {rvec e}p asymmetry data from the G0 and HAPPEx experiments at Jefferson Lab, and elastic {nu}p and {bar {nu}}p scattering data from Experiment 734 at Brookhaven National Laboratory. The combination of the two data sets allows for the simultaneous extraction of G{sub E}{sup s}, G{sub M}{sup s}, and G{sub A}{sup s} over a significant range of Q{sup 2} for the very first time. Determination of the strange axial form factor G{sub A}{sup s} is vital to an understanding of the strange quark contribution to the proton spin.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 899230
- Report Number(s):
- JLAB-PHY-06-609; DOE/ER/40150-4172; hep-ex/0611053; TRN: US0701932
- Resource Relation:
- Conference: 17th International Spin Physics Symposium (SPIN06), 2-7 Oct 2006, Kyoto, Japan
- Country of Publication:
- United States
- Language:
- English
Similar Records
Strange Quark Contribution to the Proton Spin, from Elastic e-vectorp and {nu}p Scattering
Strangeness contribution to the vector and axial form factors of the nucleon