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Title: Strange quarks in the nucleon sea: Results from HAPPEX II

The HAPPEX Collaboration measured parity-violating electron scattering from 4He(e, e) and H(e, e) in 2004 and 2005 for Q2 ≤ 0.11 GeV2. Results for the strange-quark contributions to the electromagnetic form factors of the nucleon from the 2004 data will be reviewed. Preliminary results from the 2005 data, which have significantly greater statistical precision, are GsE = 0.004 0.014stat 0.013syst for Q2 = 0.0772 GeV2 from the helium data and GsE + 0.088 GsM = 0.004 0.011stat 0.005syst 0.004FF for Q2 = 0.1089 GeV2 from the hydrogen data.
Authors:
;
Publication Date:
OSTI Identifier:
912938
Report Number(s):
JLAB-PHY-07-690; DOE/ER/40150-4300
TRN: US200802%%471
DOE Contract Number:
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Journal Name: Eur. Phys. J. A; Journal Volume: 31; Conference: 4th International Conference On Quarks And Nuclear Physics (QNP06), 5-10 Jun 2006, Madrid, Spain
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org:
USDOE - Office of Energy Research (ER)
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; ACCURACY; ELECTROMAGNETIC FORM FACTORS; ELECTRONS; HELIUM; HYDROGEN; NUCLEAR PHYSICS; NUCLEONS; QUARKS; SCATTERING