Strange quark contributions to parity-violating asymmetries in the backward angle G0 electron scattering experiment.
Phys Rev Lett
; 104(1): 012001, 2010 Jan 08.
Article
in En
| MEDLINE
| ID: mdl-20366359
ABSTRACT
We have measured parity-violating asymmetries in elastic electron-proton and quasielastic electron-deuteron scattering at Q2=0.22 and 0.63 GeV2. They are sensitive to strange quark contributions to currents in the nucleon and the nucleon axial-vector current. The results indicate strange quark contributions of approximately < 10% of the charge and magnetic nucleon form factors at these four-momentum transfers. We also present the first measurement of anapole moment effects in the axial-vector current at these four-momentum transfers.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2010
Type:
Article
Affiliation country:
Croatia