Strangeness contribution to the vector and axial form factors of the nucleon
Journal Article
·
· AIP Conference Proceedings
- Physics Department, New Mexico State University, Las Cruces NM 88003 (United States)
The strangeness contribution to the vector and axial form factors of the nucleon is presented for momentum transfers in the range 0.45 < Q2 < 1.0 GeV2. The results are obtained via a combined analysis of forward-scattering parity-violating elastic e(vector sign)p asymmetry data from the G0 and HAPPEx experiments at Jefferson Lab, and elastic vp and v(bar sign)p scattering data from Experiment 734 at Brookhaven National Laboratory. The parity-violating asymmetries measured in elastic e(vector sign)p scattering at forward angles establish a relationship between the strange vector form factors G{sub E}{sup s} and G{sub M}{sup s}, with little sensitivity to the strange axial form factor G{sub A}{sup s}. On the other hand, elastic neutrino scattering at low Q2 is dominated by the axial form factor, with still some significant sensitivity to the vector form factors as well. The combination of the two data sets allows 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 Q2 for the very first time.
- OSTI ID:
- 20873295
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 842; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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