Publications
Publication Information
| Title | Parity-violating asymmetry in the Nucleon to Delta Transition: A Study of Inelastic Scattering in the G0 Experiment |
| Authors | Carissa Capuano |
| JLAB number | JLAB-PHY-12-1484 |
| LANL number | (None) |
| Other number | DOE/OR/23177-1981 |
| Document Type(s) | (Thesis) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
|
Thesis A PHD thesis Advisor(s) : David Armstrong (College of William and Mary) | |
| Publication Abstract: | The parity-violating asymmetry arising from inelastic electron scattering at backward angle (~95 degrees) near the Delta resonance has been measured for both hydrogen and deuterium targets as part of the G0 experiment. For Q^2 = 0.34 (GeV/c)^2 and W = 1.18 GeV, the asymmetries were found to be A^H_{inel} = -33.4 ± (5.3)_stat ± (5.1)_sys ppm, A^D_{inel} = -43.6 ± (14.6)_stat ± (6.2)_sys ppm. >From the hydrogen asymmetry, the axial transition form factor, G^A_{N\Delta}, can be extracted. G^A_{N\Delta} is related to probability of the quark spin-flip that occurs as the proton transitions to the Delta. From the measured asymmetry, the form factor is found to be G^A_{N\Delta} = -0.046 ± (0.35)_stat ± (0.34)_sys ± (0.06)_theory. Though G^A_{N\Delta} has been previously studied using charged current reactions, the G0 measurement represents the first measurement of the asymmetry in the neutral weak sector. These findings agree within errors with the theoretical predictio |
| Experiment Numbers: | E04-115, E06-008 |
| Group: | Hall C |
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| DOI: | |
| Accepted Manuscript: | |
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