Publications
Publication Information
| Title | Precision Rosenbluth Measurement of the Proton Elastic Electromagnetic Form Factors and Their Ratio at Q^2=2.64, 3.20, and 4.10 GeV^2 |
| Authors | Issam Qattan |
| JLAB number | JLAB-PHY-05-465 |
| LANL number | nucl-ex/0610006 |
| Other number | DOE/ER/40150-3829 |
| Document Type(s) | (Thesis) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
|
Thesis A PHD thesis Advisor(s) : Ralph Segel (Northwestern University) | |
| Publication Abstract: | Due to the inconsistency in the results of the mupGEp / GMp ratio of the proton, as extracted from the Rosenbluth and recoil polarization techniques, high precision measurements of the e-p elastic scattering cross sections were made at Q^2 = 2.64, 3.20, and 4.10 GeV^2 . Protons were detected, in contrast to previous measurements where the scattered electrons were detected, which dramatically decreased " dependent systematic uncertainties and corrections. A single spectrometer measured the scattered protons of interest while simultaneous measurements at Q^2 = 0.5 GeV^2 were carried out using another spectrometer which served as a luminosity monitor in order to remove any uncertainties due to beam charge and target density uctuations. The absolute uncertainty in the measured cross sections is ~3% for both spectrometers and with relative uncertainties, random and slope, below 1% for the higher Q^2 protons, and below 1% random and 6% slope for the monitor spectrometer. The extracted electric and magnetic form factors were determined to 4%-7% for GEp and 1.5% for GMp . The ratio mupGEp / GMp was determined to 4%-7% and showed mupGEp / GMp ~ 1.0. The results of this work are in agreement with the previous Rosenbluth data and inconsistent with high-Q^2 recoil polarization results, implying a systematic difference between the two techniques. |
| Experiment Numbers: | E01-001 |
| Group: | Hall A |
| Document: | |
| DOI: | |
| Accepted Manuscript: | |
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