Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2004-10-08
Phys.Rev.Lett.94:142301,2005
Physics
Nuclear Physics
Nuclear Experiment
5 pages, 3 figures, submitted to PRL
Scientific paper
10.1103/PhysRevLett.94.142301
We report the results of a new Rosenbluth measurement of the proton form factors at Q^2 values of 2.64, 3.20 and 4.10 GeV^2. Cross sections were determined by detecting the recoiling proton in contrast to previous measurements in which the scattered electron was detected. At each Q^2, relative cross sections were determined to better than 1%. The measurement focussed on the extraction of G_E/G_M which was determined to 4-8% and found to approximate form factor scaling, i.e. \mu_p G_E \approx G_M. These results are consistent with and much more precise than previous Rosenbluth extractions. However, they are inconsistent with recent polarization transfer measurements of comparable precision, implying a systematic difference between the two techniques.
Aniol K.
Arrington John
Baker Oliver K.
Beams Ryan
Brash E. J.
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