Skip to Main content Skip to Navigation
Journal articles

Precision Rosenbluth measurement of the proton elastic form factors

Abstract : 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.
Document type :
Journal articles
Complete list of metadatas
Contributor : Jeanine Pellet <>
Submitted on : Thursday, March 15, 2007 - 4:02:17 PM
Last modification on : Thursday, July 9, 2020 - 9:42:31 AM

Links full text




I. A. Qattan, J. Arrington, R. E. Segel, X. Zheng, K. Aniol, et al.. Precision Rosenbluth measurement of the proton elastic form factors. Physical Review Letters, American Physical Society, 2005, 94, pp.142301. ⟨10.1103/PhysRevLett.94.142301⟩. ⟨in2p3-00136885⟩



Record views