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Precision Rosenbluth measurement of the proton elastic form factors

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arxiv nucl-ex/0410010 v1 pith:KFASRFXQ submitted 2004-10-08 nucl-ex

I. A. Qattan , J. Arrington , R. E. Segel , X. Zheng , K. Aniol , O. K. Baker , R. Beams , E. J. Brash
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J. Calarco A. Camsonne J.-P. Chen M. E. Christy D. Dutta R. Ent S. Frullani D. Gaskell O. Gayou R. Gilman C. Glashausser K. Hafidi J.-O. Hansen D. W. Higinbotham W. Hinton R. J. Holt G. M. Huber H. Ibrahim L. Jisonna M. K. Jones C. E. Keppel E. Kinney G. J. Kumbartzki A. Lung D. J. Margaziotis K. McCormick D. Meekins R. Michaels P. Monaghan P. Moussiegt L. Pentchev C. Perdrisat V. Punjabi R. Ransome J. Reinhold B. Reitz A. Saha A. Sarty E. C. Schulte K. Slifer P. Solvignon V. Sulkosky K. Wijesooriya B. Zeidman
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Implications of exclusive photon leptoproduction measurements for the proton charge-radius puzzle

    hep-ph 2026-07 conditional novelty 5.0 of 10

    After excluding or cutting low-|t| CLAS 2018 data, BH-dominated EP measurements yield a proton charge radius smaller than the PDG average and consistent with PRad and muonic hydrogen.

  2. Electromagnetic nucleon form factors in the extended vector meson dominance model

    hep-ph 2024-12 conditional novelty 4.0 of 10

    A six-parameter extended vector meson dominance model with four rho/omega radial excitations per channel is fitted to world data on nucleon form factors, giving a moderate but physically constrained description.

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