Measurements of the electric and magnetic form factors of the proton from Q2=1.75 to 8.83 (GeV/c)2

P. E. Bosted*, L. Andivahis, A. Lung, L. M. Stuart, J. Alster, R. G. Arnold, C. C. Chang, F. S. Dietrich, W. Dodge, R. Gearhart, J. Gomez, K. A. Griffioen, R. S. Hicks, C. E. Hyde-Wright, C. Keppel, S. E. Kuhn, J. Lichtenstadt, R. A. Miskimen, G. A. Peterson, G. G. PetratosS. E. Rock, S. Rokni, W. K. Sakumoto, M. Spengos, K. Swartz, Z. Szalata, L. H. Tao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The proton elastic electric and magnetic form factors, GEp(Q2) and GMp(Q2), have been separately measured in the range Q2=1.75 to 8.83 (GeV/c)2, more than doubling the Q2 range of previous data. Scaled by the dipole fit, GD(Q2), the results for GMp(Q2)/pGD(Q2) decrease smoothly from 1.05 to 0.91, while GEp(Q2)/GD(Q2) is consistent with unity. Comparisons are made to QCD sum rule, diquark, constitutent quark, and vector meson dominance models, none of which agree with all of the new data. The ratio Q2F2/F1 approaches a constant value for Q2>3 (GeV/c)2.

Original languageEnglish
Pages (from-to)3841-3844
Number of pages4
JournalPhysical Review Letters
Volume68
Issue number26
DOIs
StatePublished - 1992

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