Recoil polarization measurements of the proton electromagnetic form factor ratio to Q<sup>2</sup>=8.5 GeV<sup>2</sup>
- Puckett, A. J. R.
- Brash, E. J.
- Jones, M. K.
- Luo, W.
- Meziane, M.
- Pentchev, L.
- Perdrisat, C. F.
- Punjabi, V.
- Wesselmann, F. R.
- Ahmidouch, A.
- Albayrak, I.
- Aniol, K. A.
- Arrington, J.
- Asaturyan, A.
- Baghdasaryan, H.
- Benmokhtar, F.
- Bertozzi, W.
- Bimbot, L.
- Bosted, P.
- Boeglin, W.
- Butuceanu, C.
- Carter, P.
- Chernenko, S.
- Christy, E.
- Commisso, M.
- Cornejo, J. C.
- Covrig, S.
- Danagoulian, S.
- Daniel, A.
- Davidenko, A.
- Day, D.
- Dhamija, S.
- Dutta, D.
- Ent, R.
- Frullani, S.
- Fenker, H.
- Frlez, E.
- Garibaldi, F.
- Gaskell, D.
- Gilad, S.
- Gilman, R.
- Goncharenko, Y.
- Hafidi, K.
- Hamilton, D.
- Higinbotham, D. W.
- Hinton, W.
- Horn, T.
- Hu, B.
- Huang, J.
- Huber, G. M.
- Jensen, E.
- Keppel, C.
- Khandaker, M.
- King, P.
- Kirillov, D.
- Kohl, M.
- Kravtsov, V.
- Kumbartzki, G.
- Li, Y.
- Mamyan, V.
- Margaziotis, D. J.
- Marsh, A.
- Matulenko, Y.
- Maxwell, J.
- Mbianda, G.
- Meekins, D.
- Melnik, Y.
- Miller, J.
- Mkrtchyan, A.
- Mkrtchyan, H.
- Moffit, B.
- Moreno, O.
- Mulholland, J.
- Narayan, A.
- Nedev, S.
- Nuruzzaman,
- Piasetzky, E.
- Pierce, W.
- Piskunov, N. M.
- Prok, Y.
- Ransome, R. D.
- Razin, D. S.
- Reimer, P.
- Reinhold, J.
- Rondon, O.
- Shabestari, M.
- Shahinyan, A.
- Shestermanov, K.
- Širca, S.
- Sitnik, I.
- Smykov, L.
- Smith, G.
- Solovyev, L.
- Solvignon, P.
- Subedi, R.
- Tomasi-Gustafsson, E.
- Vasiliev, A.
- Veilleux, M.
- Wojtsekhowski, B. B.
- Wood, S.
- Ye, Z.
- Zanevsky, Y.
- Zhang, X.
- Zhang, Y.
- Zheng, X.
- Zhu, L.
DOIAbstract
Among the most fundamental observables of nucleon structure, electromagnetic form factors are a crucial benchmark for modern calculations describing the strong interaction dynamics of the nucleon’s quark constituents; indeed, recent proton data have attracted intense theoretical interest. In this Letter, we report new measurements of the proton electromagnetic form factor ratio using the recoil polarization method, at momentum transfers Q<sup>2</sup>=5.2, 6.7, and 8.5 GeV<sup>2</sup>. By extending the range of Q<sup>2</sup> for which GpE is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the nonperturbative regime
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