Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering
Creators: name: Christy, M. E.
name: Gautam, T.
name: Ou, L.
name: Schmookler, B.
name: Wang, Y.
name: Adikaram, D.
name: Ahmed, Z.
name: Albataineh, H.
name: Ali, S. F.
name: Aljawrneh, B.
name: Allada, K.
name: Allison, S. L.
name: Alsalmi, S.
name: Androic, D.
name: Aniol, K.
name: Annand, J.
name: Arrington, J.
name: Atac, H.
name: Averett, T.
name: Gayoso, C. Ayerbe
name: Bai, X.
name: Bane, J.
name: Barcus, S.
name: Bartlett, K.
name: Bellini, V.
name: Beminiwattha, R.
name: Bericic, J.
name: Bhatt, H.
name: Bhetuwal, D.
name: Biswas, D.
name: Brash, E.
name: Bulumulla, D.
name: Camacho, C. M.
name: Campbell, J.
name: Camsonne, A.
name: Carmignotto, M.
name: Castellanos, J.
name: Chen, C.
name: Chen, J-P.
name: Chetry, T.
name: Cisbani, E.
name: Clary, B.
name: Cohen, E.
name: Compton, N.
name: Cornejo, J. C.
name: Dusa, S. Covrig
name: Crowe, B.
name: Danagoulian, S.
name: Danley, T.
name: Deconinck, W.
name: Defurne, M.
name: Desnault, C.
name: Di, D.
name: Dlamini, M.
name: Duer, M.
name: Duran, B.
name: Ent, R.
name: Fanelli, C.
name: Fuchey, E.
name: Gal, C.
name: Gaskell, D.
name: Georges, F.
name: Gilad, S.
name: Glamazdin, O.
name: Gnanvo, K.
name: Gramolin, A. V.
name: Gray, V. M.
name: Gu, C.
name: Habarakada, A.
name: Hague, T.
name: Hamad, G.
name: Hamilton, D.
name: Hamilton, K.
name: Hansen, O.
name: Hauenstein, F.
name: Hernandez, A. V.
name: Henry, W.
name: Higinbotham, D. W.
name: Holmstrom, T.
name: Horn, T.
name: Huang, Y.
name: Huber, G. M.
name: Hyde, C.
name: Ibrahim, H.
name: Israel, N.
name: Jen, C-M.
name: Jin, K.
name: Jones, M.
name: Kabir, A.
name: Karki, B.
name: Keppel, C.
name: Khachatryan, V.
name: King, P. M.
name: Li, S.
name: Li, W.
name: Liu, H.
name: Liu, J.
name: Liyanage, A. H.
name: Mack, D.
name: Magee, J.
name: Malace, S.
name: Mammei, J.
name: Markowitz, P.
name: Mayilyan, S.
name: McClellan, E.
name: Meddi, F.
name: Meekins, D.
name: Mesick, K.
name: Michaels, R.
name: Mkrtchyan, A.
name: Moffit, B.
name: Montgomery, R.
name: Myers, L. S.
name: Nadel-Turonski, P.
name: Nazeer, S. J.
name: Nelyubin, V.
name: Nguyen, D.
name: Nuruzzaman, N.
name: Nycz, M.
name: Obrecht, R. F.
name: Ohanyan, K.
name: Palatchi, C.
name: Pandey, B.
name: Park, K.
name: Park, S.
name: Peng, C.
name: Persio, F. D.
name: Pomatsalyuk, R.
name: Pooser, E.
name: Puckett, A. J. R.
name: Punjabi, V.
name: Quinn, B.
name: Rahman, S.
name: Rashad, M. N. H.
name: Riordan, S.
name: Roche, J.
name: Sapkota, I.
name: Sarty, A.
name: Sawatzky, B.
name: Saylor, N. H.
name: Shabestari, M. H.
name: Shahinyan, A.
name: Sirca, S.
name: Smith, G. R.
name: Sooriyaarachchilage, S.
name: Sparveris, N.
name: Spies, R.
name: Stefanko, A.
name: Su, T.
name: Subedi, A.
name: Sulkosky, V.
name: Sun, A.
name: Tan, Y.
name: Thorne, L.
name: Ton, N.
name: Tortorici, F.
name: Trotta, R.
name: Uniyal, R.
name: Urciuoli, G. M.
name: Voutier, E.
name: Waidyawansa, B.
name: Wojtsekhowski, B.
name: Wood, S.
name: Yan, X.
name: Ye, L.
name: Ye, Z. H.
name: Yero, C.
name: Zhang, J.
name: Zhao, Y. X.
name: Zhu, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q$^2$) up to 15.75~\gevsq. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q$^2$ and double the range over which a longitudinal/transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q$^2$ and attributed to hard two-photon exchange (TPE) effects, extending to 8~(GeV/c)$^2$ the range of Q$^2$ for which a discrepancy is established at $&gt;$95\% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q$^2$.
description: 7 pages, 2 figures