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Article ; Online: Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering.

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

Physical review letters

2021  Volume 128, Issue 10, Page(s) 102002

Abstract: We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75  (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at ... ...

Abstract We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75  (GeV/c)^{2}. 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 or 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 >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}.
Language English
Publishing date 2021-06-18
Publishing country United States
Document type Journal Article
ZDB-ID 208853-8
ISSN 1079-7114 ; 0031-9007
ISSN (online) 1079-7114
ISSN 0031-9007
DOI 10.1103/PhysRevLett.128.102002
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