Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering
Nuclear Experiment
2022-03-24 v3 High Energy Physics - Experiment
Abstract
We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q) up to 15.75~\gevsq. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q 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 and attributed to hard two-photon exchange (TPE) effects, extending to 8~(GeV/c) the range of Q 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.
Keywords
Cite
@article{arxiv.2103.01842,
title = {Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering},
author = {M. E. Christy and T. Gautam and L. Ou and B. Schmookler and Y. Wang and D. Adikaram and Z. Ahmed and H. Albataineh and S. F. Ali and B. Aljawrneh and K. Allada and S. L. Allison and S. Alsalmi and D. Androic and K. Aniol and J. Annand and J. Arrington and H. Atac and T. Averett and C. Ayerbe Gayoso and X. Bai and J. Bane and S. Barcus and K. Bartlett and V. Bellini and R. Beminiwattha and J. Bericic and H. Bhatt and D. Bhetuwal and D. Biswas and E. Brash and D. Bulumulla and C. M. Camacho and J. Campbell and A. Camsonne and M. Carmignotto and J. Castellanos and C. Chen and J-P. Chen and T. Chetry and E. Cisbani and B. Clary and E. Cohen and N. Compton and J. C. Cornejo and S. Covrig Dusa and B. Crowe and S. Danagoulian and T. Danley and W. Deconinck and M. Defurne and C. Desnault and D. Di and M. Dlamini and M. Duer and B. Duran and R. Ent and C. Fanelli and E. Fuchey and C. Gal and D. Gaskell and F. Georges and S. Gilad and O. Glamazdin and K. Gnanvo and A. V. Gramolin and V. M. Gray and C. Gu and A. Habarakada and T. Hague and G. Hamad and D. Hamilton and K. Hamilton and O. Hansen and F. Hauenstein and A. V. Hernandez and W. Henry and D. W. Higinbotham and T. Holmstrom and T. Horn and Y. Huang and G. M. Huber and C. Hyde and H. Ibrahim and N. Israel and C-M. Jen and K. Jin and M. Jones and A. Kabir and B. Karki and C. Keppel and V. Khachatryan and P. M. King and S. Li and W. Li and H. Liu and J. Liu and A. H. Liyanage and D. Mack and J. Magee and S. Malace and J. Mammei and P. Markowitz and S. Mayilyan and E. McClellan and F. Meddi and D. Meekins and K. Mesick and R. Michaels and A. Mkrtchyan and B. Moffit and R. Montgomery and L. S. Myers and P. Nadel-Turonski and S. J. Nazeer and V. Nelyubin and D. Nguyen and N. Nuruzzaman and M. Nycz and R. F. Obrecht and K. Ohanyan and C. Palatchi and B. Pandey and K. Park and S. Park and C. Peng and F. D. Persio and R. Pomatsalyuk and E. Pooser and A. J. R. Puckett and V. Punjabi and B. Quinn and S. Rahman and M. N. H. Rashad and S. Riordan and J. Roche and I. Sapkota and A. Sarty and B. Sawatzky and N. H. Saylor and M. H. Shabestari and A. Shahinyan and S. Sirca and G. R. Smith and S. Sooriyaarachchilage and N. Sparveris and R. Spies and A. Stefanko and T. Su and A. Subedi and V. Sulkosky and A. Sun and Y. Tan and L. Thorne and N. Ton and F. Tortorici and R. Trotta and R. Uniyal and G. M. Urciuoli and E. Voutier and B. Waidyawansa and B. Wojtsekhowski and S. Wood and X. Yan and L. Ye and Z. H. Ye and C. Yero and J. Zhang and Y. X. Zhao and P. Zhu},
journal= {arXiv preprint arXiv:2103.01842},
year = {2022}
}
Comments
7 pages, 2 figures