An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab

作者：Alberto Accardi, Andrei Afanasev, I. Albayrak, S.F. Ali, M. J. Amaryan, J. R. M. Annand, J. Arrington, A. Asaturyan, H. Ataç, H. Avakian, T. Averett, C. Ayerbe Gayoso, X. Bai, L. Barion, M. Battaglieri, Vincenzo Bellini, R. Beminiwattha, F. Benmokhtar, В. В. Бердников, J. C. Bernauer, Valerio Bertone, A. Bianconi, A. S. Biselli, P. Bisio, P. G. Blunden, M. Boër, M. Bondí, K.-Th. Brinkmann, W. J. Briscoe, V. D. Burkert, T. Cao, A. Camsonne, R. Capobianco, L. S. Cardman, M. Carmignotto, M. Caudron, L. Causse, A. Celentano, P. Chatagnon, J.-P. Chen, T. Chetry, G. Ciullo, E. Cline, P. L. Cole, M. Contalbrigo, G. Costantini, A. D’Angelo, Luc Darmé, Donal B. Day, M. Defurne, M. De Napoli, A. Deur, R. De Vita, N. d’Hose, S. Diehl, M. Diefenthaler, B. Dongwi, R. Dupré, Hervé Dutrieux, D. Dutta, M. Ehrhart, L. El Fassi, L. Elouadrhiri, R. Ent, Jens Erler, I. P. Fernando, A. Filippi, D. Flay, T. A. Forest, E. Fuchey, Sara Fucini, Yulia Furletova, H. Gao, D. Gaskell, A. Gasparian, T. Gautam, F. X. Girod, K. Gnanvo, Joseph Grames, G. N. Grauvogel, P. Guèye, M. Guidal, S. Habet, T. J. Hague, D. Hamilton, O. Hansen, D. Hasell, M. Hattawy, D. W. Higinbotham, A. Hobart, T. Horn, C. E. Hyde-Wright, H. Ibrahim, A. Ilyichev, A. Italiano, K. Joo, S. Joosten, V. Khachatryan, N. Kalantarians, G. Kalicy, B. Karky, D. Keller, C. Keppel, M. Kerver, M. Khandaker, A. Kim, Jungho Kim, P. M. King, E. Kinney, V. Klimenko, H. S. Ko, M. Köhl, V. Kozhuharov, Brandon Kriesten, Gordan Krnjaic, V. Kubarovsky, T. Kutz, L. Lanza, M. Leali, P. Lenisa, N. Liyanage, Q. Liu, Simonetta Liuti, J. Mammei, Sonny Mantry, D. Marchand, P. Markowitz, L. Marsicano, V. Mascagna, M. Mazouz, M. McCaughan, B. McKinnon, D. McNulty, Wally Melnitchouk, Andreas Metz, Z.-E. Meziani, S. Migliorati, M. Mihovilovič, R. Milner, A. Mkrtchyan, H. Mkrtchyan, A. Movsisyan, H. Moutarde, M. Muhoza, C. Muñoz Camacho, J. J. Murphy, P. Nadel-Turoński, Enrico Nardi, J. Nazeer, S. Niccolai, G. Niculescu, R. Novotny, J. F. Owens, M. Paolone, L. Pappalardo, R. Paremuzyan, B. Pasquini, E. Pasyuk, Tanvi Patel, Ian L. Pegg, C. Peng, D. Perera, M. Poelker, K. Price, A. J. R. Puckett, M. Raggi, N. Randazzo, M. N. H. Rashad, Malinga Rathnayake, B. A. Raue, P. E. Reimer, Matteo Rinaldi, A. Rizzo, Y. Roblin, J. Roche, G. Ron, F. Sabatié, G. Salmè, E. Santopinto, R. Santos Estrada, B. Sawatzky, A. Schmidt, P. Schweitzer, Sergio Scopetta, V. Sergeyeva, M. Shabestari, A. Shahinyan, Y. G. Sharabian, S. Širca, E. S. Smith, D. Sokhan, A. Somov, N. Sparveris, M. Spata, H. Spiesberger, M. Spreafico, S. Stepanyan, P. Stoler, I. I. Strakovsky, R. Suleiman, M. Suresh, P. Sznajder, Holly Szumila-Vance, V. Tadevosyan, A.S. Tadepalli, A. W. Thomas, Michael Tiefenback, R. Trotta, M. Ungaro, P. Valente, Marc Vanderhaeghen, L. Venturelli, H. Voskanyan, E. Voutier, B. Wojtsekhowski, M. H. Wood, S. A. Wood, Ju-Jun Xie, Weizhi Xiong, Z. Ye, M. Yurov, H.-G. Zaunick, S. Zhamkochyan, J. Zhang, S. Zhang, Shengying Zhao, B. Zhao, Xiaochao Zheng, Jingyi Zhou, C. Zorn · 发表于：Institutional Research Information System University of Ferrara (University of Ferrara) · 年份：2021 · DOI：10.1140/epja/s10050-021-00564-y · 被引用次数：43 · 研究领域：Muon and positron interactions and applications、Particle accelerators and beam dynamics、Particle Accelerators and Free-Electron Lasers

Positron beams, both polarized and unpolarized, are identified as important ingredients for the experimental programs at the next generation of lepton accelerators. In the context of the hadronic physics program at Jefferson Lab (JLab), positron beams are complementary, even essential, tools for a precise understanding of the electromagnetic structure of nucleons and nuclei, in both the elastic and deep-inelastic regimes. For instance, elastic scattering of polarized and unpolarized electrons and positrons from the nucleon enables a model independent determination of its electromagnetic form factors. Also, the deeply-virtual scattering of polarized and unpolarized electrons and positrons allows unambiguous separation of the different contributions to the cross section of the lepto-production of photons and of lepton-pairs, enabling an accurate determination of the nucleons and nuclei generalized parton distributions, and providing an access to the gravitational form factors of the energy-momentum tensor. Furthermore, positron beams offer the possibility of alternative tests of the Standard Model of particle physics through the search of a dark photon, the precise measurement of electroweak couplings, and the investigation of charged lepton flavor violation. This document discusses the perspectives of an experimental program with high duty-cycle positron beams at JLab.