An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab
Abstract
Positron beams, both polarized and unpolarized, are identified as essential 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. 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.
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Cite
@article{arxiv.2007.15081,
title = {An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab},
author = {A. Accardi and A. Afanasev and I. Albayrak and S. F. Ali and M. Amaryan and J. R. M. Annand and J. Arrington and A. Asaturyan and H. Atac and H. Avakian and T. Averett and C. Ayerbe Gayoso and X. Bai and L. Barion and M. Battaglieri and V. Bellini and R. Beminiwattha and F. Benmokhtar and V. V. Berdnikov and J. C. Bernauer and V. Bertone and A. Bianconi and A. Biselli and P. Bisio and P. Blunden and M. Boer and M. Bondì and K. -T. Brinkmann and W. J. Briscoe and V. Burkert and T. Cao and A. Camsonne and R. Capobianco and L. Cardman and M. Carmignotto and M. Caudron and L. Causse and A. Celentano and P. Chatagnon and J. -P. Chen and T. Chetry and G. Ciullo and E. Cline and P. L. Cole and M. Contalbrigo and G. Costantini and A. D'Angelo and L. Darmé and D. Day and M. Defurne and M. De Napoli and A. Deur and R. De Vita and N. D'Hose and S. Diehl and M. Diefenthaler and B. Dongwi and R. Dupré and H. Dutrieux and D. Dutta and M. Ehrhart and L. El Fassi and L. Elouadrhiri and R. Ent and J. Erler and I. P. Fernando and A. Filippi and D. Flay and T. Forest and E. Fuchey and S. Fucini and Y. Furletova and H. Gao and D. Gaskell and A. Gasparian and T. Gautam and F. -X. Girod and K. Gnanvo and J. Grames and G. N. Grauvoge and P. Gueye and M. Guidal and S. Habet and T. J. Hague and D. J. Hamilton and O. Hansen and D. Hasell and M. Hattawy and D. W. Higinbotham and A. Hobart and T. Horn and C. E. Hyde and H. Ibrahim and A. Ilyichev and A. Italiano and K. Joo and S. J. Joosten and V. Khachatryan and N. Kalantarians and G. Kalicy and B. Karky and D. Keller and C. Keppel and M. Kerver and M. Khandaker and A. Kim and J. Kim and P. M. King and E. Kinney and V. Klimenko and H. -S. Ko and M. Kohl and V. Kozhuharov and B. T. Kriesten and G. Krnjaic and V. Kubarovsky and T. Kutz and L. Lanza and M. Leali and P. Lenisa and N. Liyanage and Q. Liu and S. Liuti and J. Mammei and S. Mantry and D. Marchand and P. Markowitz and L. Marsicano and V. Mascagna and M. Mazouz and M. McCaughan and B. McKinnon and D. McNulty and W. Melnitchouk and A. Metz and Z. -E. Meziani and S. Migliorati and M. Mihovilovic and R. Milner and A. Mkrtchyan and H. Mkrtchyan and A. Movsisyan and H. Moutarde and M. Muhoza and C. Muñoz Camacho and J. Murphy and P. Nadel-Turonski and E. Nardi and J. Nazeer and S. Niccolai and G. Niculescu and R. Novotny and J. F. Owens and M. Paolone and L. Pappalardo and R. Paremuzyan and B. Pasquini and E. Pasyuk and T. Patel and I. Pegg and C. Peng and D. Perera and M. Poelker and K. Price and A. J. R. Puckett and M. Raggi and N. Randazzo and M. N. H. Rashad and M. Rathnayake and B. Raue and P. E. Reimer and M. Rinaldi and A. Rizzo and Y. Roblin and J. Roche and O. Rondon-Aramayo and F. Sabatié and G. Salmè and E. Santopinto and R. Santos Estrada and B. Sawatzky and A. Schmidt and P. Schweitzer and S. Scopetta and V. Sergeyeva and M. Shabestari and A. Shahinyan and Y. Sharabian and S. Širca and E. S. Smith and D. Sokhan and A. Somov and N. Sparveris and M. Spata and H. Spiesberger and M. Spreafico and S. Stepanyan and P. Stoler and I. Strakovsky and R. Suleiman and M. Suresh and P. Sznajder and H. Szumila-Vance and V. Tadevosyan and A. S. Tadepalli and A. W. Thomas and M. Tiefenback and R. Trotta and M. Ungaro and P. Valente and M. Vanderhaeghen and L. Venturelli and H. Voskanyan and E. Voutier and B. Wojtsekhowski and M. H. Wood and S. Wood and J. Xie and W. Xiong and Z. Ye and M. Yurov and H. -G. Zaunick and S. Zhamkochyan and J. Zhang and S. Zhang and S. Zhao and Z. W. Zhao and X. Zheng and J. Zhou and C. Zorn},
journal= {arXiv preprint arXiv:2007.15081},
year = {2021}
}
Comments
18 pages, 7 figures This version superseeds the previous version which scientific content was decomposed into several more elaborated articles. All of these articles will be collected in the EPJ A Topical Issue about "Positron beam and physics at Jefferson Lab (e+@Jlab)"