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

Publication ,  Journal Article
Accardi, A; Afanasev, A; Albayrak, I; Ali, SF; Amaryan, M; Annand, JRM; Arrington, J; Asaturyan, A; Atac, H; Avakian, H; Averett, T; Bai, X ...
Published in: European Physical Journal A
August 1, 2021

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.

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Published In

European Physical Journal A

DOI

EISSN

1434-601X

ISSN

1434-6001

Publication Date

August 1, 2021

Volume

57

Issue

8

Related Subject Headings

  • Nuclear & Particles Physics
  • 5110 Synchrotrons and accelerators
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

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Accardi, A., Afanasev, A., Albayrak, I., Ali, S. F., Amaryan, M., Annand, J. R. M., … Kalicy, G. (2021). An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab. European Physical Journal A, 57(8). https://doi.org/10.1140/epja/s10050-021-00564-y
Accardi, A., A. Afanasev, I. Albayrak, S. F. Ali, M. Amaryan, J. R. M. Annand, J. Arrington, et al. “An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab.” European Physical Journal A 57, no. 8 (August 1, 2021). https://doi.org/10.1140/epja/s10050-021-00564-y.
Accardi A, Afanasev A, Albayrak I, Ali SF, Amaryan M, Annand JRM, et al. An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab. European Physical Journal A. 2021 Aug 1;57(8).
Accardi, A., et al. “An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab.” European Physical Journal A, vol. 57, no. 8, Aug. 2021. Scopus, doi:10.1140/epja/s10050-021-00564-y.
Accardi A, Afanasev A, Albayrak I, Ali SF, Amaryan M, Annand JRM, Arrington J, Asaturyan A, Atac H, Avakian H, Averett T, Gayoso CA, Bai X, Barion L, Battaglieri M, Bellini V, Beminiwattha R, Benmokhtar F, Berdnikov VV, Bernauer JC, Bertone V, Bianconi A, Biselli A, Bisio P, Blunden P, Boer M, Bondì M, Brinkmann KT, Briscoe WJ, Burkert V, Cao T, Camsonne A, Capobianco R, Cardman L, Carmignotto M, Caudron M, Causse L, Celentano A, Chatagnon P, Chen JP, Chetry T, Ciullo G, Cline E, Cole PL, Contalbrigo M, Costantini G, D’Angelo A, Darmé L, Day D, Defurne M, De Napoli M, Deur A, De Vita R, D’Hose N, Diehl S, Diefenthaler M, Dongwi B, Dupré R, Dutrieux H, Dutta D, Ehrhart M, El Fassi L, Elouadrhiri L, Ent R, Erler J, Fernando IP, Filippi A, Flay D, Forest T, Fuchey E, Fucini S, Furletova Y, Gao H, Gaskell D, Gasparian A, Gautam T, Girod FX, Gnanvo K, Grames J, Grauvogel GN, Gueye P, Guidal M, Habet S, Hague TJ, Hamilton DJ, Hansen O, Hasell D, Hattawy M, Higinbotham DW, Hobart A, Horn T, Hyde CE, Ibrahim H, Ilyichev A, Italiano A, Joo K, Joosten SJ, Khachatryan V, Kalantarians N, Kalicy G. An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab. European Physical Journal A. 2021 Aug 1;57(8).
Journal cover image

Published In

European Physical Journal A

DOI

EISSN

1434-601X

ISSN

1434-6001

Publication Date

August 1, 2021

Volume

57

Issue

8

Related Subject Headings

  • Nuclear & Particles Physics
  • 5110 Synchrotrons and accelerators
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics