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Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/288864
Title: An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab
Authors: Ilyichev, A.
Issue Date: 2021
Publisher: Springer Science and Business Media Deutschland GmbH
Citation: Eur Phys J A 2021;57(8).
Abstract: 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.
URI: https://elib.bsu.by/handle/123456789/288864
DOI: 10.1140/epja/s10050-021-00564-y
Scopus: 85113648050
Sponsorship: This article is part of a project that has received funding from the European Union’s Horizon 2020 research and innovation program under agreement STRONG - 2020 - No 824093. It is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.
Licence: info:eu-repo/semantics/openAccess
Appears in Collections:Статьи НИУ «Институт ядерных проблем»

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