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Virtual Compton scattering at low energies with a positron beam

  • Regular Article - Theoretical Physics
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Abstract

The Virtual Compton scattering (VCS) process at low energies explores the electromagnetic structure of the proton in terms of generalized polarizabilities (GPs). In the one-photon exchange approximation, VCS can be accessed with exclusive photon production reactions with electron or positron beams. The extraction of the GPs from VCS with electron beam has seen substantial progress over the past two decades. Nonetheless, a consistent picture of the GPs from low to higher scales demands further investigations. Complementary measurements with positron beams offer an unique possibility, and we present an impact study of such experimental program.

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Data Availibility Statement

The manuscript has associated data in a data repository. [Authors’ comment: The data are available upon request to the authors.]

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Acknowledgements

The work of M.V. is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), in part through the Collaborative Research Center [The Low-Energy Frontier of the Standard Model, Projektnummer 204404729 - SFB 1044], and in part through the Cluster of Excellence [Precision Physics, Fundamental Interactions, and Structure of Matter] (PRISMA\(^+\) EXC 2118/1) within the German Excellence Strategy (Project ID 39083149).

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Authors and Affiliations

  1. Dipartimento di Fisica, Università degli Studi di Pavia, 27100, Pavia, Italy

    Barbara Pasquini

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, 27100, Pavia, Italy

    Barbara Pasquini

  3. Institut für Kernphysik and PRISMA+ Cluster of Excellence, Johannes Gutenberg Universität, 55099, Mainz, Germany

    Marc Vanderhaeghen

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  1. Barbara Pasquini
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  2. Marc Vanderhaeghen
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Correspondence to Barbara Pasquini.

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Communicated by Nicolas Alamanos.

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Pasquini, B., Vanderhaeghen, M. Virtual Compton scattering at low energies with a positron beam. Eur. Phys. J. A 57, 316 (2021). https://doi.org/10.1140/epja/s10050-021-00630-5

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  • DOI: https://doi.org/10.1140/epja/s10050-021-00630-5

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