Study of Two-Photon Exchange via the Beam Transverse Single Spin Asymmetry in Electron-Proton Elastic Scattering at Forward Angles over a Wide Energy Range

Autor: J. Van de Wiele, M. Zambrana, S. Baunack, U. Müller, E. Schilling, F. E. Maas, M. Morlet, Y. Imai, Wouter Deconinck, C. Weinrich, R. Frascaria, Mikhail Gorchtein, J. Diefenbach, B. Gou, Harald Merkel, M. C. Mora Espí, I. Zimmermann, D. von Harrach, B. Gläser, S. Ong, R. Kunne, S. Kowalski, K. Aulenbacher, Dominik Becker, J. Arvieux, R. Kothe, E. M. Kabuß, L. Capozza, D. Balaguer Ríos

Publikováno v: Physical Review Letters
Physical Review Letters, American Physical Society, 2020, 124 (12), pp.122003. ⟨10.1103/PhysRevLett.124.122003⟩

We report on a new measurement of the beam transverse single spin asymmetry in electron-proton elastic scattering, $A^{ep}_{\perp}$, at five beam energies from 315.1 MeV to 1508.4 MeV and at a scattering angle of $30^{\circ} < \theta < 40^{\circ}$. T

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https://doi.org/10.1103/physrevlett.124.122003