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  1. AU="Ríos, D Balaguer"
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  1. Article ; Online: 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.

    Gou, B / Arvieux, J / Aulenbacher, K / Ríos, D Balaguer / Baunack, S / Becker, D / Capozza, L / Deconinck, W / Diefenbach, J / Frascaria, R / Gorchtein, M / Gläser, B / von Harrach, D / Imai, Y / Kabuß, E-M / Kothe, R / Kowalski, S / Kunne, R / Maas, F E /
    Merkel, H / Espí, M C Mora / Morlet, M / Müller, U / Ong, S / Schilling, E / Weinrich, C / van de Wiele, J / Zambrana, M / Zimmermann, I

    Physical review letters

    2020  Volume 124, Issue 12, Page(s) 122003

    Abstract: We report on a new measurement of the beam transverse single spin asymmetry in electron-proton elastic scattering, A_{⊥}^{ep}, at five beam energies from 315.1 to 1508.4 MeV and at a scattering angle of 30°<θ<40°. The covered Q^{2} values are 0.032, 0 ... ...

    Abstract We report on a new measurement of the beam transverse single spin asymmetry in electron-proton elastic scattering, A_{⊥}^{ep}, at five beam energies from 315.1 to 1508.4 MeV and at a scattering angle of 30°<θ<40°. The covered Q^{2} values are 0.032, 0.057, 0.082, 0.218, 0.613 (GeV/c)^{2}. The measurement clearly indicates significant inelastic contributions to the two-photon-exchange (TPE) amplitude in the low-Q^{2} kinematic region. No theoretical calculation is able to reproduce our result. Comparison with a calculation based on unitarity, which only takes into account elastic and πN inelastic intermediate states, suggests that there are other inelastic intermediate states such as ππN, KΛ, and ηN. Covering a wide energy range, our new high-precision data provide a benchmark to study those intermediate states.
    Language English
    Publishing date 2020-04-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.124.122003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: New Measurements of the Beam Normal Spin Asymmetries at Large Backward Angles with Hydrogen and Deuterium Targets.

    Ríos, D Balaguer / Aulenbacher, K / Baunack, S / Diefenbach, J / Gläser, B / von Harrach, D / Imai, Y / Kabuß, E-M / Kothe, R / Lee, J H / Merkel, H / Mora Espí, M C / Müller, U / Schilling, E / Weinrich, C / Capozza, L / Maas, F E / Arvieux, J / El-Yakoubi, M A /
    Frascaria, R / Kunne, R / Morlet, M / Ong, S / van de Wiele, J / Kowalski, S / Prok, Y

    Physical review letters

    2017  Volume 119, Issue 1, Page(s) 12501

    Abstract: New measurements of the beam normal single spin asymmetry in the electron elastic and quasielastic scattering on the proton and deuteron, respectively, at large backward angles and at ⟨Q^{2}⟩=0.22  (GeV/c)^{2} and ⟨Q^{2}⟩=0.35  ( GeV/c)^{2} are reported. ...

    Abstract New measurements of the beam normal single spin asymmetry in the electron elastic and quasielastic scattering on the proton and deuteron, respectively, at large backward angles and at ⟨Q^{2}⟩=0.22  (GeV/c)^{2} and ⟨Q^{2}⟩=0.35  ( GeV/c)^{2} are reported. The experimentally observed asymmetries are compared with the theoretical calculation of Pasquini and Vanderhaeghen [Phys. Rev. C 70, 045206 (2004).PRVCAN0556-281310.1103/PhysRevC.70.045206]. The agreement of the measurements with the theoretical calculations shows a dominance of the inelastic intermediate excited states of the nucleon, πN and the Δ resonance. The measurements explore a new, important parameter region of the exchanged virtual photon virtualities.
    Language English
    Publishing date 2017-07-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.119.012501
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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