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  1. Article ; Online: Measurement of the helicity asymmetry

    Gottschall, M / Afzal, F / Anisovich, A V / Bayadilov, D / Beck, R / Bichow, M / Brinkmann, K Th / Crede, V / Dieterle, M / Dietz, F / Dutz, H / Eberhardt, H / Elsner, D / Ewald, R / Fornet-Ponse, K / Friedrich, St / Frommberger, F / Gridnev, A / Grüner, M /
    Gutz, E / Hammann, Ch / Hannappel, J / Hartmann, J / Hillert, W / Hoffmeister, Ph / Honisch, Ch / Jude, T / Kammer, S / Kalinowsky, H / Keshelashvili, I / Klassen, P / Klein, F / Klempt, E / Koop, K / Krusche, B / Kube, M / Lang, M / Lopatin, I / Mahlberg, P / Makonyi, K / Metag, V / Meyer, W / Müller, J / Müllers, J / Nanova, M / Nikonov, V / Novotny, R / Piontek, D / Reicherz, G / Rostomyan, T / Sarantsev, A / Schmidt, Ch / Schmieden, H / Seifen, T / Sokhoyan, V / Spieker, K / Thiel, A / Thoma, U / Urban, M / Pee, H van / Walther, D / Wendel, Ch / Werthmüller, D / Wiedner, U / Wilson, A / Winnebeck, A / Witthauer, L / Wunderlich, Y

    The European physical journal. A, Hadrons and nuclei

    2021  Volume 57, Issue 1, Page(s) 40

    Abstract: A measurement of the double-polarization ... ...

    Abstract A measurement of the double-polarization observable
    Language English
    Publishing date 2021-01-28
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459066-9
    ISSN 1434-601X ; 1434-6001
    ISSN (online) 1434-601X
    ISSN 1434-6001
    DOI 10.1140/epja/s10050-020-00334-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: N(1520) 3/2(-) helicity amplitudes from an energy-independent multipole analysis based on new polarization data on photoproduction of neutral pions.

    Hartmann, J / Dutz, H / Anisovich, A V / Bayadilov, D / Beck, R / Becker, M / Beloglazov, Y / Berlin, A / Bichow, M / Böse, S / Brinkmann, K-Th / Crede, V / Dieterle, M / Eberhardt, H / Elsner, D / Fornet-Ponse, K / Friedrich, St / Frommberger, F / Funke, Ch /
    Gottschall, M / Gridnev, A / Grüner, M / Gutz, E / Hammann, Ch / Hannappel, J / Hannen, V / Herick, J / Hillert, W / Hoffmeister, Ph / Honisch, Ch / Jahn, O / Jude, T / Käser, A / Kaiser, D / Kalinowsky, H / Kalischewski, F / Klassen, P / Keshelashvili, I / Klein, F / Klempt, E / Koop, K / Krusche, B / Kube, M / Lang, M / Lopatin, I / Makonyi, K / Messi, F / Metag, V / Meyer, W / Müller, J / Nanova, M / Nikonov, V / Novinski, D / Novotny, R / Piontek, D / Rosenbaum, C / Roth, B / Reicherz, G / Rostomyan, T / Sarantsev, A / Schmidt, Ch / Schmieden, H / Schmitz, R / Seifen, T / Sokhoyan, V / Thämer, Ph / Thiel, A / Thoma, U / Urban, M / van Pee, H / Walther, D / Wendel, Ch / Wiedner, U / Wilson, A / Winnebeck, A / Witthauer, L / Wunderlich, Y

    Physical review letters

    2014  Volume 113, Issue 6, Page(s) 62001

    Abstract: New data on the polarization observables T, P, and H for the reaction γp→pπ(0) are reported. The results are extracted from azimuthal asymmetries when a transversely polarized butanol target and a linearly polarized photon beam are used. The data were ... ...

    Abstract New data on the polarization observables T, P, and H for the reaction γp→pπ(0) are reported. The results are extracted from azimuthal asymmetries when a transversely polarized butanol target and a linearly polarized photon beam are used. The data were taken at the Bonn electron stretcher accelerator ELSA using the CBELSA/TAPS detector. These and earlier data are used to perform a truncated energy-independent partial wave analysis in sliced-energy bins. This energy-independent analysis is compared to the results from energy-dependent partial wave analyses.
    Language English
    Publishing date 2014-08-08
    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.113.062001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: First measurement of the helicity asymmetry for γp → pπ0 in the resonance region.

    Gottschall, M / Anisovich, A V / Bantes, B / Bayadilov, D / Beck, R / Bichow, M / Böse, S / Brinkmann, K-Th / Challand, Th / Crede, V / Dietz, F / Dutz, H / Eberhardt, H / Elsner, D / Ewald, R / Fornet-Ponse, K / Friedrich, St / Frommberger, F / Funke, Ch /
    Gridnev, A / Grüner, M / Gutz, E / Hammann, Ch / Hannappel, J / Hartmann, J / Hillert, W / Hoffmeister, Ph / Honisch, Ch / Jaegle, I / Kaiser, D / Kalinowsky, H / Kammer, S / Keshelashvili, I / Klein, F / Klempt, E / Koop, K / Krusche, B / Kube, M / Lang, M / Lopatin, I / Maghrbi, Y / Makonyi, K / Metag, V / Meyer, W / Müller, J / Nanova, M / Nikonov, V / Novotny, R / Piontek, D / Reicherz, G / Rostomyan, T / Sarantsev, A / Schaepe, St / Schmidt, Ch / Schmieden, H / Schmitz, R / Seifen, T / Sokhoyan, V / Thiel, A / Thoma, U / Urban, M / van Pee, H / Walther, D / Wendel, Ch / Wiedner, U / Wilson, A / Winnebeck, A

    Physical review letters

    2014  Volume 112, Issue 1, Page(s) 12003

    Abstract: The first measurement of the helicity dependence of the photoproduction cross section of single neutral pions off protons is reported for photon energies from 600 to 2300 MeV, covering nearly the full solid angle. The data are compared to predictions ... ...

    Abstract The first measurement of the helicity dependence of the photoproduction cross section of single neutral pions off protons is reported for photon energies from 600 to 2300 MeV, covering nearly the full solid angle. The data are compared to predictions from the SAID, MAID, and BnGa partial wave analyses. Strikingly large differences between data and predictions are observed, which are traced to differences in the helicity amplitudes of well-known and established resonances. Precise values for the helicity amplitudes of several resonances are reported.
    Language English
    Publishing date 2014-01-10
    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.112.012003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  4. Article ; Online: Thiel et al. reply:.

    Thiel, A / Anisovich, A V / Bayadilov, D / Bantes, B / Beck, R / Beloglazov, Yu / Bichow, M / Böse, S / Brinkmann, K-Th / Challand, Th / Crede, V / Dietz, F / Drexler, P / Dutz, H / Eberhardt, H / Elsner, D / Ewald, R / Fornet-Ponse, K / Friedrich, St /
    Frommberger, F / Funke, Ch / Gottschall, M / Grüner, M / Gutz, E / Hammann, Ch / Hannappel, J / Hartmann, J / Hillert, W / Hoffmeister, Ph / Honisch, Ch / Jaegle, I / Jürgensen, I / Kaiser, D / Kalinowsky, H / Kalischewski, F / Kammer, S / Keshelashvili, I / Kleber, V / Klein, F / Klempt, E / Krusche, B / Lang, M / Lopatin, I / Maghrbi, Y / Makonyi, K / Metag, V / Meyer, W / Müller, J / Nanova, M / Nikonov, V / Novotny, R / Piontek, D / Reicherz, G / Sarantsev, A / Schmidt, Ch / Schmieden, H / Seifen, T / Sokhoyan, V / Sumachev, V / Thoma, U / vanPee, H / Walther, D / Wendel, Ch / Wiedner, U / Wilson, A / Winnebeck, A / Wunderlich, Y

    Physical review letters

    2013  Volume 110, Issue 16, Page(s) 169102

    Language English
    Publishing date 2013-04-19
    Publishing country United States
    Document type Comment ; Letter
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.110.169102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  5. Article ; Online: Well-established nucleon resonances revisited by double-polarization measurements.

    Thiel, A / Anisovich, A V / Bayadilov, D / Bantes, B / Beck, R / Beloglazov, Yu / Bichow, M / Böse, S / Brinkmann, K-Th / Challand, Th / Crede, V / Dietz, F / Drexler, P / Dutz, H / Eberhardt, H / Elsner, D / Ewald, R / Fornet-Ponse, K / Friedrich, St /
    Frommberger, F / Funke, Ch / Gottschall, M / Grüner, M / Gutz, E / Hammann, Ch / Hannappel, J / Hartmann, J / Hillert, W / Hoffmeister, Ph / Honisch, Ch / Jaegle, I / Jürgensen, I / Kaiser, D / Kalinowsky, H / Kalischewski, F / Kammer, S / Keshelashvili, I / Kleber, V / Klein, F / Klempt, E / Krusche, B / Lang, M / Lopatin, I / Maghrbi, Y / Makonyi, K / Metag, V / Meyer, W / Müller, J / Nanova, M / Nikonov, V / Novotny, R / Piontek, D / Reicherz, G / Sarantsev, A / Schmidt, Ch / Schmieden, H / Seifen, T / Sokhoyan, V / Sumachev, V / Thoma, U / Vanpee, H / Walther, D / Wendel, Ch / Wiedner, U / Wilson, A / Winnebeck, A / Wunderlich, Y

    Physical review letters

    2012  Volume 109, Issue 10, Page(s) 102001

    Abstract: The first measurement is reported of the double-polarization observable G in the photoproduction of neutral pions off protons, covering the photon energy range from 620 to 1120 MeV and the full solid angle. G describes the correlation between the photon ... ...

    Abstract The first measurement is reported of the double-polarization observable G in the photoproduction of neutral pions off protons, covering the photon energy range from 620 to 1120 MeV and the full solid angle. G describes the correlation between the photon polarization plane and the scattering plane for protons polarized along the direction of the incoming photon. The observable is highly sensitive to contributions from baryon resonances. The new results are compared to the predictions from SAID, MAID, and BnGa partial wave analyses. In spite of the long-lasting efforts to understand γp→pπ(0) as the simplest photoproduction reaction, surprisingly large differences between the new data and the latest predictions are observed which are traced to different contributions of the N(1535) resonance with spin parity J(P)=1/2(-) and N(1520) with J(P)=3/2(-). In the third resonance region, where N(1680) with J(P)=5/2(+) production dominates, the new data are reasonably close to the predictions.
    Language English
    Publishing date 2012-09-07
    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.109.102001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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