New data on γ→p→→ηp with polarized photons and protons and their implications for N⁎ → Nη decays

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

Publikováno v: Physics Letters B, Vol 803, Iss , Pp - (2020)

The polarization observables T,E,P,H, and G in photoproduction of η mesons off protons are measured for photon energies from threshold to W=2400 MeV (T), 2280 MeV (E), 1620 MeV (P,H), or 1820 MeV (G), covering nearly the full solid angle. The data a

Externí odkaz: https://doaj.org/article/4c2c84f1562d41b8b55fc3368053933f

Data on Is and Ic in γ→p→pπ0π0 reveal cascade decays of N(1900) via N(1520)π

Autor: V. Sokhoyan, E. Gutz, H. van Pee, A.V. Anisovich, J.C.S. Bacelar, B. Bantes, O. Bartholomy, D. Bayadilov, R. Beck, Y. Beloglazov, R. Castelijns, V. Crede, H. Dutz, D. Elsner, R. Ewald, F. Frommberger, M. Fuchs, Ch. Funke, R. Gregor, A. Gridnev, W. Hillert, Ph. Hoffmeister, I. Horn, I. Jaegle, J. Junkersfeld, H. Kalinowsky, S. Kammer, V. Kleber, Frank Klein, Friedrich Klein, E. Klempt, M. Kotulla, B. Krusche, M. Lang, H. Löhner, I. Lopatin, S. Lugert, T. Mertens, J.G. Messchendorp, V. Metag, M. Nanova, V.A. Nikonov, D. Novinski, R. Novotny, M. Ostrick, L. Pant, M. Pfeiffer, D. Piontek, A. Roy, A.V. Sarantsev, Ch. Schmidt, H. Schmieden, S. Shende, A. Süle, V.V. Sumachev, T. Szczepanek, A. Thiel, U. Thoma, D. Trnka, R. Varma, D. Walther, Ch. Wendel, A. Wilson

Publikováno v: Physics Letters B, Vol 746, Iss , Pp 127-131 (2015)

Photoproduction of two neutral pions off the proton is studied using linearly polarized photons, and the polarization observables Is and Ic are measured for the first time. These two observables are unique to multi-meson final states; they characteri

Externí odkaz: https://doaj.org/article/3827c6d35bd3464e89cbcf646272c0f8

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

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

Publikováno v: Physical review letters. 113(6)

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::5b1cfbc10ff3c96926b879a07a068368
https://pubmed.ncbi.nlm.nih.gov/25148317

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