2 research outputs found
Data on Is and Ic in ÎłâpâpÏ0Ï0 reveal cascade decays of N(1900) via N(1520)Ï
- Author
- Anisovich A.V.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Bacelar J.C.S.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Bantes B.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Bartholomy O.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Bayadilov D.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Beck R.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Beloglazov Y.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- Castelijns R.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Crede V.(Department of Physics, Florida State University, Tallahassee, FL, 32306, USA)
- Dutz H.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Elsner D.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Ewald R.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Frommberger F.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Fuchs M.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Funke Ch.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Gregor R.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Gridnev A.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- Gutz E.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Hillert W.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Hoffmeister Ph.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Horn I.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Jaegle I.(Departement Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Junkersfeld J.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Kalinowsky H.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Kammer S.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Kleber V.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Klein Frank(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Klein Friedrich(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Klempt E.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Kotulla M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Krusche B.(Departement Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Lang M.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Lopatin I.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- Lugert S.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Löhner H.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Mertens T.(Departement Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Messchendorp J.G.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Metag V.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Nanova M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Nikonov V.A.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Novinski D.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- Novotny R.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Ostrick M.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Pant L.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Pfeiffer M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Piontek D.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Roy A.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Sarantsev A.V.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Schmidt Ch.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Schmieden H.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Shende S.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Sokhoyan V.HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany
- Sumachev V.V.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- Szczepanek T.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- SĂŒle A.(Physikalisches Institut, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Thiel A.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Thoma U.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Trnka D.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- van Pee H.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Varma R.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Walther D.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Wendel Ch.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Wilson A.(HelmholtzâInstitut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Publication venue
- Publication date
- Field of study
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 characterize correlations between the linear photon polarization and the direction of outgoing single particles in photoproduction of three-body final states. The Is and Ic distributions suggest that, in the 1.8 to 2.0 GeV mass region, the N(1520)3/2âÏ intermediate state is reached with reaction dynamics consistent with a dominant JP=3/2+ wave. These data are included in the BonnâGatchina (BnGa) partial wave analysis which is based on a large variety of data; the analysis confirms a significant contribution from the reaction chain ÎłpâN(1900)3/2+âN(1520)3/2âÏ0âpÏ0Ï0
Photoproduction of Ï mesons off the proton
- Author
- Anisovich A.V.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Bacelar J.C.S.(KVI, Groningen, 9747 AA, The Netherlands)
- Bantes B.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Bartholomy O.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Bayadilov D.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Beck R.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Beloglazov Y.A.(Petersburg Nuclear Physics Institute, Gatchina, RU-188350, Russia)
- Brinkmann K.T.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Castelijns R.(KVI, Groningen, 9747 AA, The Netherlands)
- Crede V.(Department of Physics, Florida State University, Tallahassee, FL, 32306, USA)
- Dutz H.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Elsner D.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Ewald R.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Frommberger F.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Fuchs M.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Funke Chr.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Gregor R.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Gridnev A.(Petersburg Nuclear Physics Institute, Gatchina, RU-188350, Russia)
- Gutz E.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Hannappel J.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Hillert W.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Hoffmeister P.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Horn I.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Jaegle I.(Physikalisches Institut, UniversitÀt Basel, Basel, CH-4056, Switzerland)
- Jude T.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Junkersfeld J.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Kalinowsky H.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Kleber V.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Klein Frank(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Klein Friedrich(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Klempt E.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Kotulla M.(Physikalisches Institut, UniversitÀt Basel, Basel, CH-4056, Switzerland)
- Krusche B.(Physikalisches Institut, UniversitÀt Basel, Basel, CH-4056, Switzerland)
- Lang M.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Lopatin I.V.(Petersburg Nuclear Physics Institute, Gatchina, RU-188350, Russia)
- Lugert S.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Löhner H.(KVI, Groningen, 9747 AA, The Netherlands)
- Mertens T.(Physikalisches Institut, UniversitÀt Basel, Basel, CH-4056, Switzerland)
- Messchendorp J.G.(KVI, Groningen, 9747 AA, The Netherlands)
- Metag V.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Nanova M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Nikonov V.A.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Novinski D.(Petersburg Nuclear Physics Institute, Gatchina, RU-188350, Russia)
- Novotny R.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Ostrick M.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Pant L.M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Pfeiffer M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Roy A.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Sarantsev A.V.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Schmidt C.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Schmieden H.(Physikalisches Institut, UniversitÀt Bonn, Bonn, D-53115, Germany)
- Shende S.(KVI, Groningen, 9747 AA, The Netherlands)
- Sokhoyan V.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Sparks N.(Department of Physics, Florida State University, Tallahassee, FL, 32306, USA)
- Sumachev V.V.(Petersburg Nuclear Physics Institute, Gatchina, RU-188350, Russia)
- Szczepanek T.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- SĂŒle A.(Physikalisches Institut, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Thoma U.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Trnka D.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- van Pee H.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Varma R.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, D-35392, Germany)
- Walther D.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Wendel Ch.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany)
- Wiedner U.(Institut fĂŒr Experimentalphysik I, Ruhr-UniversitĂ€t Bochum, Bochum, D-44780, Germany)
- Wilson A.Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Bonn, D-53115, Germany
- Publication venue
- Publication date
- Field of study
The differential cross sections and unpolarized spin-density matrix elements for the reaction ÎłpâpÏ were measured using the CBELSA/TAPS experiment for initial photon energies ranging from the reaction threshold to 2.5 GeV. These observables were measured from the radiative decay of the Ï meson, ÏâÏ0Îł . The cross sections cover the full angular range and show the full extent of the t -channel forward rise. The overall shape of the angular distributions in the differential cross sections and unpolarized spin-density matrix elements are in fair agreement with previous data. In addition, for the first time, a beam of linearly-polarized tagged photons in the energy range from 1150 MeV to 1650 MeV was used to extract polarized spin-density matrix elements