2 research outputs found
Experimental constraints on the Ï ânucleus real potential
- Author
- Bantes B.(Departement Physik, UniversitÀt Basel, Switzerland)
- Bayadilov D.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Beck R.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Beloglazov Y.A.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Brinkmann K.-T.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Böse S.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Challand Th.(Departement Physik, UniversitÀt Basel, Switzerland)
- Crede V.(Department of Physics, Florida State University, Tallahassee, FL, USA)
- Dahlke T.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Dietz F.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Drexler P.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Eberhardt H.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Elsner D.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Ewald R.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Fornet-Ponse K.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Friedrich S.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Frommberger F.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Funke Ch.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Gottschall M.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Gridnev A.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- GrĂŒner M.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Gutz E.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Hammann Ch.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Hammann D.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Hannappel J.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Hartmann J.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Hillert W.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Hirenzaki S.(Department of Physics, Nara Women's University, Nara, 630-8506, Japan)
- Hoffmeister P.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Honisch Ch.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Jaegle I.(Departement Physik, UniversitÀt Basel, Switzerland)
- Kaiser D.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Kalinowsky H.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Kammer S.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Keshelashvili I.(Departement Physik, UniversitÀt Basel, Switzerland)
- Kleber V.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Klein F.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Krusche B.(Departement Physik, UniversitÀt Basel, Switzerland)
- Lang M.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Lopatin I.V.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Maghrbi Y.(Departement Physik, UniversitÀt Basel, Switzerland)
- Makonyi K.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Metag V.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- MĂŒller J.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Nagahiro H.(Department of Physics, Nara Women's University, Nara, 630-8506, Japan)
- Nanova M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Odenthal T.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Piontek D.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Rostomyan T.(Departement Physik, UniversitÀt Basel, Switzerland)
- Schaepe S.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Schmidt Ch.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Schmieden H.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Schmitz R.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Seifen T.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Thiel A.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Thoma U.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- van Pee H.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Walther D.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Weil J.(Institut fĂŒr Theoretische Physik, UniversitĂ€t GieĂen, Germany)
- Wendel Ch.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Wiedner U.(Physikalisches Institut, UniversitÀt Bochum, Germany)
- Wilson A.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Winnebeck A.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Zenke F.(Helmholtz-Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Publication venue
- Publication date
- Field of study
In a search for Ï mesic states, the production of Ï -mesons in coincidence with forward going protons has been studied in photon induced reactions on 12 C for incident photon energies of 1250â3100 MeV. The Ï0Îł pairs from decays of bound or quasi-free Ï -mesons have been measured with the CBELSA/TAPS detector system in coincidence with protons registered in the MiniTAPS forward array. Structures in the total energy distribution of the Ï0Îł pairs, which would indicate the population and decay of bound Ï 11 B states, are not observed. The Ï0Îł cross section of 0.3 nbâMeV â1 âsr â1 observed in the bound state energy regime between â100 and 0 MeV may be accounted for by yield leaking into the bound state regime because of the large in-medium width of the Ï -meson. A comparison of the measured total energy distribution with calculations suggests the real part V0 of the Ï 11 B potential to be small and only weakly attractive with V0(Ï=Ï0)=â15±35(stat)±20(syst) MeV in contrast to some theoretical predictions of attractive potentials with a depth of 100â150 MeV
The polarization observables T , P , and H and their impact on ÎłpâpÏ0 multipoles
- Author
- Anisovich A.V.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Bayadilov D.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Beck R.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Becker M.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Beloglazov Y.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- Berlin A.(Institut fĂŒr Experimentalphysik I, RuhrâUniversitĂ€t Bochum, Bochum, 44780, Germany)
- Bichow M.(Institut fĂŒr Experimentalphysik I, RuhrâUniversitĂ€t Bochum, Bochum, 44780, Germany)
- Brinkmann K.-Th.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Böse S.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Crede V.(Department of Physics, Florida State University, Tallahassee, FL, 32306, USA)
- Dieterle M.(Department Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Dutz H.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Eberhardt H.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Elsner D.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Fornet-Ponse K.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Friedrich St.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Frommberger F.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Funke Ch.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Goertz St.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Gottschall M.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Gridnev A.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- GrĂŒner M.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Gutz E.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Hammann Ch.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Hannappel J.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Hannen V.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Hartmann J.HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany
- Herick J.(Institut fĂŒr Experimentalphysik I, RuhrâUniversitĂ€t Bochum, Bochum, 44780, Germany)
- Hillert W.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Hoffmeister Ph.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Honisch Ch.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Jahn O.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Jude T.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Kaiser D.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Kalinowsky H.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Kalischewski F.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Keshelashvili I.(Department Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Klassen P.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Klein F.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Klempt E.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Koop K.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Krusche B.(Department Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Kube M.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- KÀser A.(Department Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Lang M.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Lopatin I.(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia)
- Makonyi K.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Messi F.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Metag V.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Meyer W.(Institut fĂŒr Experimentalphysik I, RuhrâUniversitĂ€t Bochum, Bochum, 44780, Germany)
- MĂŒller J.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Nanova M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, GieĂen, 35392, Germany)
- Nikonov V.(HelmholtzâInstitut fĂŒr Strahlenâund 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)
- Piontek D.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Reeve S.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Reicherz G.(Institut fĂŒr Experimentalphysik I, RuhrâUniversitĂ€t Bochum, Bochum, 44780, Germany)
- Rosenbaum Ch.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Rostomyan T.(Department Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Roth B.(Institut fĂŒr Experimentalphysik I, RuhrâUniversitĂ€t Bochum, Bochum, 44780, Germany)
- Runkel St.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Sarantsev A.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Schmidt Ch.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Schmieden H.(Physikalisches Institut, UniversitÀt Bonn, Bonn, 53115, Germany)
- Schmitz R.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Seifen T.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Sokhoyan V.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Thiel A.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Thoma U.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- ThĂ€mer Ph.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Urban M.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- van Pee H.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Walther D.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Wendel Ch.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Wiedner U.(Institut fĂŒr Experimentalphysik I, RuhrâUniversitĂ€t Bochum, Bochum, 44780, Germany)
- Wilson A.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Winnebeck A.(HelmholtzâInstitut fĂŒr Strahlenâund Kernphysik, UniversitĂ€t Bonn, Bonn, 53115, Germany)
- Witthauer L.(Department Physik, UniversitÀt Basel, Basel, 4056, Switzerland)
- Publication venue
- Publication date
- Field of study
Data on the polarization observables T , P , and H for the reaction ÎłpâpÏ0 are reported. Compared to earlier data from other experiments, our data are more precise and extend the covered range in energy and angle substantially. The results were extracted from azimuthal asymmetries measured using a transversely polarized target and linearly polarized photons. The data were taken at the Bonn electron stretcher accelerator ELSA with the CBELSA/TAPS detector. Within the Bonn-Gatchina partial wave analysis, the new polarization data lead to a significant narrowing of the error band for the multipoles for neutral-pion photoproduction