5 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
Measurement of polarisation observables in Ks0ÎŁ+ photoproduction off the proton
- Author
- Anisovich A.V.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Bantes B.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Bartholomy O.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- 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.(Petersburg Nuclear Physics Institute, Gatchina, Russia)
- Brinkmann K.-T.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Crede V.(Department of Physics, Florida State University, Tallahassee, USA)
- Dutz 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)
- Frommberger F.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Funke Ch.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Gridnev A.B.(Petersburg Nuclear Physics Institute, Gatchina, Russia)
- Gutz E.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Hannappel J.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Hillert W.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Hoffmeister P.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Jaegle I.(Departement Physik, UniversitÀt Basel, Switzerland)
- Jahn O.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Jude T.C.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Junkersfeld J.(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)
- Kleber V.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Klein Frank(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Klein Friedrich(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Klempt E.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Krusche B.(Departement Physik, UniversitÀt Basel, Switzerland)
- Lang M.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Lopatin I.V.(Petersburg Nuclear Physics Institute, Gatchina, Russia)
- Löhner H.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Menze D.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Mertens T.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Messchendorp J.G.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Metag V.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Nanova M.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Nikonov V.A.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Novinski D.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Novotny R.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- Ostrick M.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Pant L.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Roy A.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Sarantsev A.V.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Schadmand S.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Schmidt C.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Schmieden H.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Schoch B.(Physikalisches Institut, UniversitÀt Bonn, Germany)
- Shende S.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Sokhoyan V.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Sumachev V.V.(Petersburg Nuclear Physics Institute, Gatchina, Russia)
- Szczepanek T.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- SĂŒle A.(Physikalisches Institut, UniversitĂ€t Bonn, Germany)
- Thoma U.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Trnka D.(II. Physikalisches Institut, UniversitĂ€t GieĂen, Germany)
- van Pee H.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Varma R.(Kernfysisch Versneller Instituut, Groningen, The Netherlands)
- Walther D.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Wendel Ch.(Helmholtz Institut fĂŒr Strahlen- und Kernphysik, UniversitĂ€t Bonn, Germany)
- Publication venue
- Publication date
- 17/10/2014
- Field of study
The reaction ÎłpâKS0ÎŁ+ is studied in the photon energy range from threshold. Linearly polarised photon beams from coherent bremsstrahlung enabled the first measurement of photon beam asymmetries in this reaction up to EÎł=1650MeV . In addition, the recoil hyperon polarisation was determined through the asymmetry in the weak decay ÎŁ+âpÏ0 up to EÎł=2250MeV . The data are compared to partial wave analyses, and the possible impact on the interpretation of a recently observed prominent structure in the cross section near the Kâ thresholds is discussed
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