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Photoproduction of π0 mesons off neutrons in the nucleon resonance region.
Dieterle, M; Keshelashvili, I; Ahrens, J; Annand, J R M; Arends, H J; Bantawa, K; Bartolome, P A; Beck, R; Bekrenev, V; Braghieri, A; Branford, D; Briscoe, W J; Brudvik, J; Cherepnya, S; Demissie, B; Downie, E J; Drexler, P; Fil'kov, L V; Fix, A; Glazier, D I; Hamilton, D; Heid, E; Hornidge, D; Howdle, D; Huber, G M; Jaegle, I; Jahn, O; Jude, T C; Käser, A; Kashevarov, V L; Kondratiev, R; Korolija, M; Kruglov, S P; Krusche, B; Kulbardis, A; Lisin, V; Livingston, K; MacGregor, I J D; Maghrbi, Y; Mancell, J; Manley, D M; Marinides, Z; Martinez, M; McGeorge, J C; McNicoll, E; Mekterovic, D; Metag, V; Micanovic, S; Middleton, D G; Mushkarenkov, A.
Afiliação
  • Dieterle M; Department of Physics, University of Basel, Switzerland.
  • Keshelashvili I; Department of Physics, University of Basel, Switzerland.
  • Ahrens J; Institut für Kernphysik, University of Mainz, Germany.
  • Annand JR; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Arends HJ; Institut für Kernphysik, University of Mainz, Germany.
  • Bantawa K; Kent State University, Kent, Ohio, USA.
  • Bartolome PA; Institut für Kernphysik, University of Mainz, Germany.
  • Beck R; Institut für Kernphysik, University of Mainz, Germany and Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, Germany.
  • Bekrenev V; Petersburg Nuclear Physics Institute, Gatchina, Russia.
  • Braghieri A; INFN Sezione di Pavia, Pavia, Italy.
  • Branford D; School of Physics, University of Edinburgh, Edinburgh, United Kingdom.
  • Briscoe WJ; Center for Nuclear Studies, The George Washington University, Washington, DC, USA.
  • Brudvik J; University of California at Los Angeles, Los Angeles, California, USA.
  • Cherepnya S; Lebedev Physical Institute, Moscow, Russia.
  • Demissie B; Center for Nuclear Studies, The George Washington University, Washington, DC, USA.
  • Downie EJ; Institut für Kernphysik, University of Mainz, Germany and Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom and Center for Nuclear Studies, The George Washington University, Washington, DC, USA.
  • Drexler P; II. Physikalisches Institut, University of Giessen, Germany.
  • Fil'kov LV; Lebedev Physical Institute, Moscow, Russia.
  • Fix A; Laboratory of Mathematical Physics, Tomsk Polytechnic University, Tomsk, Russia.
  • Glazier DI; School of Physics, University of Edinburgh, Edinburgh, United Kingdom.
  • Hamilton D; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Heid E; Institut für Kernphysik, University of Mainz, Germany.
  • Hornidge D; Mount Allison University, Sackville, New Brunswick E4L 1E6, Canada.
  • Howdle D; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Huber GM; University of Regina, Regina, Saskatchewan S4S 0A2 Canada.
  • Jaegle I; Department of Physics, University of Basel, Switzerland.
  • Jahn O; Institut für Kernphysik, University of Mainz, Germany.
  • Jude TC; School of Physics, University of Edinburgh, Edinburgh, United Kingdom.
  • Käser A; Department of Physics, University of Basel, Switzerland.
  • Kashevarov VL; Institut für Kernphysik, University of Mainz, Germany and Lebedev Physical Institute, Moscow, Russia.
  • Kondratiev R; Institute for Nuclear Research, Moscow, Russia.
  • Korolija M; Rudjer Boskovic Institute, Zagreb, Croatia.
  • Kruglov SP; Petersburg Nuclear Physics Institute, Gatchina, Russia.
  • Krusche B; Department of Physics, University of Basel, Switzerland.
  • Kulbardis A; Petersburg Nuclear Physics Institute, Gatchina, Russia.
  • Lisin V; Institute for Nuclear Research, Moscow, Russia.
  • Livingston K; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • MacGregor IJ; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Maghrbi Y; Department of Physics, University of Basel, Switzerland.
  • Mancell J; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Manley DM; Kent State University, Kent, Ohio, USA.
  • Marinides Z; Center for Nuclear Studies, The George Washington University, Washington, DC, USA.
  • Martinez M; Institut für Kernphysik, University of Mainz, Germany.
  • McGeorge JC; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • McNicoll E; Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Mekterovic D; Rudjer Boskovic Institute, Zagreb, Croatia.
  • Metag V; II. Physikalisches Institut, University of Giessen, Germany.
  • Micanovic S; Rudjer Boskovic Institute, Zagreb, Croatia.
  • Middleton DG; Mount Allison University, Sackville, New Brunswick E4L 1E6, Canada.
  • Mushkarenkov A; INFN Sezione di Pavia, Pavia, Italy.
Phys Rev Lett ; 112(14): 142001, 2014 Apr 11.
Article em En | MEDLINE | ID: mdl-24765945
ABSTRACT
Precise angular distributions have been measured for the first time for the photoproduction of π0 mesons off neutrons bound in the deuteron. The effects from nuclear Fermi motion have been eliminated by a complete kinematic reconstruction of the final state. The influence of final-state-interaction effects has been estimated by a comparison of the reaction cross section for quasifree protons bound in the deuteron to the results for free protons and then applied as a correction to the quasifree neutron data. The experiment was performed at the tagged photon facility of the Mainz Microtron MAMI with the Crystal Ball and TAPS detector setup for incident photon energies between 0.45 and 1.4 GeV. The results are compared to the predictions from reaction models and partial-wave analyses based on data from other isospin channels. The model predictions show large discrepancies among each other and the present data will provide much tighter constraints. This is demonstrated by the results of a new analysis in the framework of the Bonn-Gatchina coupled-channel analysis which included the present data.
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Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2014 Tipo de documento: Article
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Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2014 Tipo de documento: Article