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Signatures of the d
Bashkanov, M; Watts, D P; Kay, S J D; Abt, S; Achenbach, P; Adlarson, P; Afzal, F; Ahmed, Z; Akondi, C S; Annand, J R M; Arends, H J; Beck, R; Biroth, M; Borisov, N; Braghieri, A; Briscoe, W J; Cividini, F; Collicott, C; Costanza, S; Denig, A; Downie, E J; Drexler, P; Fegan, S; Fix, A; Gardner, S; Ghosal, D; Glazier, D I; Gorodnov, I; Gradl, W; Günther, M; Gurevich, D; Heijkenskjöld, L; Hornidge, D; Huber, G M; Käser, A; Kashevarov, V L; Korolija, M; Krusche, B; Lazarev, A; Livingston, K; Lutterer, S; MacGregor, I J D; Manley, D M; Martel, P P; Miskimen, R; Mornacchi, E; Mullen, C; Neganov, A; Neiser, A; Ostrick, M.
Afiliação
  • Bashkanov M; Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom.
  • Watts DP; Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom.
  • Kay SJD; University of Regina, Regina, SK S4S0A2 Canada.
  • Abt S; Department of Physics, University of Basel, Ch-4056 Basel, Switzerland.
  • Achenbach P; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Adlarson P; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Afzal F; Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany.
  • Ahmed Z; University of Regina, Regina, SK S4S0A2 Canada.
  • Akondi CS; Kent State University, Kent, Ohio 44242, USA.
  • Annand JRM; SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
  • Arends HJ; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Beck R; Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany.
  • Biroth M; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Borisov N; Joint Institute for Nuclear Research, 141980 Dubna, Russia.
  • Braghieri A; INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy.
  • Briscoe WJ; Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA.
  • Cividini F; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Collicott C; Department of Astronomy and Physics, Saint Mary's University, E4L1E6 Halifax, Canada.
  • Costanza S; INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy.
  • Denig A; Dipartimento di Fisica, Università di Pavia, I-27100 Pavia, Italy.
  • Downie EJ; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Drexler P; Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA.
  • Fegan S; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Fix A; II. Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
  • Gardner S; Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom.
  • Ghosal D; Tomsk Polytechnic University, 634034 Tomsk, Russia.
  • Glazier DI; SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
  • Gorodnov I; Department of Physics, University of Basel, Ch-4056 Basel, Switzerland.
  • Gradl W; SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
  • Günther M; Joint Institute for Nuclear Research, 141980 Dubna, Russia.
  • Gurevich D; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Heijkenskjöld L; Department of Physics, University of Basel, Ch-4056 Basel, Switzerland.
  • Hornidge D; Institute for Nuclear Research, RU-125047 Moscow, Russia.
  • Huber GM; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Käser A; Mount Allison University, Sackville, New Brunswick E4L1E6, Canada.
  • Kashevarov VL; University of Regina, Regina, SK S4S0A2 Canada.
  • Korolija M; Department of Physics, University of Basel, Ch-4056 Basel, Switzerland.
  • Krusche B; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Lazarev A; Joint Institute for Nuclear Research, 141980 Dubna, Russia.
  • Livingston K; Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia.
  • Lutterer S; Department of Physics, University of Basel, Ch-4056 Basel, Switzerland.
  • MacGregor IJD; Joint Institute for Nuclear Research, 141980 Dubna, Russia.
  • Manley DM; SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
  • Martel PP; Department of Physics, University of Basel, Ch-4056 Basel, Switzerland.
  • Miskimen R; SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
  • Mornacchi E; Kent State University, Kent, Ohio 44242, USA.
  • Mullen C; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
  • Neganov A; Mount Allison University, Sackville, New Brunswick E4L1E6, Canada.
  • Neiser A; University of Massachusetts, Amherst, Massachusetts 01003, USA.
  • Ostrick M; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
Phys Rev Lett ; 124(13): 132001, 2020 Apr 03.
Article em En | MEDLINE | ID: mdl-32302204
ABSTRACT
We report a measurement of the spin polarization of the recoiling neutron in deuterium photodisintegration, utilizing a new large acceptance polarimeter within the Crystal Ball at MAMI. The measured photon energy range of 300-700 MeV provides the first measurement of recoil neutron polarization at photon energies where the quark substructure of the deuteron plays a role, thereby providing important new constraints on photodisintegration mechanisms. A very high neutron polarization in a narrow structure centered around E_{γ}∼570 MeV is observed, which is inconsistent with current theoretical predictions employing nucleon resonance degrees of freedom. A Legendre polynomial decomposition suggests this behavior could be related to the excitation of the d^{*}(2380) hexaquark.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Reino Unido