Physics Letters B (Sep 2023)
First measurement of polarisation transfer Cx′n in deuteron photodisintegration
- M. Bashkanov,
- D.P. Watts,
- S. Kay,
- S. Abt,
- P. Achenbach,
- P. Adlarson,
- F. Afzal,
- Z. Ahmed,
- C.S. Akondi,
- J.R.M. Annand,
- H.J. Arends,
- R. Beck,
- M. Biroth,
- N. Borisov,
- A. Braghieri,
- W.J. Briscoe,
- F. Cividini,
- C. Collicott,
- S. Costanza,
- A. Denig,
- E.J. Downie,
- P. Drexler,
- S. Fegan,
- A. Fix,
- S. Gardner,
- D. Ghosal,
- D.I. Glazier,
- I. Gorodnov,
- W. Gradl,
- M. Günther,
- D. Gurevich,
- L. Heijkenskjöld,
- D. Hornidge,
- G.M. Huber,
- A. Käser,
- V.L. Kashevarov,
- M. Korolija,
- B. Krusche,
- A. Lazarev,
- K. Livingston,
- S. Lutterer,
- I.J.D. MacGregor,
- D.M. Manley,
- P.P. Martel,
- R. Miskimen,
- E. Mornacchi,
- C. Mullen,
- A. Neganov,
- A. Neiser,
- M. Ostrick,
- P.B. Otte,
- D. Paudyal,
- P. Pedroni,
- A. Powell,
- S.N. Prakhov,
- V. Sokhoyan,
- K. Spieker,
- O. Steffen,
- I.I. Strakovsky,
- T. Strub,
- I. Supek,
- A. Thiel,
- M. Thiel,
- A. Thomas,
- Yu.A. Usov,
- S. Wagner,
- J. Wettig,
- M. Wolfes,
- N. Zachariou
Affiliations
- M. Bashkanov
- Department of Physics, University of York, Heslington, York, Y010 5DD, UK; Corresponding author.
- D.P. Watts
- Department of Physics, University of York, Heslington, York, Y010 5DD, UK
- S. Kay
- Department of Physics, University of York, Heslington, York, Y010 5DD, UK
- S. Abt
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
- P. Achenbach
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- P. Adlarson
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- F. Afzal
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
- Z. Ahmed
- University of Regina, Regina, SK S4S-0A2, Canada
- C.S. Akondi
- Kent State University, Kent, OH 44242, USA
- J.R.M. Annand
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- H.J. Arends
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- R. Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
- M. Biroth
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- N. Borisov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
- A. Braghieri
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
- W.J. Briscoe
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
- F. Cividini
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- C. Collicott
- Department of Astronomy and Physics, Saint Mary's University, E4L1E6 Halifax, Canada
- S. Costanza
- Dipartimento di Fisica, Università di Pavia, I-27100 Pavia, Italy; INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
- A. Denig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- E.J. Downie
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
- P. Drexler
- II. Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany; Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- S. Fegan
- Department of Physics, University of York, Heslington, York, Y010 5DD, UK
- A. Fix
- Tomsk Polytechnic University, 634034 Tomsk, Russia
- S. Gardner
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- D. Ghosal
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
- D.I. Glazier
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- I. Gorodnov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
- W. Gradl
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- M. Günther
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
- D. Gurevich
- Institute for Nuclear Research, RU-125047 Moscow, Russia
- L. Heijkenskjöld
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- D. Hornidge
- Mount Allison University, Sackville, New Brunswick E4L1E6, Canada
- G.M. Huber
- University of Regina, Regina, SK S4S-0A2, Canada
- A. Käser
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
- V.L. Kashevarov
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany; Joint Institute for Nuclear Research, 141980 Dubna, Russia
- M. Korolija
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
- B. Krusche
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
- A. Lazarev
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
- K. Livingston
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- S. Lutterer
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
- I.J.D. MacGregor
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- D.M. Manley
- Kent State University, Kent, OH 44242, USA
- P.P. Martel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany; Mount Allison University, Sackville, New Brunswick E4L1E6, Canada
- R. Miskimen
- University of Massachusetts, Amherst, MA 01003, USA
- E. Mornacchi
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- C. Mullen
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- A. Neganov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
- A. Neiser
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- M. Ostrick
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- P.B. Otte
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- D. Paudyal
- University of Regina, Regina, SK S4S-0A2, Canada
- P. Pedroni
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
- A. Powell
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- S.N. Prakhov
- University of California Los Angeles, Los Angeles, CA 90095-1547, USA
- V. Sokhoyan
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- K. Spieker
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
- O. Steffen
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- I.I. Strakovsky
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
- T. Strub
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
- I. Supek
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
- A. Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
- M. Thiel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- A. Thomas
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- Yu.A. Usov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
- S. Wagner
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- J. Wettig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- M. Wolfes
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- N. Zachariou
- Department of Physics, University of York, Heslington, York, Y010 5DD, UK
- Journal volume & issue
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Vol. 844
p. 138080
Abstract
A first measurement of the polarisation transfer from a circularly-polarised photon to the final state neutron (Cx′n) in deuterium photodisintegration has been carried out. This quantity is determined over the photon energy range 370 – 700 MeV and for neutron centre-of-mass breakup angles ∼45−120∘. The polarisation of the final state neutrons was determined by an ancillary large-acceptance nucleon polarimeter, surrounding a cryogenic liquid deuterium target within the Crystal Ball detector at MAMI. The polarimeter characterised (n,p) charge exchange of the ejected neutrons to determine their polarisation. The new Cx′n data are also compared to a theoretical model based on nucleonic and nucleon resonance degrees of freedom constrained by the current world-database of deuterium photodisintegration measurements. Structures in Cx′n observed in the region of the d⁎(2380) could not be explained by conventional models of deuteron photodisintegration.
