Photoproduction of π0 mesons off neutrons in the nucleon resonance region

M. Dieterle, I. Keshelashvili, J. Ahrens, J. R M Annand, H. J. Arends, K. Bantawa, P. A. Bartolome, R. Beck, V. Bekrenev, A. Braghieri, D. Branford, W. J. Briscoe, J. Brudvik, S. Cherepnya, B. Demissie, E. J. Downie, P. Drexler, L. V. Fil'Kov, A. Fix, D. I. Glazier & 54 others D. Hamilton, E. Heid, D. Hornidge, D. Howdle, G. M. Huber, I. Jaegle, O. Jahn, T. C. Jude, A. Käser, V. L. Kashevarov, R. Kondratiev, M. Korolija, S. P. Kruglov, B. Krusche, A. Kulbardis, V. Lisin, K. Livingston, I. J D MacGregor, Y. Maghrbi, J. Mancell, D. M. Manley, Z. Marinides, M. Martinez, J. C. McGeorge, E. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, D. G. Middleton, A. Mushkarenkov, B. M K Nefkens, A. Nikolaev, R. Novotny, M. Oberle, M. Ostrick, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, S. N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M. H. Sikora, D. Sober, A. Starostin, I. Supek, M. Thiel, A. Thomas, M. Unverzagt, D. P. Watts, D. Werthmüller, L. Witthauer

Research output: Contribution to journalArticle

22 Citations (Scopus)

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.

Original languageEnglish
Article number142001
JournalPhysical Review Letters
Volume112
Issue number14
DOIs
Publication statusPublished - 8 Apr 2014

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photoproduction
deuterons
mesons
neutrons
protons
photons
predictions
balls
kinematics
angular distribution
detectors
cross sections
crystals
interactions
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Dieterle, M., Keshelashvili, I., Ahrens, J., Annand, J. R. M., Arends, H. J., Bantawa, K., ... Witthauer, L. (2014). Photoproduction of π0 mesons off neutrons in the nucleon resonance region. Physical Review Letters, 112(14), [142001]. https://doi.org/10.1103/PhysRevLett.112.142001

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.; Nefkens, B. M K; Nikolaev, A.; Novotny, R.; Oberle, M.; Ostrick, M.; Oussena, B.; Pedroni, P.; Pheron, F.; Polonski, A.; Prakhov, S. N.; Robinson, J.; Rosner, G.; Rostomyan, T.; Schumann, S.; Sikora, M. H.; Sober, D.; Starostin, A.; Supek, I.; Thiel, M.; Thomas, A.; Unverzagt, M.; Watts, D. P.; Werthmüller, D.; Witthauer, L.

In: Physical Review Letters, Vol. 112, No. 14, 142001, 08.04.2014.

Research output: Contribution to journalArticle

Dieterle, M, Keshelashvili, I, Ahrens, J, Annand, JRM, Arends, HJ, Bantawa, K, Bartolome, PA, Beck, R, Bekrenev, V, Braghieri, A, Branford, D, Briscoe, WJ, Brudvik, J, Cherepnya, S, Demissie, B, Downie, EJ, Drexler, P, Fil'Kov, LV, Fix, A, Glazier, DI, Hamilton, D, Heid, E, Hornidge, D, Howdle, D, Huber, GM, Jaegle, I, Jahn, O, Jude, TC, Käser, A, Kashevarov, VL, Kondratiev, R, Korolija, M, Kruglov, SP, Krusche, B, Kulbardis, A, Lisin, V, Livingston, K, MacGregor, IJD, Maghrbi, Y, Mancell, J, Manley, DM, Marinides, Z, Martinez, M, McGeorge, JC, McNicoll, E, Mekterovic, D, Metag, V, Micanovic, S, Middleton, DG, Mushkarenkov, A, Nefkens, BMK, Nikolaev, A, Novotny, R, Oberle, M, Ostrick, M, Oussena, B, Pedroni, P, Pheron, F, Polonski, A, Prakhov, SN, Robinson, J, Rosner, G, Rostomyan, T, Schumann, S, Sikora, MH, Sober, D, Starostin, A, Supek, I, Thiel, M, Thomas, A, Unverzagt, M, Watts, DP, Werthmüller, D & Witthauer, L 2014, 'Photoproduction of π0 mesons off neutrons in the nucleon resonance region', Physical Review Letters, vol. 112, no. 14, 142001. https://doi.org/10.1103/PhysRevLett.112.142001
Dieterle M, Keshelashvili I, Ahrens J, Annand JRM, Arends HJ, Bantawa K et al. Photoproduction of π0 mesons off neutrons in the nucleon resonance region. Physical Review Letters. 2014 Apr 8;112(14). 142001. https://doi.org/10.1103/PhysRevLett.112.142001
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. ; Nefkens, B. M K ; Nikolaev, A. ; Novotny, R. ; Oberle, M. ; Ostrick, M. ; Oussena, B. ; Pedroni, P. ; Pheron, F. ; Polonski, A. ; Prakhov, S. N. ; Robinson, J. ; Rosner, G. ; Rostomyan, T. ; Schumann, S. ; Sikora, M. H. ; Sober, D. ; Starostin, A. ; Supek, I. ; Thiel, M. ; Thomas, A. ; Unverzagt, M. ; Watts, D. P. ; Werthmüller, D. ; Witthauer, L. / Photoproduction of π0 mesons off neutrons in the nucleon resonance region. In: Physical Review Letters. 2014 ; Vol. 112, No. 14.
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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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AU - Keshelashvili, I.

AU - Ahrens, J.

AU - Annand, J. R M

AU - Arends, H. J.

AU - Bantawa, K.

AU - Bartolome, P. A.

AU - Beck, R.

AU - Bekrenev, V.

AU - Braghieri, A.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brudvik, J.

AU - Cherepnya, S.

AU - Demissie, B.

AU - Downie, E. J.

AU - Drexler, P.

AU - Fil'Kov, L. V.

AU - Fix, A.

AU - Glazier, D. I.

AU - Hamilton, D.

AU - Heid, E.

AU - Hornidge, D.

AU - Howdle, D.

AU - Huber, G. M.

AU - Jaegle, I.

AU - Jahn, O.

AU - Jude, T. C.

AU - Käser, A.

AU - Kashevarov, V. L.

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AU - Korolija, M.

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AU - Kulbardis, A.

AU - Lisin, V.

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AU - MacGregor, I. J D

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AU - Martinez, M.

AU - McGeorge, J. C.

AU - McNicoll, E.

AU - Mekterovic, D.

AU - Metag, V.

AU - Micanovic, S.

AU - Middleton, D. G.

AU - Mushkarenkov, A.

AU - Nefkens, B. M K

AU - Nikolaev, A.

AU - Novotny, R.

AU - Oberle, M.

AU - Ostrick, M.

AU - Oussena, B.

AU - Pedroni, P.

AU - Pheron, F.

AU - Polonski, A.

AU - Prakhov, S. N.

AU - Robinson, J.

AU - Rosner, G.

AU - Rostomyan, T.

AU - Schumann, S.

AU - Sikora, M. H.

AU - Sober, D.

AU - Starostin, A.

AU - Supek, I.

AU - Thiel, M.

AU - Thomas, A.

AU - Unverzagt, M.

AU - Watts, D. P.

AU - Werthmüller, D.

AU - Witthauer, L.

PY - 2014/4/8

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AB - 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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