The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region

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

Результат исследований: Материалы для журналаСтатья

8 Цитирования (Scopus)

Выдержка

Photoproduction of πη-pairs from nucleons has been investigated from threshold up to incident photon energies of ≈ 1.4 GeV. The quasi-free reactions γp→pπ0η, γn→nπ0η, γp→nπ+η, and γn→pπ-η were for the first time measured from nucleons bound in the deuteron. The corresponding reactions from a free-proton target were also studied to investigate final-state interaction effects (for neutral pions the free-proton results could be compared to previous measurements; the γp→nπ+η reaction was measured for the first time). For the π0η final state coherent production via the γd→dπ0η reaction was also investigated. The experiments were performed at the tagged photon beam of the Mainz MAMI accelerator using an almost 4π coverage electromagnetic calorimeter composed of the Crystal Ball and TAPS detectors. The total cross sections for the four different final states obey the relation σ(pπ0η)≈σ(nπ0η)≈2σ(pπ-η)≈2σ(nπ+η) as expected for a dominant contribution from a δ*→ηδ(1232)→πηN reaction chain, which is also supported by the shapes of the invariant-mass distributions of nucleon-meson and π-η pairs. The experimental results are compared to the predictions from an isobar reaction model.

Язык оригиналаАнглийский
Страницы (с-по)244-250
Число страниц7
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том748
DOI
СостояниеОпубликовано - 2 сен 2015

Отпечаток

photoproduction
thresholds
nucleons
protons
isobars
photon beams
mass distribution
calorimeters
deuterons
balls
pions
accelerators
mesons
electromagnetism
detectors
cross sections
photons
predictions
crystals
interactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Цитировать

The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region. / Käser, A.; Ahrens, J.; Annand, J. R.M.; Arends, H. J.; Bantawa, K.; Bartolome, P. A.; Beck, R.; Bekrenev, V.; Berghäuser, H.; Braghieri, A.; Branford, D.; Briscoe, W. J.; Brudvik, J.; Cherepnya, S.; Costanza, S.; Demissie, B.; Dieterle, M.; 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.; Jahn, O.; Jaegle, I.; Jude, T. C.; Kashevarov, V. L.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Kruglov, S. P.; Krusche, B.; Lisin, V.; Livingston, K.; MacGregor, I. J.D.; Maghrbi, Y.; Mancell, J.; Manley, D. M.; Marinides, Z.; McGeorge, J. C.; McNicoll, E.; Mekterovic, D.; Metag, V.; Micanovic, S.; Middleton, D. G.; Mushkarenkov, A.; Nikolaev, A.; Novotny, R.; Oberle, M.; Ostrick, M.; Otte, P.; Oussena, B.; Pedroni, P.; Pheron, F.; Polonski, A.; Prakhov, S. N.; Robinson, J.; Rosner, G.; Rostomyan, T.; Schumann, S.; Sikora, M. H.; Sober, D. I.; Starostin, A.; Supek, I.; Thiel, M.; Thomas, A.; Unverzagt, M.; Watts, D. P.; Werthmüller, D.; Witthauer, L.

В: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Том 748, 02.09.2015, стр. 244-250.

Результат исследований: Материалы для журналаСтатья

Käser, A, Ahrens, J, Annand, JRM, Arends, HJ, Bantawa, K, Bartolome, PA, Beck, R, Bekrenev, V, Berghäuser, H, Braghieri, A, Branford, D, Briscoe, WJ, Brudvik, J, Cherepnya, S, Costanza, S, Demissie, B, Dieterle, M, Downie, EJ, Drexler, P, Fil'kov, LV, Fix, A, Glazier, DI, Hamilton, D, Heid, E, Hornidge, D, Howdle, D, Huber, GM, Jahn, O, Jaegle, I, Jude, TC, Kashevarov, VL, Keshelashvili, I, Kondratiev, R, Korolija, M, Kruglov, SP, Krusche, B, Lisin, V, Livingston, K, MacGregor, IJD, Maghrbi, Y, Mancell, J, Manley, DM, Marinides, Z, McGeorge, JC, McNicoll, E, Mekterovic, D, Metag, V, Micanovic, S, Middleton, DG, Mushkarenkov, A, Nikolaev, A, Novotny, R, Oberle, M, Ostrick, M, Otte, P, Oussena, B, Pedroni, P, Pheron, F, Polonski, A, Prakhov, SN, Robinson, J, Rosner, G, Rostomyan, T, Schumann, S, Sikora, MH, Sober, DI, Starostin, A, Supek, I, Thiel, M, Thomas, A, Unverzagt, M, Watts, DP, Werthmüller, D & Witthauer, L 2015, 'The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, том. 748, стр. 244-250. https://doi.org/10.1016/j.physletb.2015.07.007
Käser, A. ; Ahrens, J. ; Annand, J. R.M. ; Arends, H. J. ; Bantawa, K. ; Bartolome, P. A. ; Beck, R. ; Bekrenev, V. ; Berghäuser, H. ; Braghieri, A. ; Branford, D. ; Briscoe, W. J. ; Brudvik, J. ; Cherepnya, S. ; Costanza, S. ; Demissie, B. ; Dieterle, M. ; 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. ; Jahn, O. ; Jaegle, I. ; Jude, T. C. ; Kashevarov, V. L. ; Keshelashvili, I. ; Kondratiev, R. ; Korolija, M. ; Kruglov, S. P. ; Krusche, B. ; Lisin, V. ; Livingston, K. ; MacGregor, I. J.D. ; Maghrbi, Y. ; Mancell, J. ; Manley, D. M. ; Marinides, Z. ; McGeorge, J. C. ; McNicoll, E. ; Mekterovic, D. ; Metag, V. ; Micanovic, S. ; Middleton, D. G. ; Mushkarenkov, A. ; Nikolaev, A. ; Novotny, R. ; Oberle, M. ; Ostrick, M. ; Otte, P. ; Oussena, B. ; Pedroni, P. ; Pheron, F. ; Polonski, A. ; Prakhov, S. N. ; Robinson, J. ; Rosner, G. ; Rostomyan, T. ; Schumann, S. ; Sikora, M. H. ; Sober, D. I. ; Starostin, A. ; Supek, I. ; Thiel, M. ; Thomas, A. ; Unverzagt, M. ; Watts, D. P. ; Werthmüller, D. ; Witthauer, L. / The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region. В: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2015 ; Том 748. стр. 244-250.
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title = "The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region",
abstract = "Photoproduction of πη-pairs from nucleons has been investigated from threshold up to incident photon energies of ≈ 1.4 GeV. The quasi-free reactions γp→pπ0η, γn→nπ0η, γp→nπ+η, and γn→pπ-η were for the first time measured from nucleons bound in the deuteron. The corresponding reactions from a free-proton target were also studied to investigate final-state interaction effects (for neutral pions the free-proton results could be compared to previous measurements; the γp→nπ+η reaction was measured for the first time). For the π0η final state coherent production via the γd→dπ0η reaction was also investigated. The experiments were performed at the tagged photon beam of the Mainz MAMI accelerator using an almost 4π coverage electromagnetic calorimeter composed of the Crystal Ball and TAPS detectors. The total cross sections for the four different final states obey the relation σ(pπ0η)≈σ(nπ0η)≈2σ(pπ-η)≈2σ(nπ+η) as expected for a dominant contribution from a δ*→ηδ(1232)→πηN reaction chain, which is also supported by the shapes of the invariant-mass distributions of nucleon-meson and π-η pairs. The experimental results are compared to the predictions from an isobar reaction model.",
author = "A. K{\"a}ser and J. Ahrens and Annand, {J. R.M.} and Arends, {H. J.} and K. Bantawa and Bartolome, {P. A.} and R. Beck and V. Bekrenev and H. Bergh{\"a}user and A. Braghieri and D. Branford and Briscoe, {W. J.} and J. Brudvik and S. Cherepnya and S. Costanza and B. Demissie and M. Dieterle and Downie, {E. J.} and P. Drexler and Fil'kov, {L. V.} and A. Fix and Glazier, {D. I.} and D. Hamilton and E. Heid and D. Hornidge and D. Howdle and Huber, {G. M.} and O. Jahn and I. Jaegle and Jude, {T. C.} and Kashevarov, {V. L.} and I. Keshelashvili and R. Kondratiev and M. Korolija and Kruglov, {S. P.} and B. Krusche and V. Lisin and K. Livingston and MacGregor, {I. J.D.} and Y. Maghrbi and J. Mancell and Manley, {D. M.} and Z. Marinides and McGeorge, {J. C.} and E. McNicoll and D. Mekterovic and V. Metag and S. Micanovic and Middleton, {D. G.} and A. Mushkarenkov and A. Nikolaev and R. Novotny and M. Oberle and M. Ostrick and P. Otte and B. Oussena and P. Pedroni and F. Pheron and A. Polonski and Prakhov, {S. N.} and J. Robinson and G. Rosner and T. Rostomyan and S. Schumann and Sikora, {M. H.} and Sober, {D. I.} and A. Starostin and I. Supek and M. Thiel and A. Thomas and M. Unverzagt and Watts, {D. P.} and D. Werthm{\"u}ller and L. Witthauer",
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day = "2",
doi = "10.1016/j.physletb.2015.07.007",
language = "English",
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pages = "244--250",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
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TY - JOUR

T1 - The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region

AU - Käser, A.

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 - Berghäuser, H.

AU - Braghieri, A.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brudvik, J.

AU - Cherepnya, S.

AU - Costanza, S.

AU - Demissie, B.

AU - Dieterle, M.

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 - Jahn, O.

AU - Jaegle, I.

AU - Jude, T. C.

AU - Kashevarov, V. L.

AU - Keshelashvili, I.

AU - Kondratiev, R.

AU - Korolija, M.

AU - Kruglov, S. P.

AU - Krusche, B.

AU - Lisin, V.

AU - Livingston, K.

AU - MacGregor, I. J.D.

AU - Maghrbi, Y.

AU - Mancell, J.

AU - Manley, D. M.

AU - Marinides, Z.

AU - McGeorge, J. C.

AU - McNicoll, E.

AU - Mekterovic, D.

AU - Metag, V.

AU - Micanovic, S.

AU - Middleton, D. G.

AU - Mushkarenkov, A.

AU - Nikolaev, A.

AU - Novotny, R.

AU - Oberle, M.

AU - Ostrick, M.

AU - Otte, P.

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. I.

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 - 2015/9/2

Y1 - 2015/9/2

N2 - Photoproduction of πη-pairs from nucleons has been investigated from threshold up to incident photon energies of ≈ 1.4 GeV. The quasi-free reactions γp→pπ0η, γn→nπ0η, γp→nπ+η, and γn→pπ-η were for the first time measured from nucleons bound in the deuteron. The corresponding reactions from a free-proton target were also studied to investigate final-state interaction effects (for neutral pions the free-proton results could be compared to previous measurements; the γp→nπ+η reaction was measured for the first time). For the π0η final state coherent production via the γd→dπ0η reaction was also investigated. The experiments were performed at the tagged photon beam of the Mainz MAMI accelerator using an almost 4π coverage electromagnetic calorimeter composed of the Crystal Ball and TAPS detectors. The total cross sections for the four different final states obey the relation σ(pπ0η)≈σ(nπ0η)≈2σ(pπ-η)≈2σ(nπ+η) as expected for a dominant contribution from a δ*→ηδ(1232)→πηN reaction chain, which is also supported by the shapes of the invariant-mass distributions of nucleon-meson and π-η pairs. The experimental results are compared to the predictions from an isobar reaction model.

AB - Photoproduction of πη-pairs from nucleons has been investigated from threshold up to incident photon energies of ≈ 1.4 GeV. The quasi-free reactions γp→pπ0η, γn→nπ0η, γp→nπ+η, and γn→pπ-η were for the first time measured from nucleons bound in the deuteron. The corresponding reactions from a free-proton target were also studied to investigate final-state interaction effects (for neutral pions the free-proton results could be compared to previous measurements; the γp→nπ+η reaction was measured for the first time). For the π0η final state coherent production via the γd→dπ0η reaction was also investigated. The experiments were performed at the tagged photon beam of the Mainz MAMI accelerator using an almost 4π coverage electromagnetic calorimeter composed of the Crystal Ball and TAPS detectors. The total cross sections for the four different final states obey the relation σ(pπ0η)≈σ(nπ0η)≈2σ(pπ-η)≈2σ(nπ+η) as expected for a dominant contribution from a δ*→ηδ(1232)→πηN reaction chain, which is also supported by the shapes of the invariant-mass distributions of nucleon-meson and π-η pairs. The experimental results are compared to the predictions from an isobar reaction model.

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U2 - 10.1016/j.physletb.2015.07.007

DO - 10.1016/j.physletb.2015.07.007

M3 - Article

AN - SCOPUS:84937230939

VL - 748

SP - 244

EP - 250

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

ER -