Radiative pi(0) photoproduction on protons in the Delta(+)(1232) region

S. Schumann; B. Boillat; E. J. Downie; P. Aguar-Bartolome; J. Ahrens; J. R. M. Annand; H. J. Arends; R. Beck; V. Bekrenev; A. Braghieri; D. Branford; W. J. Briscoe; J. W. Brudvik; S. Cherepnya; R. Codling; P. Drexler; L. V. Fil'kov; D. I. Glazier; R. Gregor; E. Heid; D. Hornidge; O. Jahn; V. L. Kashevarov; R. Kondratiev; M. Korolija; M. Kotulla; D. Krambrich; B. Krusche; M. Lang; V. Lisin; K. Livingston; S. Lugert; I. J. D. MacGregor; D. M. Manley; M. Martinez-Fabregate; J. C. McGeorge; D. Mekterovic; V. Metag; B. M. K. Nefkens; A. Nikolaev; R. Novotny; M. Ostrick; R. O. Owens; P. Pedroni; A. Polonski; S. N. Prakhov; J. W. Price; G. Rosner; M. Rost; T. Rostomyan; D. Sober; A. Starostin; I. Supek; C. M. Tarbert; A. Thomas; M. Unverzagt; Th. Walcher; D. P. Watts; F. Zehr

doi:10.1140/epja/i2010-10925-y

Radiative pi(0) photoproduction on protons in the Delta(+)(1232) region

S. Schumann, B. Boillat, E. J. Downie, P. Aguar-Bartolome, J. Ahrens, J. R. M. Annand, H. J. Arends, R. Beck, V. Bekrenev, A. Braghieri, D. Branford, W. J. Briscoe, J. W. Brudvik, S. Cherepnya, R. Codling, P. Drexler, L. V. Fil'kov, D. I. Glazier, R. Gregor, E. HeidD. Hornidge, O. Jahn, V. L. Kashevarov, R. Kondratiev, M. Korolija, M. Kotulla, D. Krambrich, B. Krusche, M. Lang, V. Lisin, K. Livingston, S. Lugert, I. J. D. MacGregor, D. M. Manley, M. Martinez-Fabregate, J. C. McGeorge, D. Mekterovic, V. Metag, B. M. K. Nefkens, A. Nikolaev, R. Novotny, M. Ostrick, R. O. Owens, P. Pedroni, A. Polonski, S. N. Prakhov, J. W. Price, G. Rosner, M. Rost, T. Rostomyan, D. Sober, A. Starostin, I. Supek, C. M. Tarbert, A. Thomas, M. Unverzagt, Th. Walcher, D. P. Watts, F. Zehr

School of Physics and Astronomy

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Abstract / Description of output

The reaction gamma p -> p pi(0)gamma' has been measured with the Crystal Ball/TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross-sections for the emitted photon gamma' and angular differential cross-sections for the pi(0) have been determined with high statistics in the energy range of the Delta(+)(1232)-resonance. Cross-sections and the ratio of the cross-section to the nonradiative process gamma p -> p pi(0) are compared to theoretical reaction models, having the anomalous magnetic moment kappa(Delta+) as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of kappa(Delta+) is feasible.

Original language	English
Pages (from-to)	269-282
Number of pages	14
Journal	The European Physical Journal A (EPJ A)
Volume	43
Issue number	3
DOIs	https://doi.org/10.1140/epja/i2010-10925-y
Publication status	Published - Mar 2010

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10.1140/epja/i2010-10925-y

Illuminating strongly interacting matter
Watts, D.
STFC
1/06/09 → 31/12/13
Project: Research

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Schumann, S., Boillat, B., Downie, E. J., Aguar-Bartolome, P., Ahrens, J., Annand, J. R. M., Arends, H. J., Beck, R., Bekrenev, V., Braghieri, A., Branford, D., Briscoe, W. J., Brudvik, J. W., Cherepnya, S., Codling, R., Drexler, P., Fil'kov, L. V., Glazier, D. I., Gregor, R., ... Zehr, F. (2010). Radiative pi(0) photoproduction on protons in the Delta(+)(1232) region. The European Physical Journal A (EPJ A), 43(3), 269-282. https://doi.org/10.1140/epja/i2010-10925-y

@article{9dcef63e3d594c7ebfb49090f3476eb4,

title = "Radiative pi(0) photoproduction on protons in the Delta(+)(1232) region",

abstract = "The reaction gamma p -> p pi(0)gamma' has been measured with the Crystal Ball/TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross-sections for the emitted photon gamma' and angular differential cross-sections for the pi(0) have been determined with high statistics in the energy range of the Delta(+)(1232)-resonance. Cross-sections and the ratio of the cross-section to the nonradiative process gamma p -> p pi(0) are compared to theoretical reaction models, having the anomalous magnetic moment kappa(Delta+) as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of kappa(Delta+) is feasible.",

author = "S. Schumann and B. Boillat and Downie, {E. J.} and P. Aguar-Bartolome and J. Ahrens and Annand, {J. R. M.} and Arends, {H. J.} and R. Beck and V. Bekrenev and A. Braghieri and D. Branford and Briscoe, {W. J.} and Brudvik, {J. W.} and S. Cherepnya and R. Codling and P. Drexler and Fil'kov, {L. V.} and Glazier, {D. I.} and R. Gregor and E. Heid and D. Hornidge and O. Jahn and Kashevarov, {V. L.} and R. Kondratiev and M. Korolija and M. Kotulla and D. Krambrich and B. Krusche and M. Lang and V. Lisin and K. Livingston and S. Lugert and MacGregor, {I. J. D.} and Manley, {D. M.} and M. Martinez-Fabregate and McGeorge, {J. C.} and D. Mekterovic and V. Metag and Nefkens, {B. M. K.} and A. Nikolaev and R. Novotny and M. Ostrick and Owens, {R. O.} and P. Pedroni and A. Polonski and Prakhov, {S. N.} and Price, {J. W.} and G. Rosner and M. Rost and T. Rostomyan and D. Sober and A. Starostin and I. Supek and Tarbert, {C. M.} and A. Thomas and M. Unverzagt and Th. Walcher and Watts, {D. P.} and F. Zehr",

year = "2010",

month = mar,

doi = "10.1140/epja/i2010-10925-y",

language = "English",

volume = "43",

pages = "269--282",

journal = "The European Physical Journal A (EPJ A)",

issn = "1434-6001",

publisher = "Springer",

number = "3",

}

Schumann, S, Boillat, B, Downie, EJ, Aguar-Bartolome, P, Ahrens, J, Annand, JRM, Arends, HJ, Beck, R, Bekrenev, V, Braghieri, A, Branford, D, Briscoe, WJ, Brudvik, JW, Cherepnya, S, Codling, R, Drexler, P, Fil'kov, LV, Glazier, DI, Gregor, R, Heid, E, Hornidge, D, Jahn, O, Kashevarov, VL, Kondratiev, R, Korolija, M, Kotulla, M, Krambrich, D, Krusche, B, Lang, M, Lisin, V, Livingston, K, Lugert, S, MacGregor, IJD, Manley, DM, Martinez-Fabregate, M, McGeorge, JC, Mekterovic, D, Metag, V, Nefkens, BMK, Nikolaev, A, Novotny, R, Ostrick, M, Owens, RO, Pedroni, P, Polonski, A, Prakhov, SN, Price, JW, Rosner, G, Rost, M, Rostomyan, T, Sober, D, Starostin, A, Supek, I, Tarbert, CM, Thomas, A, Unverzagt, M, Walcher, T, Watts, DP & Zehr, F 2010, 'Radiative pi(0) photoproduction on protons in the Delta(+)(1232) region', The European Physical Journal A (EPJ A), vol. 43, no. 3, pp. 269-282. https://doi.org/10.1140/epja/i2010-10925-y

TY - JOUR

T1 - Radiative pi(0) photoproduction on protons in the Delta(+)(1232) region

AU - Schumann, S.

AU - Boillat, B.

AU - Downie, E. J.

AU - Aguar-Bartolome, P.

AU - Ahrens, J.

AU - Annand, J. R. M.

AU - Arends, H. J.

AU - Beck, R.

AU - Bekrenev, V.

AU - Braghieri, A.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brudvik, J. W.

AU - Cherepnya, S.

AU - Codling, R.

AU - Drexler, P.

AU - Fil'kov, L. V.

AU - Glazier, D. I.

AU - Gregor, R.

AU - Heid, E.

AU - Hornidge, D.

AU - Jahn, O.

AU - Kashevarov, V. L.

AU - Kondratiev, R.

AU - Korolija, M.

AU - Kotulla, M.

AU - Krambrich, D.

AU - Krusche, B.

AU - Lang, M.

AU - Lisin, V.

AU - Livingston, K.

AU - Lugert, S.

AU - MacGregor, I. J. D.

AU - Manley, D. M.

AU - Martinez-Fabregate, M.

AU - McGeorge, J. C.

AU - Mekterovic, D.

AU - Metag, V.

AU - Nefkens, B. M. K.

AU - Nikolaev, A.

AU - Novotny, R.

AU - Ostrick, M.

AU - Owens, R. O.

AU - Pedroni, P.

AU - Polonski, A.

AU - Prakhov, S. N.

AU - Price, J. W.

AU - Rosner, G.

AU - Rost, M.

AU - Rostomyan, T.

AU - Sober, D.

AU - Starostin, A.

AU - Supek, I.

AU - Tarbert, C. M.

AU - Thomas, A.

AU - Unverzagt, M.

AU - Walcher, Th.

AU - Watts, D. P.

AU - Zehr, F.

PY - 2010/3

Y1 - 2010/3

N2 - The reaction gamma p -> p pi(0)gamma' has been measured with the Crystal Ball/TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross-sections for the emitted photon gamma' and angular differential cross-sections for the pi(0) have been determined with high statistics in the energy range of the Delta(+)(1232)-resonance. Cross-sections and the ratio of the cross-section to the nonradiative process gamma p -> p pi(0) are compared to theoretical reaction models, having the anomalous magnetic moment kappa(Delta+) as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of kappa(Delta+) is feasible.

AB - The reaction gamma p -> p pi(0)gamma' has been measured with the Crystal Ball/TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross-sections for the emitted photon gamma' and angular differential cross-sections for the pi(0) have been determined with high statistics in the energy range of the Delta(+)(1232)-resonance. Cross-sections and the ratio of the cross-section to the nonradiative process gamma p -> p pi(0) are compared to theoretical reaction models, having the anomalous magnetic moment kappa(Delta+) as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of kappa(Delta+) is feasible.

U2 - 10.1140/epja/i2010-10925-y

DO - 10.1140/epja/i2010-10925-y

M3 - Article

SN - 1434-6001

VL - 43

SP - 269

EP - 282

JO - The European Physical Journal A (EPJ A)

JF - The European Physical Journal A (EPJ A)

IS - 3

ER -

Radiative pi(0) photoproduction on protons in the Delta(+)(1232) region

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