Intermediate resonance excitation in the γp→pπ 0π0 reaction

J. Ahrens; S. Altieri; J. R.M. Annand; G. Anton; H. J. Arends; K. Aulenbacher; R. Beck; C. Bradtke; A. Braghieri; N. Degrande; N. D'Hose; H. Dutz; S. Goertz; P. Grabmayr; K. Hansen; J. Harmsen; D. Von Harrach; S. Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H. Holvoet; L. Van Hoorebeke; N. Horikawa; T. Iwata; O. Jahn; P. Jennewein; T. Kageya; B. Kiel; F. Klein; R. Kondratiev; K. Kossert; J. Krimmer; M. Lang; B. Lannoy; R. Leukel; V. Lisin; T. Matsuda; J. C. McGeorge; A. Meier; D. Menze; W. Meyer; T. Michel; J. Naumann; A. Panzeri; P. Pedroni; T. Pinelli; I. Preobrajenski; E. Radtke; E. Reichert; G. Reicherz; Ch Rohlof; G. Rosner; T. Rostomyan; D. Ryckbosch; M. Sauer; B. Schoch; M. Schumacher; B. Seitz; T. Speckner; N. Takabayashi; G. Tamas; A. Thomas; R. Van De Vyver; A. Wakai; W. Weihofen; F. Wissmann; F. Zapadtka; G. Zeitler

doi:10.1016/j.physletb.2005.08.034

Intermediate resonance excitation in the γp→pπ ⁰π⁰ reaction

J. Ahrens, S. Altieri, J. R.M. Annand, G. Anton, H. J. Arends, K. Aulenbacher, R. Beck, C. Bradtke, A. Braghieri, N. Degrande, N. D'Hose, H. Dutz, S. Goertz, P. Grabmayr, K. Hansen, J. Harmsen, D. Von Harrach, S. Hasegawa, T. Hasegawa, E. HeidK. Helbing, H. Holvoet, L. Van Hoorebeke, N. Horikawa, T. Iwata, O. Jahn, P. Jennewein, T. Kageya, B. Kiel, F. Klein, R. Kondratiev, K. Kossert, J. Krimmer, M. Lang, B. Lannoy, R. Leukel, V. Lisin, T. Matsuda, J. C. McGeorge, A. Meier, D. Menze, W. Meyer, T. Michel, J. Naumann, A. Panzeri, P. Pedroni, T. Pinelli, I. Preobrajenski, E. Radtke, E. Reichert, G. Reicherz, Ch Rohlof, G. Rosner, T. Rostomyan, D. Ryckbosch, M. Sauer, B. Schoch, M. Schumacher, B. Seitz, T. Speckner, N. Takabayashi, G. Tamas, A. Thomas, R. Van De Vyver, A. Wakai, W. Weihofen, F. Wissmann, F. Zapadtka, G. Zeitler

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Abstract

The helicity dependence of the total cross section for the γ→p→→pπ0π0 reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The measurement, performed at the tagged photon beam facility of the MAMI accelerator in Mainz, used the large acceptance detector DAPHNE and a longitudinally polarized frozen-spin target. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, most likely due to the intermediate production of the D13(1520) resonance. However, the contribution of the antiparallel spin configuration, arising from other reaction mechanisms, is also not negligible. This result gives important new information to resolve the existing model discrepancies in the identification of the nucleon resonances contributing to this channel.

Original language	English
Pages (from-to)	173-180
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	624
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2005.08.034
Publication status	Published - Sept 29 2005
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2005.08.034

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Ahrens, J., Altieri, S., Annand, J. R. M., Anton, G., Arends, H. J., Aulenbacher, K., Beck, R., Bradtke, C., Braghieri, A., Degrande, N., D'Hose, N., Dutz, H., Goertz, S., Grabmayr, P., Hansen, K., Harmsen, J., Von Harrach, D., Hasegawa, S., Hasegawa, T., ... Zeitler, G. (2005). Intermediate resonance excitation in the γp→pπ ⁰π⁰ reaction. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 624(3-4), 173-180. https://doi.org/10.1016/j.physletb.2005.08.034

Ahrens, J, Altieri, S, Annand, JRM, Anton, G, Arends, HJ, Aulenbacher, K, Beck, R, Bradtke, C, Braghieri, A, Degrande, N, D'Hose, N, Dutz, H, Goertz, S, Grabmayr, P, Hansen, K, Harmsen, J, Von Harrach, D, Hasegawa, S, Hasegawa, T, Heid, E, Helbing, K, Holvoet, H, Van Hoorebeke, L, Horikawa, N, Iwata, T, Jahn, O, Jennewein, P, Kageya, T, Kiel, B, Klein, F, Kondratiev, R, Kossert, K, Krimmer, J, Lang, M, Lannoy, B, Leukel, R, Lisin, V, Matsuda, T, McGeorge, JC, Meier, A, Menze, D, Meyer, W, Michel, T, Naumann, J, Panzeri, A, Pedroni, P, Pinelli, T, Preobrajenski, I, Radtke, E, Reichert, E, Reicherz, G, Rohlof, C, Rosner, G, Rostomyan, T, Ryckbosch, D, Sauer, M, Schoch, B, Schumacher, M, Seitz, B, Speckner, T, Takabayashi, N, Tamas, G, Thomas, A, Van De Vyver, R, Wakai, A, Weihofen, W, Wissmann, F, Zapadtka, F & Zeitler, G 2005, 'Intermediate resonance excitation in the γp→pπ ⁰π⁰ reaction', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 624, no. 3-4, pp. 173-180. https://doi.org/10.1016/j.physletb.2005.08.034

@article{463ed78a4fb4411186759ea1270b6d2e,

title = "Intermediate resonance excitation in the γp→pπ 0π0 reaction",

abstract = "The helicity dependence of the total cross section for the γ→p→→pπ0π0 reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The measurement, performed at the tagged photon beam facility of the MAMI accelerator in Mainz, used the large acceptance detector DAPHNE and a longitudinally polarized frozen-spin target. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, most likely due to the intermediate production of the D13(1520) resonance. However, the contribution of the antiparallel spin configuration, arising from other reaction mechanisms, is also not negligible. This result gives important new information to resolve the existing model discrepancies in the identification of the nucleon resonances contributing to this channel.",

author = "J. Ahrens and S. Altieri and Annand, {J. R.M.} and G. Anton and Arends, {H. J.} and K. Aulenbacher and R. Beck and C. Bradtke and A. Braghieri and N. Degrande and N. D'Hose and H. Dutz and S. Goertz and P. Grabmayr and K. Hansen and J. Harmsen and {Von Harrach}, D. and S. Hasegawa and T. Hasegawa and E. Heid and K. Helbing and H. Holvoet and {Van Hoorebeke}, L. and N. Horikawa and T. Iwata and O. Jahn and P. Jennewein and T. Kageya and B. Kiel and F. Klein and R. Kondratiev and K. Kossert and J. Krimmer and M. Lang and B. Lannoy and R. Leukel and V. Lisin and T. Matsuda and McGeorge, {J. C.} and A. Meier and D. Menze and W. Meyer and T. Michel and J. Naumann and A. Panzeri and P. Pedroni and T. Pinelli and I. Preobrajenski and E. Radtke and E. Reichert and G. Reicherz and Ch Rohlof and G. Rosner and T. Rostomyan and D. Ryckbosch and M. Sauer and B. Schoch and M. Schumacher and B. Seitz and T. Speckner and N. Takabayashi and G. Tamas and A. Thomas and {Van De Vyver}, R. and A. Wakai and W. Weihofen and F. Wissmann and F. Zapadtka and G. Zeitler",

note = "Funding Information: The authors wish to acknowledge the excellent support of the accelerator group of MAMI. This work was supported by the Deutsche Forschungsgemeinschaft (SFB 201, SFB 443, Schwerpunktprogramm 1034, and GRK683), the INFN, Italy, the FWO Vlaanderen, Belgium, the IWT, Belgium, the UK Engineering and Physical Science Research Council, the DAAD, JSPS Research Fellowship, and the Grant-in-Aid, Monbusho, Japan. ",

year = "2005",

month = sep,

day = "29",

doi = "10.1016/j.physletb.2005.08.034",

language = "English",

volume = "624",

pages = "173--180",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Intermediate resonance excitation in the γp→pπ 0π0 reaction

AU - Ahrens, J.

AU - Altieri, S.

AU - Annand, J. R.M.

AU - Anton, G.

AU - Arends, H. J.

AU - Aulenbacher, K.

AU - Beck, R.

AU - Bradtke, C.

AU - Braghieri, A.

AU - Degrande, N.

AU - D'Hose, N.

AU - Dutz, H.

AU - Goertz, S.

AU - Grabmayr, P.

AU - Hansen, K.

AU - Harmsen, J.

AU - Von Harrach, D.

AU - Hasegawa, S.

AU - Hasegawa, T.

AU - Heid, E.

AU - Helbing, K.

AU - Holvoet, H.

AU - Van Hoorebeke, L.

AU - Horikawa, N.

AU - Iwata, T.

AU - Jahn, O.

AU - Jennewein, P.

AU - Kageya, T.

AU - Kiel, B.

AU - Klein, F.

AU - Kondratiev, R.

AU - Kossert, K.

AU - Krimmer, J.

AU - Lang, M.

AU - Lannoy, B.

AU - Leukel, R.

AU - Lisin, V.

AU - Matsuda, T.

AU - McGeorge, J. C.

AU - Meier, A.

AU - Menze, D.

AU - Meyer, W.

AU - Michel, T.

AU - Naumann, J.

AU - Panzeri, A.

AU - Pedroni, P.

AU - Pinelli, T.

AU - Preobrajenski, I.

AU - Radtke, E.

AU - Reichert, E.

AU - Reicherz, G.

AU - Rohlof, Ch

AU - Rosner, G.

AU - Rostomyan, T.

AU - Ryckbosch, D.

AU - Sauer, M.

AU - Schoch, B.

AU - Schumacher, M.

AU - Seitz, B.

AU - Speckner, T.

AU - Takabayashi, N.

AU - Tamas, G.

AU - Thomas, A.

AU - Van De Vyver, R.

AU - Wakai, A.

AU - Weihofen, W.

AU - Wissmann, F.

AU - Zapadtka, F.

AU - Zeitler, G.

N1 - Funding Information: The authors wish to acknowledge the excellent support of the accelerator group of MAMI. This work was supported by the Deutsche Forschungsgemeinschaft (SFB 201, SFB 443, Schwerpunktprogramm 1034, and GRK683), the INFN, Italy, the FWO Vlaanderen, Belgium, the IWT, Belgium, the UK Engineering and Physical Science Research Council, the DAAD, JSPS Research Fellowship, and the Grant-in-Aid, Monbusho, Japan.

PY - 2005/9/29

Y1 - 2005/9/29

N2 - The helicity dependence of the total cross section for the γ→p→→pπ0π0 reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The measurement, performed at the tagged photon beam facility of the MAMI accelerator in Mainz, used the large acceptance detector DAPHNE and a longitudinally polarized frozen-spin target. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, most likely due to the intermediate production of the D13(1520) resonance. However, the contribution of the antiparallel spin configuration, arising from other reaction mechanisms, is also not negligible. This result gives important new information to resolve the existing model discrepancies in the identification of the nucleon resonances contributing to this channel.

AB - The helicity dependence of the total cross section for the γ→p→→pπ0π0 reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The measurement, performed at the tagged photon beam facility of the MAMI accelerator in Mainz, used the large acceptance detector DAPHNE and a longitudinally polarized frozen-spin target. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, most likely due to the intermediate production of the D13(1520) resonance. However, the contribution of the antiparallel spin configuration, arising from other reaction mechanisms, is also not negligible. This result gives important new information to resolve the existing model discrepancies in the identification of the nucleon resonances contributing to this channel.

UR - http://www.scopus.com/inward/record.url?scp=24344459535&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24344459535&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2005.08.034

DO - 10.1016/j.physletb.2005.08.034

M3 - Article

AN - SCOPUS:24344459535

SN - 0370-2693

VL - 624

SP - 173

EP - 180

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

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

IS - 3-4

ER -

Intermediate resonance excitation in the γp→pπ ⁰π⁰ reaction

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