Measurement of the slope parameter alpha for the eta -> 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)

S. Prakhov; B. M. K. Nefkens; P. Aguar-Bartolome; L. K. Akasoy; J. R. M. Annand; H. J. Arends; K. Bantawa; R. Beck; V. Bekrenev; H. Berghaeuser; B. Boillat; A. Braghieri; D. Branford; W. J. Briscoe; J. Brudvik; S. Cherepnya; R. F. B. Codling; E. J. Downie; P. Drexler; L. V. Fil'kov; D. I. Glazier; R. Gregor; E. Heid; D. Hornidge; O. Jahn; T. C. Jude; V. L. Kashevarov; J. D. Kellie; R. Kondratiev; M. Korolija; M. Kotulla; A. Koulbardis; D. Krambrich; S. Kruglov; B. Krusche; M. Lang; V. Lisin; K. Livingston; I. J. D. MacGregor; Y. Maghrbi; D. M. Manley; M. Martinez; J. C. McGeorge; E. F. McNicoll; D. Mekterovic; V. Metag; S. Micanovic; A. Nikolaev; R. Novotny; M. Ostrick; P. B. Otte; P. Pedroni; F. Pheron; A. Polonski; J. Robinson; G. Rosner; M. Rost; T. Rostomyan; S. Schumann; M. H. Sikora; D. I. Sober; A. Starostin; I. M. Suarez; I. Supek; C. M. Tarbert; M. Thiel; A. Thomas; M. Unverzagt; D. P. Watts; I. Zamboni; F. Zehr

doi:10.1103/PhysRevC.79.035204

Measurement of the slope parameter alpha for the eta -> 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)

S. Prakhov, B. M. K. Nefkens, P. Aguar-Bartolome, L. K. Akasoy, J. R. M. Annand, H. J. Arends, K. Bantawa, R. Beck, V. Bekrenev, H. Berghaeuser, B. Boillat, A. Braghieri, D. Branford, W. J. Briscoe, J. Brudvik, S. Cherepnya, R. F. B. Codling, E. J. Downie, P. Drexler, L. V. Fil'kovD. I. Glazier, R. Gregor, E. Heid, D. Hornidge, O. Jahn, T. C. Jude, V. L. Kashevarov, J. D. Kellie, R. Kondratiev, M. Korolija, M. Kotulla, A. Koulbardis, D. Krambrich, S. Kruglov, B. Krusche, M. Lang, V. Lisin, K. Livingston, I. J. D. MacGregor, Y. Maghrbi, D. M. Manley, M. Martinez, J. C. McGeorge, E. F. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, A. Nikolaev, R. Novotny, M. Ostrick, P. B. Otte, P. Pedroni, F. Pheron, A. Polonski, J. Robinson, G. Rosner, M. Rost, T. Rostomyan, S. Schumann, M. H. Sikora, D. I. Sober, A. Starostin, I. M. Suarez, I. Supek, C. M. Tarbert, M. Thiel, A. Thomas, M. Unverzagt, D. P. Watts, I. Zamboni, F. Zehr

School of Physics and Astronomy

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Abstract / Description of output

The dynamics of the eta -> 3 pi(0) decay have been studied with the Crystal Ball multiphoton spectrometer and the TAPS calorimeter. Bremsstrahlung photons produced by the 1.5-GeV electron beam of the Mainz microtron MAMI-C and tagged by the Glasgow photon spectrometer were used for eta-meson production. The analysis of 3x10(6) gamma p ->eta p -> 3 pi(0)p -> 6 gamma p events yields the value alpha=-0.032 +/- 0.003 for the eta -> 3 pi(0) slope parameter, which agrees with the majority of recent experimental results and has the smallest uncertainty. The pi(0)pi(0) invariant-mass spectrum was investigated for the occurrence of a cusplike structure in the vicinity of the pi(+)pi(-) threshold. The observed effect is small and does not affect our measured value for the slope parameter.

Original language	English
Article number	035204
Pages (from-to)	-
Number of pages	13
Journal	Physical Review C
Volume	79
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.79.035204
Publication status	Published - Mar 2009

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Prakhov, S., Nefkens, B. M. K., Aguar-Bartolome, P., Akasoy, L. K., Annand, J. R. M., Arends, H. J., Bantawa, K., Beck, R., Bekrenev, V., Berghaeuser, H., Boillat, B., Braghieri, A., Branford, D., Briscoe, W. J., Brudvik, J., Cherepnya, S., Codling, R. F. B., Downie, E. J., Drexler, P., ... Zehr, F. (2009). Measurement of the slope parameter alpha for the eta -> 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C). Physical Review C, 79(3), -. Article 035204. https://doi.org/10.1103/PhysRevC.79.035204

@article{624017fa907a4d4784fe3a4d79dc4f80,

title = "Measurement of the slope parameter alpha for the eta -> 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)",

abstract = "The dynamics of the eta -> 3 pi(0) decay have been studied with the Crystal Ball multiphoton spectrometer and the TAPS calorimeter. Bremsstrahlung photons produced by the 1.5-GeV electron beam of the Mainz microtron MAMI-C and tagged by the Glasgow photon spectrometer were used for eta-meson production. The analysis of 3x10(6) gamma p ->eta p -> 3 pi(0)p -> 6 gamma p events yields the value alpha=-0.032 +/- 0.003 for the eta -> 3 pi(0) slope parameter, which agrees with the majority of recent experimental results and has the smallest uncertainty. The pi(0)pi(0) invariant-mass spectrum was investigated for the occurrence of a cusplike structure in the vicinity of the pi(+)pi(-) threshold. The observed effect is small and does not affect our measured value for the slope parameter.",

author = "S. Prakhov and Nefkens, {B. M. K.} and P. Aguar-Bartolome and Akasoy, {L. K.} and Annand, {J. R. M.} and Arends, {H. J.} and K. Bantawa and R. Beck and V. Bekrenev and H. Berghaeuser and B. Boillat and A. Braghieri and D. Branford and Briscoe, {W. J.} and J. Brudvik and S. Cherepnya and Codling, {R. F. B.} and Downie, {E. J.} 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 Jude, {T. C.} and Kashevarov, {V. L.} and Kellie, {J. D.} and R. Kondratiev and M. Korolija and M. Kotulla and A. Koulbardis and D. Krambrich and S. Kruglov and B. Krusche and M. Lang and V. Lisin and K. Livingston and MacGregor, {I. J. D.} and Y. Maghrbi and Manley, {D. M.} and M. Martinez and McGeorge, {J. C.} and McNicoll, {E. F.} and D. Mekterovic and V. Metag and S. Micanovic and A. Nikolaev and R. Novotny and M. Ostrick and Otte, {P. B.} and P. Pedroni and F. Pheron and A. Polonski and J. Robinson and G. Rosner and M. Rost and T. Rostomyan and S. Schumann and Sikora, {M. H.} and Sober, {D. I.} and A. Starostin and Suarez, {I. M.} and I. Supek and Tarbert, {C. M.} and M. Thiel and A. Thomas and M. Unverzagt and Watts, {D. P.} and I. Zamboni and F. Zehr",

year = "2009",

month = mar,

doi = "10.1103/PhysRevC.79.035204",

language = "English",

volume = "79",

pages = "--",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

Prakhov, S, Nefkens, BMK, Aguar-Bartolome, P, Akasoy, LK, Annand, JRM, Arends, HJ, Bantawa, K, Beck, R, Bekrenev, V, Berghaeuser, H, Boillat, B, Braghieri, A, Branford, D, Briscoe, WJ, Brudvik, J, Cherepnya, S, Codling, RFB, Downie, EJ, Drexler, P, Fil'kov, LV, Glazier, DI, Gregor, R, Heid, E, Hornidge, D, Jahn, O, Jude, TC, Kashevarov, VL, Kellie, JD, Kondratiev, R, Korolija, M, Kotulla, M, Koulbardis, A, Krambrich, D, Kruglov, S, Krusche, B, Lang, M, Lisin, V, Livingston, K, MacGregor, IJD, Maghrbi, Y, Manley, DM, Martinez, M, McGeorge, JC, McNicoll, EF, Mekterovic, D, Metag, V, Micanovic, S, Nikolaev, A, Novotny, R, Ostrick, M, Otte, PB, Pedroni, P, Pheron, F, Polonski, A, Robinson, J, Rosner, G, Rost, M, Rostomyan, T, Schumann, S, Sikora, MH, Sober, DI, Starostin, A, Suarez, IM, Supek, I, Tarbert, CM, Thiel, M, Thomas, A, Unverzagt, M, Watts, DP, Zamboni, I & Zehr, F 2009, 'Measurement of the slope parameter alpha for the eta -> 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)', Physical Review C, vol. 79, no. 3, 035204, pp. -. https://doi.org/10.1103/PhysRevC.79.035204

TY - JOUR

T1 - Measurement of the slope parameter alpha for the eta -> 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)

AU - Prakhov, S.

AU - Nefkens, B. M. K.

AU - Aguar-Bartolome, P.

AU - Akasoy, L. K.

AU - Annand, J. R. M.

AU - Arends, H. J.

AU - Bantawa, K.

AU - Beck, R.

AU - Bekrenev, V.

AU - Berghaeuser, H.

AU - Boillat, B.

AU - Braghieri, A.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brudvik, J.

AU - Cherepnya, S.

AU - Codling, R. F. B.

AU - Downie, E. J.

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 - Jude, T. C.

AU - Kashevarov, V. L.

AU - Kellie, J. D.

AU - Kondratiev, R.

AU - Korolija, M.

AU - Kotulla, M.

AU - Koulbardis, A.

AU - Krambrich, D.

AU - Kruglov, S.

AU - Krusche, B.

AU - Lang, M.

AU - Lisin, V.

AU - Livingston, K.

AU - MacGregor, I. J. D.

AU - Maghrbi, Y.

AU - Manley, D. M.

AU - Martinez, M.

AU - McGeorge, J. C.

AU - McNicoll, E. F.

AU - Mekterovic, D.

AU - Metag, V.

AU - Micanovic, S.

AU - Nikolaev, A.

AU - Novotny, R.

AU - Ostrick, M.

AU - Otte, P. B.

AU - Pedroni, P.

AU - Pheron, F.

AU - Polonski, A.

AU - Robinson, J.

AU - Rosner, G.

AU - Rost, M.

AU - Rostomyan, T.

AU - Schumann, S.

AU - Sikora, M. H.

AU - Sober, D. I.

AU - Starostin, A.

AU - Suarez, I. M.

AU - Supek, I.

AU - Tarbert, C. M.

AU - Thiel, M.

AU - Thomas, A.

AU - Unverzagt, M.

AU - Watts, D. P.

AU - Zamboni, I.

AU - Zehr, F.

PY - 2009/3

Y1 - 2009/3

N2 - The dynamics of the eta -> 3 pi(0) decay have been studied with the Crystal Ball multiphoton spectrometer and the TAPS calorimeter. Bremsstrahlung photons produced by the 1.5-GeV electron beam of the Mainz microtron MAMI-C and tagged by the Glasgow photon spectrometer were used for eta-meson production. The analysis of 3x10(6) gamma p ->eta p -> 3 pi(0)p -> 6 gamma p events yields the value alpha=-0.032 +/- 0.003 for the eta -> 3 pi(0) slope parameter, which agrees with the majority of recent experimental results and has the smallest uncertainty. The pi(0)pi(0) invariant-mass spectrum was investigated for the occurrence of a cusplike structure in the vicinity of the pi(+)pi(-) threshold. The observed effect is small and does not affect our measured value for the slope parameter.

AB - The dynamics of the eta -> 3 pi(0) decay have been studied with the Crystal Ball multiphoton spectrometer and the TAPS calorimeter. Bremsstrahlung photons produced by the 1.5-GeV electron beam of the Mainz microtron MAMI-C and tagged by the Glasgow photon spectrometer were used for eta-meson production. The analysis of 3x10(6) gamma p ->eta p -> 3 pi(0)p -> 6 gamma p events yields the value alpha=-0.032 +/- 0.003 for the eta -> 3 pi(0) slope parameter, which agrees with the majority of recent experimental results and has the smallest uncertainty. The pi(0)pi(0) invariant-mass spectrum was investigated for the occurrence of a cusplike structure in the vicinity of the pi(+)pi(-) threshold. The observed effect is small and does not affect our measured value for the slope parameter.

U2 - 10.1103/PhysRevC.79.035204

DO - 10.1103/PhysRevC.79.035204

M3 - Article

SN - 0556-2813

VL - 79

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 035204

ER -

Measurement of the slope parameter alpha for the eta -> 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)

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