1. Measurement of the eta -> 3 pi(0) Dalitz plot distribution with the WASA detector at COSY
- Author
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Adolph, C, Angelstein, M, Bashkanov, M, Bechstedt, U, Belostotski, S, Berlowski, M, Bhatt, H, Bisplinghoff, J, Bondar, A, Borasoy, B, Buescher, M, Calèn, H, Chandwani, K, Clement, H, Czerwinski, E, Czyzykiewicz, R, D'Orsaneo, G, Duniec, D, Ekström, C, Engels, R, Erven, W, Eyrich, W, Fedorets, P, Felden, O, Fransson, K, Gil, D, Goldenbaum, F, Grigoryev, K, Heczko, A, Hanhart, C, Hejny, V, Hinterberger, F, Hodana, M, Hoeistad, B, Izotov, A, Jacewicz, M, Janusz, M, Jany, R, Jarczyk, L, Johansson, T, Kamys, B, Kemmerling, G, Keshelashvili, I, Khakimova, O, Khoukaz, A, Kilian, K, Kimura, N, Kistryn, S, Klaja, J, Klaja, P, Kleines, H, Klos, B, Kowalczyk, A, Kren, F, Krzemien, W, Kulessa, P, Kullander, S, Kupsc, A, Kuzmin, A, Kyryanchuk, V, Majewski, J, Machner, H, Magiera, A, Maier, R, Marciniewski, R, Migdal, W, Meissner, U.-G., Mikirtychiants, M, Miklukho, O, Milke, N, Mittag, M, Moskal, P, Nandi, K, Nawrot, A, Nissler, R, Odoyo, A, Oelert, W, Ohm, H, Paul, N, Pauly, C, Petukhov, Y, Piskunov, N, Plucinski, P, Podkopal, P, Povtoreyko, A, Prasuhn, D, Pricking, A, Pysz, K, Rachowski, J, Rausmann, T, Redmer, F, Ritman, J, Roy, A, Ruber, R. J. M. Y, Rudy, Z, Salmin, R, Schadmand, S, Schmidt, A, Schneider, H, Schroeder, W, Scobel, W, Sefzick, T, Serdyuk, V, Shah, N, Siemaszko, M, Siudak, R, Skorodko, T, Smolinski, T, Smyrski, J, Sopov, V, Spoelgen, D, Stepaniak, J, Sterzenbach, G, Stroeher, H, Szczurek, A, Teufel, A, Tolba, T, Trzcinski, A, Ulbrich, K, Varma, R, Vlasov, P, Weglorz, W, Winnemoeller, A, Wirzba, A, Wolke, M, Wronska, A, Wuestner, R, Xu, H, Yamamoto, A, Yamaoka, H, Yuan, X, Yurev, L, Zabierowski, J, Zheng, C, Zielinski, J, Zipper, W, Zlomanczuk, J, Zwoll, K, Zychor, I, Adolph, C, Angelstein, M, Bashkanov, M, Bechstedt, U, Belostotski, S, Berlowski, M, Bhatt, H, Bisplinghoff, J, Bondar, A, Borasoy, B, Buescher, M, Calèn, H, Chandwani, K, Clement, H, Czerwinski, E, Czyzykiewicz, R, D'Orsaneo, G, Duniec, D, Ekström, C, Engels, R, Erven, W, Eyrich, W, Fedorets, P, Felden, O, Fransson, K, Gil, D, Goldenbaum, F, Grigoryev, K, Heczko, A, Hanhart, C, Hejny, V, Hinterberger, F, Hodana, M, Hoeistad, B, Izotov, A, Jacewicz, M, Janusz, M, Jany, R, Jarczyk, L, Johansson, T, Kamys, B, Kemmerling, G, Keshelashvili, I, Khakimova, O, Khoukaz, A, Kilian, K, Kimura, N, Kistryn, S, Klaja, J, Klaja, P, Kleines, H, Klos, B, Kowalczyk, A, Kren, F, Krzemien, W, Kulessa, P, Kullander, S, Kupsc, A, Kuzmin, A, Kyryanchuk, V, Majewski, J, Machner, H, Magiera, A, Maier, R, Marciniewski, R, Migdal, W, Meissner, U.-G., Mikirtychiants, M, Miklukho, O, Milke, N, Mittag, M, Moskal, P, Nandi, K, Nawrot, A, Nissler, R, Odoyo, A, Oelert, W, Ohm, H, Paul, N, Pauly, C, Petukhov, Y, Piskunov, N, Plucinski, P, Podkopal, P, Povtoreyko, A, Prasuhn, D, Pricking, A, Pysz, K, Rachowski, J, Rausmann, T, Redmer, F, Ritman, J, Roy, A, Ruber, R. J. M. Y, Rudy, Z, Salmin, R, Schadmand, S, Schmidt, A, Schneider, H, Schroeder, W, Scobel, W, Sefzick, T, Serdyuk, V, Shah, N, Siemaszko, M, Siudak, R, Skorodko, T, Smolinski, T, Smyrski, J, Sopov, V, Spoelgen, D, Stepaniak, J, Sterzenbach, G, Stroeher, H, Szczurek, A, Teufel, A, Tolba, T, Trzcinski, A, Ulbrich, K, Varma, R, Vlasov, P, Weglorz, W, Winnemoeller, A, Wirzba, A, Wolke, M, Wronska, A, Wuestner, R, Xu, H, Yamamoto, A, Yamaoka, H, Yuan, X, Yurev, L, Zabierowski, J, Zheng, C, Zielinski, J, Zipper, W, Zlomanczuk, J, Zwoll, K, and Zychor, I
- Abstract
In the first production run of the WASA experiment at COSY, the eta decay into three neutral pions was measured in proton-proton interactions at a proton beam kinetic energy of 1.4 GeV. The Dalitz plot of the three pious was Studied using 1.2 x 10(5) fully reconstructed events. and the quadratic slope parameter alpha was determined to be -0.027 +/- 0.008(stat) +/- 0.005(syst). The result is consistent with previous measurements and further corroborates the importance of pion-pion final state interactions. (C) 2009 Elsevier B.V. All rights reserved.
- Published
- 2009
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