Exclusive Measurements of pp -> dpi+pi0: Double-Pionic Fusion without ABC Effect

F. Kren; M. Bashkanov; D. Bogoslawsky; H. Calen; H. Clement; L. Demiroers; C. Ekstrom; k. Fransson; J. Greiff; L. Gustafsson; B. Hoistad; G. Ivanov; M. Jacewicz; E. Jiganov; T. Kohansson; O. Khakimova; S. Keleta; I. Koch; S. Kullander; A. Kupsc; P. Marciniewski; R. Meier; B. Morosov; C. Pauly; H. Petren; Y. Petukhov; A. Povtoreijko; R. J. M. Y. Ruber; K. Schonning; W. Scobel; T. Skorodko; B. Shwartz; J. Stepaniak; P. Thorngren-Engblom; V. Tikhomirov; G. J. Wagner; M. Wolke; A. Yamamoto; J. Zabierowski; J. Zlomanczuk

doi:10.1016/j.physletb.2009.12.061 10.1016/j.physletb.2011.07.021

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arXiv · 0910.0995

Exclusive Measurements of pp -> dpi+pi0: Double-Pionic Fusion without ABC Effect

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Abstract

Exclusive measurements of the reaction pp -> dpi+pi0 have been carried out at T_p = 1.1 GeV at the CELSIUS storage ring using the WASA detector. The isovector pi+pi0 channel exhibits no enhancement at low invariant pipi masses, i. e. no ABC effect. The differential distributions are in agreement with the conventional t-channel Delta-Delta excitation process, which also accounts for the observed energy dependence of the total cross section. This is an update of a previously published version -- see important note at the end of the article.

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F. Kren, M. Bashkanov, D. Bogoslawsky, H. Calen, H. Clement, L. Demiroers, C. Ekstrom, k. Fransson, J. Greiff, L. Gustafsson, B. Hoistad, G. Ivanov, M. Jacewicz, E. Jiganov, T. Kohansson, O. Khakimova, S. Keleta, I. Koch, S. Kullander, A. Kupsc, P. Marciniewski, R. Meier, B. Morosov, C. Pauly, H. Petren, Y. Petukhov, A. Povtoreijko, R. J. M. Y. Ruber, K. Schonning, W. Scobel, T. Skorodko, B. Shwartz, J. Stepaniak, P. Thorngren-Engblom, V. Tikhomirov, G. J. Wagner, M. Wolke, A. Yamamoto, J. Zabierowski, J. Zlomanczuk. 2009-10-06. Exclusive Measurements of pp -> dpi+pi0: Double-Pionic Fusion without ABC Effect. https://doi.org/10.1016/j.physletb.2009.12.061 10.1016/j.physletb.2011.07.021

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