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

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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

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classification ⚛️ nucl-ex

keywords effectexclusivemeasurementsaccountsagreementarticlebeencarried

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

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