Anisotropy in the pion angular distribution of the reaction pp -> pp pi0 at 400 MeV

P. Thorngren Engblom , S. Negasi Keleta , F. Cappellaro , B. Hoistad , M. Jacewicz , T. Johansson , I. Koch , S. Kullander

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H. Pettersson K. Schonning J. Zlomanczuk H. Calen K. Fransson A. Kupsc P. Marciniewski M. Wolke C. Pauly L. Demirors W. Scobel J. Stepaniak J. Zabierowski M. Bashkanov H. Clement O. Khakimova F. Kren T. Skorodko

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keywords angulardistributionreactionagreementanisotropicanisotropycalculationcelsius

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The reaction pp -> pp pi0 was studied with the WASA detector at the CELSIUS storage ring. The center of mass angular distribution of the pi0 was obtained by detection of the gamma decay products together with the two outgoing protons, and found to be anisotropic with a negative second derivative slope, in agreement with the theoretical predictions from a microscopic calculation.

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Anisotropy in the pion angular distribution of the reaction pp -> pp pi0 at 400 MeV

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