P-wave dominance in the pd -> 3He pi+ pi- reaction near threshold measured with the MOMO experiment at COSY

The cross section of the pd -> 3He pi+ pi - reaction has been measured at the MOMO facility in a kinematically complete experiment at a c. m. excess energy of Q = 70 MeV. The energy and angular distributions show that the reaction is dominated by p-wave pi+ pi- pairs. This is in complete contrast...

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Published inarXiv.org
Main Authors Bellemann, F, Berg, A, Bisplinghoff, J, Bohlscheid, G, Ernst, J, Henrich, C, Hinterberger, F, Ibald, R, Jahn, R, Jarczyk, L, Joosten, R, Kozela, A, Machner, H, Magiera, A, Maschuw, R, Mayer-Kuckuk, T, Mertler, G, Munkel, J, P von Neumann-Cosel, Rosendaal, D, P von Rossen, Schnitker, H, Scho, K, Smyrski, J, Strzalkowski, A, Toelle, R, Wilkin, C
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.12.1998
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Summary:The cross section of the pd -> 3He pi+ pi - reaction has been measured at the MOMO facility in a kinematically complete experiment at a c. m. excess energy of Q = 70 MeV. The energy and angular distributions show that the reaction is dominated by p-wave pi+ pi- pairs. This is in complete contrast to the results of inclusive measurements at somewhat higher energies which show a strong s-wave ABC enhancement at low pi pi masses. There are however indications of p-wave pion pairs from other experiments at low Q.
ISSN:2331-8422