Examination of the production of an isotensor dibaryon in the p p → p p π + π − reaction
- Adlarson, P.
- Augustyniak, W.
- Clement, H.
- Czerwiński, E.
- Demmich, K.
- Engels, R.
- Erven, A.
- Erven, W.
- Eyrich, W.
- Fedorets, P.
- Föhl, K.
- Fransson, K.
- Bardan, W.
- Goldenbaum, F.
- Goswami, A.
- Grigoryev, K.
- Heijkenskjöld, L.
- Hejny, V.
- Hüsken, N.
- Jarczyk, L.
- Johansson, T.
- Kamys, B.
- Kemmerling, G.
- Bashkanov, M.
- Khoukaz, A.
- Khreptak, O.
- Kirillov, D. A.
- Kistryn, S.
- Kleines, H.
- Kłos, B.
- Krzemień, W.
- Kulessa, P.
- Kupść, A.
- Lalwani, K.
- Bergmann, F. S.
- Lersch, D.
- Lorentz, B.
- Magiera, A.
- Maier, R.
- Marciniewski, P.
- Mariański, B.
- Morsch, H.-P.
- Moskal, P.
- Ohm, H.
- Parol, W.
- Berłowski, M.
- Perez del Rio, E.
- Piskunov, N. M.
- Prasuhn, D.
- Pszczel, D.
- Pysz, K.
- Ritman, J.
- Roy, A.
- Rudy, Z.
- Rundel, O.
- Sawant, S.
- Bondar, A.
- Schadmand, S.
- Schätti-Ozerianska, I.
- Sefzick, T.
- Serdyuk, V.
- Shwartz, B.
- Skorodko, T.
- Skurzok, M.
- Smyrski, J.
- Sopov, V.
- Stassen, R.
- Büscher, M.
- Stepaniak, J.
- Stephan, E.
- Sterzenbach, G.
- Stockhorst, H.
- Ströher, H.
- Szczurek, A.
- Trzciński, A.
- Wolke, M.
- Wrońska, A.
- Wüstner, P.
- Calén, H.
- Yamamoto, A.
- Zabierowski, J.
- Zieliński, M. J.
- Złomańczuk, J.
- Żuprański, P.
- Żurek, M.
- Ciepał, I.
DOIAbstract
The quasifree pp→ppπ+π− reaction has been measured by means of pd collisions at Tp=1.2GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region Tp=1.08–1.36 GeV (√s=2.35–2.46GeV) covering thus the regions of N∗(1440) and Δ(1232)Δ(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp→ppπ0π0 data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor ΔN dibaryon resonance with I(JP)=2(1+) produced associatedly with a pion...
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