pi super(0) pi super(0) Production in proton-proton collisions at Tp=1.4 GeV

• Published in: Physics letters. B Vol. 706; no. 4-5; pp. 256 - 262
• Main Authors: Adolph, C, Augustyniak, W, Bashkanov, M, Bednarski, T, Bergmann, F S, Bhatt, H, Brinkmann, K-T, Buescher, M, Calen, H, Clement, H, Coderre, D, Czerwinski, E, Doroshkevich, E, Erven, W, Eyrich, W, Fedorets, P, Fohl, K, Fransson, K, Goslawski, P, Grigoryev, K, Gullstrom, C-O, Heijkenskjold, L, Hodana, M, Jacewicz, M, Janusz, M, Jany, A, Jany, B R, Jarczyk, L, Johansson, T, Kamys, B, Kemmerling, G, Khakimova, O, Khoukaz, A, Kistryn, S, Klaja, J, Kleines, H, Klos, B, Kren, F, Krzemien, W, Kulessa, P, Kupsc, A, Lalwani, K, Lorentz, B, Magiera, A, Maier, R, Marianski, B, Marciniewski, P, Mikirtychiants, M, Morsch, H-P, Nandi, B K, Niedzwiecki, S, Ohm, H, Passfeld, A, Pauly, C, Del Rio, EPerez, Petukhov, Y, Piskunov, N, Plucinski, P, Podkopal, P, Povtoreyko, A, Prasuhn, D, Pricking, A, Pysz, K, Rausmann, T, Redmer, C F, Roy, A, Rudy, Z, Sawant, S, Schadmand, S, Schmidt, A, Sefzick, T, Serdyuk, V, Shah, N, Siemaszko, M, Skurzok, M, Smyrski, J, Stepaniak, J, Sterzenbach, G, Stockhorst, H, Stroher, H, Szczurek, A, Taeschner, A, Tolba, T, Trzcinski, A, Vlasov, P, Wagner, G J, Weglorz, W, Wiedner, U, Winnemoller, A, Wolke, M, Wronska, A, Wuestner, P, Wurm, P, Yuan, X, Yurev, L, Zabierowski, J, Zheng, C, Zielinski, MJ, Zipper, W, Zupranski, P
• Format: Journal Article
• Language: English
• Published: 05-01-2012
• Subjects: Collisions; Cross sections (physics); Decay; Elementary particles; Energy (nuclear); Energy use; Kinematics; Pions
• ISSN: 0370-2693
• DOI: 10.1016/j.physletb.2011.11.041

The reaction pp arrow right pp pi super(0) pi super(0) has been investigated at a beam energy of 1.4 GeV using the WASA-at-COSY facility. The total cross section is found to be (324+/-systematic sub(21)+/-normalization sub(58)) mu b. In order to study the production mechanism, differential kinematic distributions have been evaluated. The differential distributions indicate that both initial state protons are excited into intermediate Delta (1232) resonances, each decaying into a proton and a single pion, thereby producing the pion pair in the final state. No significant contribution of the Roper resonance N super( square )(1440) via its decay into a proton and two pions is found.