pi(0)pi(0) Production in proton-proton collisions at T-p=1.4 GeV The WASA-at-COSY Collaboration
ADLARSON, P; ADOLPH, C; AUGUSTYNIAK, W; BASHKANOV, M; BEDNARSKI, T; BERGMANN, FS; BERLOWSKI, M; BHATT, H; BRINKMANN, KT; BUSCHER, M; CALEN, H; CLEMENT, H; CODERRE, D; CZERWINSKI, E; DOROSHKEVICH, E; ENGELS, R; ERVEN, W; EYRICH, W; FEDORETS, P; FOHL, K; FRANSSON, K; GOLDENBAUM, F; GOSLAWSKI, P; GRIGORYEV, K; GULLSTROM, CO; HEIJKENSKJOLD, L; HEIMLICH, J; HEJNY, V; HINTERBERGER, F; HODANA, M; HOISTAD, B; JACEWICZ, M; JANUSZ, M; JANY, A; JANY, BR; 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, HP; MOSKAL, P; NANDI, BK; NIEDZWIECKI, S; OHM, H; PASSFELD, A; PAULY, C; DEL RIO, EP; PETUKHOV, Y; PISKUNOV, N; PLUCINSKI, P; PODKOPAL, P; POVTOREYKO, A; PRASUHN, D; PRICKING, A; PYSZ, K; RAUSMANN, T; REDMER, CF; RITMAN, J; ROY, A; RUDY, Z; SAWANT, S; SCHADMAND, S; SCHMIDT, A; SEFZICK, T; SERDYUK, V; SHAH, N; SIEMASZKO, M; SKORODKO, T; SKURZOK, M; SMYRSKI, J; SOPOV, V; STASSEN, R; STEPANIAK, J; STERZENBACH, G; STOCKHORST, H; STROHER, H; SZCZUREK, A; TASCHNER, A; TOLBA, T; TRZCINSKI, A; VARMA, R; VLASOV, P; WAGNER, GJ; WEGLORZ, W; WIEDNER, U; WINNEMOLLER, A; WOLKE, M; WRONSKA, A; WUSTNER, P; WURM, P; YUAN, X; YUREV, L; ZABIEROWSKI, J; ZHENG, C; ZIELINSKI, MJ; ZIPPER, W; ZLOMANCZUK, J; ZUPRANSKI, P
Date:
2012
Abstract:
The reaction pp -> pp pi(0)pi(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 +/- 21(systematic) +/- 58(normalization)) 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*(1440) via its decay into a proton and two pions is found. (C) 2011 Elsevier B.V. All rights reserved.
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