Isospin decomposition of the basic double-pionic fusion in the region of the ABC effect
- ADLARSON, P
- AUGUSTYNIAK, W
- BARDAN, W
- BASHKANOV, M
- BEDNARSKI, T
- BERGMANN, FS
- BERLOWSKI, M
- BHATT, H
- BUSCHER, M
- CALEN, H
- CLEMENT, H
- CODERRE, D
- CZERWINSKI, E
- DEMMICH, K
- DOROSHKEVICH, E
- ENGELS, R
- ERVEN, W
- EYRICH, W
- FEDORETS, P
- FOHL, K
- FRANSSON, K
- GOLDENBAUM, F
- GOSLAWSKI, P
- GOSWAMI, A
- GRIGORYEV, K
- GULLSTROM, CO
- HAUENSTEIN, F
- HEIJKENSKJOLD, L
- HEJNY, V
- HINTERBERGER, F
- HODANA, M
- HOISTAD, B
- JANY, A
- JANY, BR
- JARCZYK, L
- JOHANSSON, T
- KAMYS, B
- KEMMERLING, G
- KHAN, FA
- KHOUKAZ, A
- KISTRYN, S
- KLAJA, J
- KLEINES, H
- KLOS, B
- KRAPP, M
- KRZEMIEN, W
- KULESSA, P
- KUPSC, A
- LALWANI, K
- LERSCH, D
- LI, L
- LORENTZ, B
- MAGIERA, A
- MAIER, R
- MARCINIEWSKI, P
- MARIANSKI, B
- MIKIRTYCHIANTS, M
- MORSCH, HP
- MOSKAL, P
- NANDI, BK
- NIEDZWIECKI, S
- OHM, H
- OZERIANSKA, I
- DEL RIO, EP
- PLUCINSKI, P
- PODKOPAL, P
- PRASUHN, D
- PRICKING, A
- PSZCZEL, D
- PYSZ, K
- PYSZNIAK, A
- REDMER, CF
- RITMAN, J
- ROY, A
- RUDY, Z
- SAWANT, S
- SCHADMAND, S
- SCHMIDT, A
- SEFZICK, T
- SERDYUK, V
- SHAH, N
- SIEMASZKO, M
- SIUDAK, R
- SKORODKO, T
- SKURZOK, M
- SMYRSKI, J
- SOPOV, V
- STASSEN, R
- STEPANIAK, J
- STEPHAN, E
- STERZENBACH, G
- STOCKHORST, H
- STROEHER, H
- SZCZUREK, A
- TOLBA, T
- TRZCINSKI, A
- VARMA, R
- VLASOV, P
- WAGNER, GJ
- WEGLORZ, W
- WOLKE, M
- WRONSKA, A
- WUSTNER, P
- WURM, P
- YAMAMOTO, A
- YUAN, X
- YUREV, L
- ZABIEROWSKI, J
- ZHENG, C
- ZIELINSKI, MJ
- ZIPPER, W
- ZLOMANCZUK, J
- ZUPRANSKI, P
- ZUREK, M
DOIAbstract
Exclusive and kinematically complete high-statistics measurements of the basic double-pionic fusion reactions pn -> d pi(0)pi(0), pn -> d pi(+)pi(-) and pp -> d pi(+)pi(0) have been carried out simultaneously over the energy region of the ABC effect using the WASA detector setup at COSY. Whereas the isoscalar reaction part given by the d pi(0)pi(0) channel exhibits the ABC effect, i.e. a low-mass enhancement in the pi pi-invariant mass distribution, as well as the associated resonance structure in the total cross section, the isovector part given by the d pi(+)pi(0) channel shows a smooth behavior consistent with the conventional t-channel Delta Delta process. The d pi(+)pi(-) data are very well reproduced by combining the data for isovecto...
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