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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/16143

Title: Search for eta-mesic He-4 with the WASA-at-COSY detector
Authors: 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
STROHER, 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
Issue Date: 2013
Publisher: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW C, 87(3)
Abstract: An exclusive measurement of the excitation function for the dd -> (3)Hep pi(-) reaction was performed at the Cooler Synchrotron COSY-Julich with the WASA-at-COSY detection system. The data were taken during a slow acceleration of the beam from 2.185 to 2.400 GeV/c crossing the kinematic threshold for the eta-meson production in the dd -> He-4 eta reaction at 2.336 GeV/c. The corresponding excess energy with respect to the He-4-eta system varied from -51.4 to 22 MeV. The integrated luminosity in the experiment was determined using the dd -> (3)Hen reaction. The shape of the excitation function for the dd -> (3)Hep pi(-) reaction was examined. No signal of the He-4-eta bound state was observed. An upper limit for the cross section for the bound state formation and decay in the process dd -> (He-4-eta)(bound) -> (3)Hep pi(-) was determined on the 90% confidence level and it varies from 20 to 27 nb for the bound state width ranging from 5 to 35 MeV, respectively. DOI: 10.1103/PhysRevC.87.035204
URI: http://dx.doi.org/10.1103/PhysRevC.87.035204
http://dspace.library.iitb.ac.in/jspui/handle/100/16143
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