Search for the $\eta$-mesic $^{4}He$ with WASA-at-COSY

doi:10.1051/epjconf/20146609009

Search for the $\eta$-mesic $^{4}He$ with WASA-at-COSY

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dc.contributor.author	Krzemień, Wojciech [SAP12018791]	pl
dc.contributor.author	Moskal, Paweł [SAP11015350]	pl
dc.contributor.author	Smyrski, Jerzy [SAP11011139]	pl
dc.contributor.author	Skurzok, Magdalena [SAP14017204]	pl
dc.date.accessioned	2015-06-10T15:57:31Z
dc.date.available	2015-06-10T15:57:31Z
dc.date.issued	2014	pl
dc.identifier.isbn	978-2-7598-1175-5 (volume 1)	pl
dc.identifier.isbn	978-2-7598-1176-2 (volume 2)	pl
dc.identifier.issn	2101-6275	pl
dc.identifier.uri	http://ruj.uj.edu.pl/xmlui/handle/item/9276
dc.language	eng	pl
dc.rights	Udzielam licencji. Uznanie autorstwa 2.0	*
dc.rights.uri	http://creativecommons.org/licenses/by/2.0/pl/legalcode	*
dc.title	Search for the $\eta$-mesic $^{4}He$ with WASA-at-COSY	pl
dc.type	JournalArticle	pl
dc.abstract.en	We conduct a search for the He − $\eta$ bound state with the WASA-at-COSY facility measuring the excitation functions for the reaction channels: $dd \rightarrow ^{3}Hep \pi^{-}$ and $dd \rightarrow ^{3}Hen \pi^{0}$, where the outgoing N − π pairs originate from the conversion of the $\eta$ meson on a nucleon inside the He nucleus. Two dedicated experiments were performed at the Cooler Synchrotron COSY-Jülich with the WASA detector. The analysis of the 2008 data shows no signal of the $^{4}He− \eta$ bound state. An upper limit for the cross-section for the bound state formation and decay in the process $dd \rightarrow (^{4}He- \eta)_{bound} \rightarrow ^{3}Hep \pi^{-}$, was determined at the 90 % confidence level. In November 2010 a new data set was collected.	pl
dc.description.volume	66	pl
dc.description.publication	0,34	pl
dc.description.conftype	international	pl
dc.identifier.doi	10.1051/epjconf/20146609009	pl
dc.identifier.eissn	2100-014X	pl
dc.title.journal	EPJ Web of Conferences	pl
dc.title.volume	INPC 2013 – International Nuclear Physics Conference, Firenze, Italy, June 2-7, 2013	pl
dc.contributor.institution	WASA-at-COSY Collaboration	pl
dc.language.container	eng	pl
dc.affiliation	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego	pl
dc.subtype	ConferenceProceedings	pl
dc.conference	INPC 2013 – International Nuclear Physics Conference; 2013-06-02; 2013-06-07; Florencja; Włochy; indeksowana w Web of Science; indeksowana w Scopus; ;	pl
dc.identifier.articleid	09009	pl
dc.rights.original	CC-BY; otwarte czasopismo; ostateczna wersja wydawcy; w momencie opublikowania; 0;	pl
dc.identifier.project	ROD UJ / P	pl