uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Search for eta-mesic He-4 with the WASA-at-COSY detector
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
Show others and affiliations
2013 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 87, no 3, 035204- p.Article in journal (Refereed) Published
Abstract [en]

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. 

Place, publisher, year, edition, pages
2013. Vol. 87, no 3, 035204- p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-198390DOI: 10.1103/PhysRevC.87.035204ISI: 000316105300002OAI: oai:DiVA.org:uu-198390DiVA: diva2:616174
Available from: 2013-04-15 Created: 2013-04-15 Last updated: 2013-04-15Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Adlarson, PatrikCalén, HansFransson, KjellGullström, Carl-OscarHeijkenskjöld, LenaHoistad, BoJohansson, TordKupsc, AndrzejMarciniewski, PawelPszczel, DamianPyszniak, AndrzejWolke, MagnusZlomanczuk, Jozef
By organisation
Nuclear Physics
In the same journal
Physical Review C. Nuclear Physics
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 505 hits
ReferencesLink to record
Permanent link

Direct link