Search for the 3He-eta bound state at COSY-11

Abstract

We have measured excitation function for dp -> ppp_pi- reaction near the eta production threshold. We observe an enhancement of the counting rate above the threshold which can originate from the production of the eta meson in the reaction dp -> 3He eta and its subsequent absorption on neutron in the 3He nucleus leading to creation of the p_pi- pair.

Presented at 10th International Workshop on Meson Production, Properties and Interaction (MESON 2008), Cracow, Poland, 6 - 10 June 2008, 4 pages, 4 figures,references added

References in corpus (4)

• Photoproduction of eta-mesic 3He
• Precision study of the eta-3He system using the d+p->3He+eta reaction
• Measurement of the dp -->3He eta reaction near threshold
• Is there an eta-3He quasi--bound state ?

Cited by in corpus (10)

• Search for the eta-mesic 4He with WASA-at-COSY detector
• Search for He-eta bound states with the WASA-at-COSY facility
• Upper limits for the production of the eta-mesic Helium in the dd ->3Henpi0 and dd -> 3Heppi- reactions
• Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV
• Status and Perspectives of the Search for Eta-Mesic Nuclei
• Search for the manifestation of the mesic-nuclei on the dd-->3HeNpi excitation function measured with WASA-at-COSY
• Luminosity determination for the deutron-deutron reactions using free and quasi-free reactions with WASA-at-COSY detector
• Status of the search for $\eta$-mesic nuclei with particular focus on $\eta$-Helium bound states
• Search for the 4He-eta bound state in dd->(4He-eta)_{bound}->3He n pi0 and dd->(4He-eta)_{bound}->3He p pi- reactions with the WASA-at-COSY facility
• Production and interaction of the eta meson with nucleons and nuclei