Search for the eta-mesic Helium bound state with the WASA-at-COSY facility

Abstract

We performed a search for 4He-eta bound state with high statistics and high acceptance with the WASA-at-COSY facility using a ramped beam technique. The signature of eta-mesic nuclei is searched for in dd -> 3Henpi0 and dd -> 3Heppi- reactions by the measurement of the excitation functions in the vicinity of the η production threshold. This paper presents the experimental method and the preliminary results of the data analysis for dd -> 3Henpi0 process.

Proceedings from the 12th International Conference on Nucleus-Nucleus Collisions (NN2015), Catania 2015, June 21-26

References in corpus (9)

• Measurement of the dp -->3He eta reaction near threshold
• Determination of the η'-nucleus optical potential
• Is there an eta-3He quasi--bound state ?
• Formation of eta-prime(958)-mesic nuclei by (p,d) reaction
• QCD symmetries in eta and etaprime mesic nuclei
• Search for Quasi Bound $\eta$ Mesons
• Studies of mesic nuclei via decay reactions
• 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

Cited by in corpus (3)

• Solution of the eta-4He problem with quasi-particle formalism
• Momentum distribution of N${}^{\ast }$ in nuclei
• Systematic few-body analysis of eta-d, eta-3He and eta-4He interaction at low energies