Search for the manifestation of the mesic-nuclei on the dd-->3HeNpi excitation function measured with WASA-at-COSY

Abstract

We search for an evidence of eta-mesic 4He with the WASA-at-COSY detector. Two dedicated experiments were performed at the Cooler Synchrotron COSY-Juelich. The experimental method is based on the measurement of the excitation functions for the two reaction channels: dd-->3Heppi- and dd-->3Henpi0, where the outgoing N-pi pairs originate from the conversion of the eta meson on a nucleon inside the He nucleus. In this contribution, the experimental method is shortly described and preliminary excitation functions from the 2010 data are presented.

8 pages, 12 figures, Presented at International Symposium on Mesic Nuclei, Krakow, Sept. 20, 2013

References in corpus (5)

• 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

Cited by in corpus (5)

• $\eta$-nucleus interaction from the $d+d$ reaction around the $\eta$ production threshold
• Luminosity determination for the deutron-deutron reactions using free and quasi-free reactions with WASA-at-COSY detector
• Search for the eta-mesic Helium bound state with the WASA-at-COSY facility
• 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