Speaker
Hiroyuki Fujioka
(Kyoto University)
Description
Very recently, four candidates of the tetraneutron state were observed in the 4He(8He,8Be) reaction at RIBF [1]. While the experiment will be continued aiming at higher statistics, the confirmation of such an exotic state with a different reaction is important. We propose a pion DCX (double charge exchange) reaction to populate a tetraneutron state via the 4He(pi-,pi+) reaction. In order to overcome a very low formation cross section, a high-intensity pion beam at the HIHR beamline, planned to be constructed in J-PARC, will be utilized. In this contribution, we will discuss the experimental concept. [1] K. Kisamori et al. Phys. Rev. Lett. 116, 052501 (2016).
