Low Energy Antikaon-nucleon/nuclei interaction studies by AMADEUS

K. Piscicchia, M. Bazzi, G. Belloti, A. M. Bragadireanu, D. Bosnar, A. D. Butt, M. Cargnelli, C. Curceanu, R. Del Grande, L. De Paolis, L. Fabbietti, C. Fiorini (+24 others)
2019 EPJ Web of Conferences  
The AMADEUS experiment at the DAΦNE collider of LNF-INFN deals with the investigation of the at-rest, or low-momentum, K − interactions in light nuclear targets, with the aim to constrain the low energy QCD models in the strangeness sector. The 0 step of the experiment consisted in the reanalysis of the 2004/2005 KLOE data, exploiting K − absorptions in H, 4 He, 9 Be and 12 C, leading to the first invariant mass spectroscopic study with very low momentum (about 100 MeV) in-flight K − captures.
more » ... ight K − captures. With AMADEUS step 1 a dedicated pure Carbon target was implemented in the central region of the KLOE detector, providing a high statistic sample of pure at-rest K − nuclear interaction. The first measurement of the non-resonant transition amplitude |A K − n→Λπ − | at √ s =33 MeV below the KN threshold is presented, in relation with the Λ(1405) properties studies. The analysis procedure adopted in the serarch for K − multinucleon absorption cross sections and Branching Ratios will be also described.
doi:10.1051/epjconf/201919901014 fatcat:nluvyz2fsraftdhfzmip7rk6le