Abstract
The kaonic deuterium measurement at J-PARC and DAΦNE will provide a piece of information still missing to the antikaon-nucleon interaction close to threshold, providing valuable information to answer one of the most fundamental problems in hadron physics today - to the yet unsolved puzzle of how the hadron mass is generated. For this a new X-ray detector system has been developed to measure the shift and width of the 2p → 1s transition of kaonic deuterium with a precision of 60 eV and 140 eV, respectively.
Highlights
The antikaon-nucleon interaction close to threshold provides crucial information on the interplay between spontaneous and explicit chiral symmetry breaking in low-energy QCD
Several dedicated experiments on kaonic hydrogen spectroscopy performed at KEK [1], DEAR [2] and most recently the SIDDHARTA experiment [3] at DAΦNE yielded important information for theoretical calculations of K−p interactions
Similar to the kaonic hydrogen measurement, the kaonic deuterium measurement will detect the energy shift of the 1s ground state induced by the strong interaction as well as the broadening of the ground state level caused by nuclear absorption
Summary
Developed Silicon Drift Detectors New SDD arrays were developed at FBK together with Milano Politecnico, LNF-INFN and SMI for the kaonic deuterium experiments E57 and SIDDHARTA-2. 3. Recent SDD Tests at the Stefan Meyer Institute First test measurements of stability and energy resolution have shown that the requirements needed for a successful K−d experiment are fulfilled and have been reported in [8].
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