New analysis method for CCD X-ray data

The analysis method developed for kaonic nitrogen X-ray data obtained at the DAΦΦNE electron–positron collider of Frascati National Laboratories using Charge-Coupled Devices (CCDs) in the DEAR experimental setup is described. Background events could be highly rejected by this analysis procedure. Three sequential X-ray lines from kaonic nitrogen transitions, showing good energy resolution, could be clearly identified, and the yields measured for the first time.