The first observation of the neutron-rich hypernucleus image

The FINUDA experiment at image, Frascati, has observed the neutron-rich hypernucleus image by searching for image pairs in coincidence from the image production reaction and the image mesonic weak decay. The production rate of image undergoing this two-body decay has been found to be image. The binding energy of image has been evaluated to be image with respect to image, jointly from production and decay. A similar investigation has been carried out for the observation of the neutron-rich hypernucleus image by looking for the image reaction in coincidence with the image mesonic weak decay; an upper limit for the production rate of image undergoing the two-body decay has been found to be image (90% C.L.).