New limits on di-nucleons decay into invisible channels
V. I. Tretyak, V. Yu. Denisov, Yu. G. Zdesenko
Institute for Nuclear Research, MSP 03680 Kiev, Ukraine
PACS: 11.30.-j, 12.60.-i, 29.40.Mc
Abstract
Data of the radiochemical experiment (E.L. Fireman, 1978) with 1.7
t of KC2H3O2, accumulated deep underground during 1 yr, were
reanalyzed to set limits on di-nucleons (nn and np) decays into
invisible channels (disappearance, decay into neutrinos, etc.). The obtained
lifetime bounds
τnp>2.1• 1025 yr and
τnn>4.2• 1025 yr (at 90% C.L.)
are better (or competitive) than those
established in the recent experiments.