Solving the Crisis in Big-Bang Nucleosynthesis by the Radiative Decay of an Exotic Particle

Erich Holtmann, Masahiro Kawasaki, Takeo Moroi

We discuss a new mechanism which can solve the crisis in standard big-bang nucleosynthesis. A long-lived particle $X$ ($10^{4}sec\lesssim {\tau }_X\lesssim 10^{6}sec$) which decays into…