Big-bang nucleosynthesis with a long-lived charged massive particle
  including $^4$He spallation processes
  We propose helium-4 spallation processes induced by long-lived stau in
supersymmetric standard models, and investigate an impact of the processes on
light elements abundances. We show that, as long as the phase space of helium-4
spallation processes is open, they are more important than stau-catalyzed
fusion and hence constrain the stau property.
