GravitinoPack and late decays involving gravitinos
  In this talk, we present the package GravitinoPack that calculates decays of
unstable supersymmetric particles, involving gravitinos in the final or initial
state. If the gravitino is the dark matter particle and therefore stable, the
package calculates the decays of the lightest neutralino, and the lighter stau
or stop NLSP into the gravitino LSP and one or two Standard Model particles. On
the other hand, assuming that the gravitino is unstable, GravitinoPack
calculates all its two-body and the three-body decay widths to the neutralino
LSP and Standard Model particles. Since all these decays, involving the
gravitino, are of gravitational nature, the lifetime of the decaying particle
can be of the order of seconds are more, hence called "late decays". The
precise knowledge of all these partial decay widths enables the user to apply
accurately the relevant cosmological constraints.
