Multiplicity distributions in gravitational and strong interactions
  The multiplicity distributions produced by the variation of time-dependent
gravitational fields in a conformally flat background geometry belong to the
same class of infinitely divisible distributions found, for fixed centre of
mass energies and symmetric (pseudo)rapidity intervals, in charged
multiplicities produced in $pp$, $p\overline{p}$ and in heavy ion collisions.
Apparently unrelated multiplicity distributions are classified in terms of the
(positive) discrete representations of the $SU(1,1)$ group. The gravitational
analogy suggest a global high-energy asymptote for the distributions measured
in $pp$ and $p\overline{p}$ collisions. Second-order cross correlations between
positively and negatively charged distributions represent a relevant diagnostic
for a closer scrutiny of the multiparticle final state.
