  The event of astroparticle collision at high energy was detected in 1975
during the balloon flight in the stratosphere. The data of hundred particle
tracks in x-ray films have been re-analyzed in the style of LHC experiments:
rapidity distributions of charged particles and transverse mass spectra of
multi-particle production have been built. The comparison of multiple
histograms with the expectations of the Quark-Gluon String Model (QGSM) gives
us, at first sight, the conclusion that it might be the carbon-nucleus
collision with the matter of atmosphere at the c.m.s. equivalent energy
$\sqrt{s} \ge $ 5 TeV. Nevertheless, the data indicate the features that cannot
be associated with nucleus-nucleus collision: one particle with transverse mass
16 GeV was detected and a small nucleon population has been seen in the region
of projectile fragmentation that does not correspond to the carbon nucleus
collision. Both facts make us convinced that there might be a baryonic DM decay
(Piskounova O., 2018). Baryonic DM particles are to be formed at the huge
gravitation pressure in giant massive objects like Black Holes. Relativistic
jets are spreading the baryonic DM in space. The important difference between
this form of matter and the ordinary nucleus lies in the results of collision:
baryonic DM is the object, where protons and antiprotons are strongly
connected, so the energy is divided between nucleon components due to the
structure function of Regge type, like for quarks in the proton. The lightest
debris of baryonic DM particle interacts with the greatest maximal rapidity and
gives the small number of nucleons in the forwarding part of spectra. Baryonic
DM can also split into the pair of similar DM with lower mass giving an unusual
couple of hadrons with mass like 14 GeV and heavier.
