HE Stratosphere Event of 1975 Revisited: the Difference Between the Patterns of Astroparticle Interaction and LHC Nucleus-Nucleus Collision

The event of astroparticle collision at high energy was detected in 1975during the balloon flight in the stratosphere. The data of hundred particletracks in x-ray films have been re-analyzed in the style of LHC experiments:rapidity distributions of charged particles and transverse mass spectra ofmulti-particle production have been built. The comparison of multiplehistograms with the expectations of the Quark-Gluon String Model (QGSM) givesus, at first sight, the conclusion that it might be the carbon-nucleuscollision with the matter of atmosphere at the c.m.s. equivalent energy√(s)≥ 5 TeV. Nevertheless, the data indicate the features that cannotbe associated with nucleus-nucleus collision: one particle with transverse mass16 GeV was detected and a small nucleon population has been seen in the regionof projectile fragmentation that does not correspond to the carbon nucleuscollision. 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 hugegravitation pressure in giant massive objects like Black Holes. Relativisticjets are spreading the baryonic DM in space. The important difference betweenthis form of matter and the ordinary nucleus lies in the results of collision:baryonic DM is the object, where protons and antiprotons are stronglyconnected, so the energy is divided between nucleon components due to thestructure function of Regge type, like for quarks in the proton. The lightestdebris of baryonic DM particle interacts with the greatest maximal rapidity andgives the small number of nucleons in the forwarding part of spectra. BaryonicDM can also split into the pair of similar DM with lower mass giving an unusualcouple of hadrons with mass like 14 GeV and heavier.