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Some Interesting Phenomena Observed in Cosmic-Ray
Experiments
by Means of X-Ray Emulsion
Technique at Super Accelerator Energies
Borisov A. S., Maximenko V. M., Puchkov V. S.,
Pyatovsky S. E.,
Slavatinsky S. A., Vargasov A. V., Mukhamedshin R. A.
In the energy range above the PCR "knee" (5-1000 PeV),
the emulsion chamber data exhibit some new features which are hard to
explain in the framework of the Standard Model. In this survey the results
of a systematic quest of some new and exotic types of events which are
observed in the Pamir emulsion chamber experiment are presented,
namely, huge "halo" events, coplanar events, penetrating hadrons with
abnormally weak absorption in lead, "Centauro"-type events. Possible theoretical
approaches for their explanation are discussed.
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