ALIGNMENT PHENOMENON IN GAMMA FAMILIES WITH ENERGIES 100–1000 TEV

According to Pamir X-ray Emulsion Chamber (XEC) experimental data at the energies E est > 2 × 10 16 eV the fraction of events with four "aligned" most energetic particles increases sharply for families without leading secondary particles. That energy dependence is not described by Quark Gluon String Models.

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