Search for disoriented chiral condensate in cosmic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi></mml:math>-hadron families

We present a systematic study of the large asymmetries in neutral pion fraction distribution in high energy cosmic ray families $(100 \mathrm{TeV}&lt;{E}_{\mathrm{vis}}&lt;700 \mathrm{TeV})$ detected at high mountain altitudes at Pamir (4300 m, 595 ${\mathrm{g}/\mathrm{c}\mathrm{m}}^{2}).$ With this in mind we have constructed robust observables, ratios of factorial moments, in experimental and simulated families in a similar way. We have found that our experimental data do not exclude the possibility of a DCC formation mechanism in high energy interactions.