We calculate the away-side hadron-triggered modification factor I AA in AA collisions at RHIC and LHC energies for scenarios with and without quark-gluon plasma formation in pp collision. We find that for both scenarios theoretical results for I AA agree well with the available data for 2. 76 TeV Pb + Pb and 0. 2 TeV Au + Au collisions. We make predictions for I AA in 7TeV O + O collisions that are planned at the LHC. Our results show that measuring I OO in the whole centrality interval and at small centrality (5%) may give information on the presence of jet quenching in pp collisions.
B. G. Zakharov (Mon,) studied this question.