Test of BFKL with double tagged γ∗γ∗ events

Double tagged interactions of photons with virtualities Q2 between 10 GeV2 and 200 GeV2 are analysed with the data collected by DELPHI detector from 1998 to 2000, corresponding to an integrated luminosity of 550 pb−1. The cross section of the reaction γ∗γ∗→hadrons is measured and compared to the LO and NLO BFKL calculations.