ИСТИНА

We report on the results of charged kaon femtoscopy analysis of the 7 TeV pp collisions at the LHC in the ALICE experiment. KK correlation functions are constructed in 3 multiplicity and 4 kt bins. The KK source parameters are extracted by fitting the correlation functions with Gaussian, describing the source, multiplied by a polynomial background function with free coefficients (baseline). The contributions to the systematic errors from the baseline choice have been studied. The weak increase of the KK Rinv with multiplicity and some evidence on the decrease with kt was observed in kt range (0.2-0.8) GeV/c. For the kt dependence, the charged kaons are found to be complimentary to the neutral ones in their coverage of a larger range in kt (0.2-2.0) GeV/c and a decrease in the Rinv is observed for increasing kt as it is also seen in identical two-pion correlations in these collisions.