Measurement of the differential cross section of highly boosted top quarks as a function of their transverse momentum in $\sqrt{s} = 8$ TeV proton-proton collisions using the ATLAS detector

The measurement of the $t\bar{t}$ differential cross section for high $p_T$ top quarks as a function of their transverse momentum using a sample of 20.3 $fb^{-1}$, collected in pp collisions from the ATLAS detector is presented. The techniques used in the analysis to reconstruct and identify the hadronic top quark with high Lorentz boost increase the detection efficiency and allow to extend the measurement in the TeV region. The observed yield is corrected for detector effects and the differential cross section obtained is compared with several theoretical predictions both in a fiducial region than extrapolated to the full phase space.