A study of the substructure of jets with transverse momentum greater than 400 GeV/c produced in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron Collider and recorded by the CDF II detector is presented. The distributions of the jet mass, angularity, and planar flow are measured for the first time in a sample with an integrated luminosity of 5.95 fb(-1). The observed substructure for high mass jets is consistent with predictions from perturbative quantum chromodynamics. RI Prokoshin, Fedor/E-2795-2012
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