  The distribution and orientation of energy inside jets is predicted to be an
experimental handle on colour connections between the hard--scatter quarks and
gluons initiating the jets. This Letter presents a measurement of the
distribution of one such variable, the jet pull angle. The pull angle is
measured for jets produced in $t\bar{t}$ events with one $W$ boson decaying
leptonically and the other decaying to jets using 20.3 fb$^{-1}$ of data
recorded with the ATLAS detector at a centre-of-mass energy of $\sqrt{s}=8$ TeV
at the LHC. The jet pull angle distribution is corrected for detector
resolution and acceptance effects and is compared to various models.
