Measurement of colour flow with the jet pull angle in tt- events using the ATLAS detector at √s=8 TeV

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Abstract

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 tt- 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 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.

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Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., … Zwalinski, L. (2015). Measurement of colour flow with the jet pull angle in tt- events using the ATLAS detector at √s=8 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 750, 475–493. https://doi.org/10.1016/j.physletb.2015.09.051

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