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

Research output: Contribution to journalJournal article

  • ATLAS Collaboration
<mark>Journal publication date</mark>26/09/2015
<mark>Journal</mark>Physics Letters B
Number of pages19
Pages (from-to)475-493
<mark>Original language</mark>English


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.