Abstract
A measurement of the correlations between the polar angles of leptons from the decay of pair-produced and quarks in the helicity basis is reported, using proton-proton collision data collected by the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of at a center-of-mass energy of collected during 2011. Candidate events are selected in the dilepton topology with large missing transverse momentum and at least two jets. The angles and between the charged leptons and the direction of motion of the parent quarks in the rest frame are sensitive to the spin information, and the distribution of is sensitive to the spin correlation between the and quarks. The distribution is unfolded to parton level and compared to the next-to-leading order prediction. A good agreement is observed.
- Received 27 October 2015
DOI:https://doi.org/10.1103/PhysRevD.93.012002
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© 2016 CERN, for the ATLAS Collaboration