Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction Federico Demartin, Fabio Maltoni, Kentarou Mawatari, Ben Page and Marco Zaro Eur. Phys. J. C, 74 9 (2014) 3065 Published online: 23 September 2014 DOI: 10.1140/epjc/s10052-014-3065-2