ZH production in gluon fusion at NLO in QCD
Long Chen, Joshua Davies, Gudrun Heinrich, Stephen Jones, Matthias Kerner, Go Mishima, Johannes Schlenk, Matthias Steinhauser
Abstract
A bstract We present fully differential next-to-leading order results for Higgs production in association with a Z boson in gluon fusion. Our two-loop virtual contributions are evaluated numerically using sector decomposition, including full top-quark mass effects, and supplemented at high p T by an analytic high-energy expansion to order $$ {m}_Z^4,{m}_H^4,{m}_t^{32} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>m</mml:mi> <mml:mi>Z</mml:mi> <mml:mn>4</mml:mn> </mml:msubsup> <mml:mo>,</mml:mo> <mml:msubsup> <mml:mi>m</mml:mi> <mml:mi>H</mml:mi> <mml:mn>4</mml:mn> </mml:msubsup> <mml:mo>,</mml:mo> <mml:msubsup> <mml:mi>m</mml:mi> <mml:mi>t</mml:mi> <mml:mn>32</mml:mn> </mml:msubsup> </mml:math> . Using the expanded results we also present a study of the top-quark mass scheme uncertainty at large p T .