title: Higgs Boson Pair Production in Gluon Fusion at Next-to-Leading Order with Full Top-Quark Mass Dependence.
abstract: We present the calculation of the cross section and invariant mass distribution for Higgs boson pair production in gluon fusion at next-to-leading order (NLO) in QCD. Top-quark masses are fully taken into account throughout the calculation. The virtual two-loop amplitude has been generated using an extension of the program GoSam supplemented with an interface to Reduze for the integral reduction. The occurring integrals have been calculated numerically using the program SecDec. Our results, including the full top-quark mass dependence for the first time, allow us to assess the validity of various approximations proposed in the literature, which we also recalculate. We find substantial deviations between the NLO result and the different approximations, which emphasizes the importance of including the full top-quark mass dependence at NLO.
authors.affiliation: Institute for Physics, Universität Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, USA.
authors.forename: S
authors.initials: S
authors.lastname: Borowka
authors.affiliation: Institute for Physics, Universität Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
authors.forename: N
authors.initials: N
authors.lastname: Greiner
authors.affiliation: Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Heinrich
authors.affiliation: Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany.
authors.forename: S P
authors.initials: SP
authors.lastname: Jones
authors.affiliation: Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Kerner
authors.affiliation: Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Schlenk
authors.affiliation: Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany.
authors.forename: U
authors.initials: U
authors.lastname: Schubert
authors.affiliation: Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Zirke