Differential Higgs Boson Pair Production at Next-to-Next-to-Leading Order in QCD

D. DE FLORIAN,M. GRAZZINI, C. HANGA, S. KALLWEIT, J. LINDERT, P. MAIERHOFER, J. MAZZITELLI, D. RATHLEV

JOURNAL OF HIGH ENERGY PHYSICS - (Online)

springer

Año: 2016 vol. 09 p. 1 - 17

1029-8479

We report on the first fully differential calculation for double Higgs boson production through gluon fusion in hadron collisions up to next-to-next-to-leading order (NNLO) in QCD perturbation theory. The calculation is performed in the heavy-top limit of the Standard Model, and in the phenomenological results we focus on pp collisions at s√=14s=14 TeV. We present differential distributions through NNLO for various observables including the transverse-momentum and rapidity distributions of the two Higgs bosons. NNLO corrections are at the level of 10%-25% with respect to the next-to-leading order (NLO) prediction with a residual scale uncertainty of 5%-15% and an overall mild phase-space dependence. Only at NNLO the perturbative expansion starts to converge yielding overlapping scale uncertainty bands between NNLO and NLO in most of the phase-space. The calculation includes NLO predictions for pp → HH + jet + X. Corrections to the corresponding distributions exceed 50% with a residual scale dependence of 20%-30%.