Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 9, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP09(2016)151
Keywords
NLO Computations; QCD Phenomenology
Categories
Funding
- Swiss National Science Foundation (SNF) [CRSII2-141847, 200021-156585]
- Research Executive Agency (REA) of the European Union [PITN-GA-2012-316704]
- Swiss National Science Foundation (SNF) [200021_156585] Funding Source: Swiss National Science Foundation (SNF)
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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 root s = 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%.
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