Production of HHH and HHV(V=γ,Z) at the hadron colliders
(2018) Physical Review D, Particles, Fields, Gravitation and Cosmology — Vol. D97, p. 36006 (2018)
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- Abstract
- We consider the production of two Higgs bosons in association with a gauge boson or another Higgs boson at the hadron colliders. We compute the cross sections and distributions for the processes pp→HHH and HHZ within the standard model. In particular, we compute the gluon-gluon fusion one-loop contributions mediated via heavy quarks in the loop. It is the leading order contribution to pp→HHH process. To the process pp→HHZ, it is next-to-next-to-leading-order (NNLO) contribution in QCD coupling. We also compare this contribution to the next-to-leading-order (NLO) QCD contribution to this process. The NNLO contribution can be similar to NLO contribution at the Large Hadron Collider (LHC), and significantly more at higher center-of-mass energy machines. We also study new physics effects in these processes by considering ttH, HHH, HHHH, HZZ, and HHZZ interactions as anomalous. The anomalous couplings can enhance the cross sections significantly. The gg→HHH process is specially sensitive to anomalous trilinear Higgs boson self-coupling. For the gg→HHZ process, there is some modest dependence on anomalous HZZ couplings.
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Shivaji, A. K., & et al. (2018). Production of HHH and HHV(V=γ,Z) at the hadron colliders. Physical Review D, Particles, Fields, Gravitation and Cosmology, D97, 36006. https://doi.org/10.1103/PhysRevD.97.036006 (Original work published 2018)