Production of H H H and H H V (V =γ ,Z ) at the hadron colliders
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 p p →H H H and H H Z within the standard model. In particular, we compute the gluongluon fusion oneloop contributions mediated via heavy quarks in the loop. It is the leading order contribution to p p →H H H process. To the process p p →H H Z , it is nexttonexttoleadingorder (NNLO) contribution in QCD coupling. We also compare this contribution to the nexttoleadingorder (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 centerofmass energy machines. We also study new physics effects in these processes by considering t t H , H H H , H H H H , H Z Z , and H H Z Z interactions as anomalous. The anomalous couplings can enhance the cross sections significantly. The g g →H H H process is specially sensitive to anomalous trilinear Higgs boson selfcoupling. For the g g →H H Z process, there is some modest dependence on anomalous H Z Z couplings.
 Publication:

Physical Review D
 Pub Date:
 February 2018
 DOI:
 10.1103/PhysRevD.97.036006
 arXiv:
 arXiv:1708.03580
 Bibcode:
 2018PhRvD..97c6006A
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 Version to be appeared in PRD