Onshell interference effects in Higgs boson final states
Abstract
Top quark loops in Higgs production via gluon fusion at large invariant final state masses can induce important interference effects in searches for additional Higgs bosons as predicted in, e.g., Higgs portal scenarios and the minimal supersymmetric Standard Model when the heavy scalar is broad or the final state resolution is poor. Currently, the limit setting as performed by both ATLAS and CMS is based on injecting a heavy Higgslike signal neglecting interference effects. In this paper, we perform a study of such "onshell" interference effects in p p →Z Z and find that they lead to a ≲O (30 %) width schemedependent modification of the signal strength. Including the continuum contributions to obtain, e.g., the full p p →Z Z →4 ℓ final state, this modification is reduced to the 10% level in the considered intermediate mass range.
 Publication:

Physical Review D
 Pub Date:
 April 2015
 DOI:
 10.1103/PhysRevD.91.074029
 arXiv:
 arXiv:1502.04678
 Bibcode:
 2015PhRvD..91g4029E
 Keywords:

 14.80.Bn;
 12.38.Bx;
 13.85.Qk;
 Standardmodel Higgs bosons;
 Perturbative calculations;
 Inclusive production with identified leptons photons or other nonhadronic particles;
 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment
 EPrint:
 7 pages, 4 figures