Interference effects for Higgs boson mediatedZ-pair plus jet production

Campbell, John M.; Ellis, R. Keith; Furlan, Elisabetta; Röntsch, Raoul

Abstract

We study interference effects in the production channel Z Z + jet , in particular focusing on the role of the Higgs boson. This production channel receives contributions both from Higgs boson mediated diagrams via the decay H → Z Z (signal diagrams), as well as from diagrams where the Z bosons couple directly to a quark loop (background diagrams). We consider the partonic processes g g g Z Z and g q ¯ q Z Z in which interference between signal and background diagrams first occurs. Since interference is primarily an off-resonant effect for the Higgs boson, we treat the Z bosons as on shell. Thus our analysis is limited to the region above threshold, where the invariant mass of the Z -pair m Z Z satisfies the condition m Z Z > 2 m Z . In the region m Z Z > 300     GeV we find that the interference in the Z Z + jet channel is qualitatively similar to interference in the inclusive Z Z channel. Moreover, the rates are sufficient to study these effects at the LHC once jet-binned data become available.

• Journal Article Type: Article
• Online Publication Date: Nov 25, 2014
• Publication Date: 2014-11
• Deposit Date: Jul 11, 2018
• Journal: Physical Review D
• Print ISSN: 1550-7998
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 90
• Issue: 9
• Article Number: 093008
• DOI: https://doi.org/10.1103/physrevd.90.093008
• Public URL: https://durham-repository.worktribe.com/output/1321752