On-shell interference effects in Higgs boson final states

Englert, Christoph; Low, Ian; Spannowsky, Michael

doi:10.1103/physrevd.91.074029

On-shell interference effects in Higgs boson final states

Englert, Christoph; Low, Ian; Spannowsky, Michael

Authors

Christoph Englert

Ian Low

Professor Michael Spannowsky michael.spannowsky@durham.ac.uk
Director

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 Higgs-like signal neglecting interference effects. In this paper, we perform a study of such “on-shell” interference effects in p p → Z Z and find that they lead to a ≲ O ( 30 % ) width scheme-dependent 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.

Citation

Englert, C., Low, I., & Spannowsky, M. (2015). On-shell interference effects in Higgs boson final states. Physical Review D, 91(7), Article 074029. https://doi.org/10.1103/physrevd.91.074029

Journal Article Type	Article
Online Publication Date	Apr 29, 2015
Publication Date	Apr 29, 2015
Deposit Date	Nov 10, 2016
Publicly Available Date	May 31, 2018
Journal	Physical Review D
Print ISSN	2470-0010
Electronic ISSN	2470-0029
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	91
Issue	7
Article Number	074029
DOI	https://doi.org/10.1103/physrevd.91.074029

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Copyright Statement
Reprinted with permission from the American Physical Society: Englert, Christoph, Low, Ian & Spannowsky, Michael (2015). On-shell interference effects in Higgs boson final states. Physical Review D 91(7): 074029. © 2015 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.