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Interference contributions to gluon initiated heavy Higgs production in the two-Higgs-doublet model


Greiner, Nicolas; Liebler, Stefan; Weiglein, Georg (2016). Interference contributions to gluon initiated heavy Higgs production in the two-Higgs-doublet model. European Physical Journal C - Particles and Fields, 76(3):118.

Abstract

We discuss the production of a heavy neutral Higgs boson of a \(\mathcal {CP}\)-conserving two-Higgs-doublet model in gluon fusion and its decay into a four-fermion final state, \(gg (\rightarrow VV) \rightarrow e^+e^-\mu ^+\mu ^-/e^+e^-\nu _l\bar{\nu }_l\). We investigate the interference contributions to invariant mass distributions of the four-fermion final state and other relevant kinematical observables. The relative importance of the different contributions is quantified for the process in the on-shell approximation, gg\rightarrow ZZ\). We show that interferences of the heavy Higgs with the light Higgs boson and background contributions are essential for a correct description of the differential cross section. Even though they contribute below \({\mathcal {O}}(10~\%)\) to those heavy Higgs signal cross sections, to which the experiments at the Large Hadron Collider were sensitive in its first run, we find that they are sizable in certain regions of the parameter space that are relevant for future heavy Higgs boson searches. In fact, the interference contributions can significantly enhance the experimental sensitivity to the heavy Higgs boson.

Abstract

We discuss the production of a heavy neutral Higgs boson of a \(\mathcal {CP}\)-conserving two-Higgs-doublet model in gluon fusion and its decay into a four-fermion final state, \(gg (\rightarrow VV) \rightarrow e^+e^-\mu ^+\mu ^-/e^+e^-\nu _l\bar{\nu }_l\). We investigate the interference contributions to invariant mass distributions of the four-fermion final state and other relevant kinematical observables. The relative importance of the different contributions is quantified for the process in the on-shell approximation, gg\rightarrow ZZ\). We show that interferences of the heavy Higgs with the light Higgs boson and background contributions are essential for a correct description of the differential cross section. Even though they contribute below \({\mathcal {O}}(10~\%)\) to those heavy Higgs signal cross sections, to which the experiments at the Large Hadron Collider were sensitive in its first run, we find that they are sizable in certain regions of the parameter space that are relevant for future heavy Higgs boson searches. In fact, the interference contributions can significantly enhance the experimental sensitivity to the heavy Higgs boson.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2016
Deposited On:30 Dec 2016 07:17
Last Modified:02 Feb 2018 11:11
Publisher:Springer
ISSN:1434-6044
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1140/epjc/s10052-016-3965-4

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Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)