# 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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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics Physical Sciences > Engineering (miscellaneous) Physical Sciences > Physics and Astronomy (miscellaneous) English 2016 30 Dec 2016 07:17 26 Jan 2022 11:02 Springer 1434-6044 Gold Publisher DOI. An embargo period may apply. https://doi.org/10.1140/epjc/s10052-016-3965-4 : FunderSNSF: Grant IDPZ00P2_154829: Project TitleAutomated calculations of electroweak corrections at the LHC