Pseudoscalar pair production via off-shell Higgs in composite Higgs models

Buarque Franzosi, Diogo; Ferretti, Gabriele; Huang, Li; Shu, Jing

doi:10.21468/SciPostPhys.9.5.077

SciPost Physics

Pseudoscalar pair production via off-shell Higgs in composite Higgs models

Diogo Buarque Franzosi, Gabriele Ferretti, Li Huang, Jing Shu

SciPost Phys. 9, 077 (2020) · published 20 November 2020

doi: 10.21468/SciPostPhys.9.5.077
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Abstract

We propose a new type of search for a pseudoscalar particle $\eta$ pair produced via an off-shell Higgs, $pp\to h^*\to \eta\eta$. The search is motivated by a composite Higgs model in which the $\eta$ is extremely narrow and decays almost exclusively into $Z\gamma$ in the mass range $65$ GeV$\lesssim m_\eta \lesssim 160$ GeV. We devise an analysis strategy to observe the novel $Z\gamma Z\gamma$ channel and estimate potential bounds on the Higgs-$\eta$ coupling. The experimental sensitivity to the signatures depends on the power to identify fake photons and on the ability to predict large photon multiplicities. This search allows us to exclude large values of the compositeness scale $f$, being thus complementary to other typical processes.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.9.5.077
TI  - Pseudoscalar pair production via off-shell Higgs in composite Higgs models
PY  - 2020/11/20
UR  - https://scipost.org/SciPostPhys.9.5.077
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 9
IS  - 5
SP  - 077
A1  - Buarque Franzosi, Diogo
AU  - Ferretti, Gabriele
AU  - Huang, Li
AU  - Shu, Jing
AB  - We propose a new type of search for a pseudoscalar particle $\eta$ pair produced via an off-shell Higgs, $pp\to h^*\to \eta\eta$. The search is motivated by a composite Higgs model in which the $\eta$ is extremely narrow and decays almost exclusively into $Z\gamma$ in the mass range $65$ GeV$\lesssim m_\eta \lesssim 160$ GeV. We devise an analysis strategy to observe the novel $Z\gamma Z\gamma$ channel and estimate potential bounds on the Higgs-$\eta$ coupling. The experimental sensitivity to the signatures depends on the power to identify fake photons and on the ability to predict large photon multiplicities. This search allows us to exclude large values of the compositeness scale $f$, being thus complementary to other typical processes.
ER  -

@Article{10.21468/SciPostPhys.9.5.077,
	title={{Pseudoscalar pair production via off-shell Higgs in composite Higgs models}},
	author={Diogo Buarque Franzosi and Gabriele Ferretti and Li Huang and Jing Shu},
	journal={SciPost Phys.},
	volume={9},
	pages={077},
	year={2020},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.9.5.077},
	url={https://scipost.org/10.21468/SciPostPhys.9.5.077},
}

Cited by 5

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¹ Diogo Buarque Franzosi,
Gabriele Ferretti,
Li Huang,
Jing Shu

Funders for the research work leading to this publication