Pseudoscalar pair production via off-shell Higgs in composite Higgs models
Journal article, 2020

We propose a new type of search for a pseudoscalar particle η pair produced via an off-shell Higgs, pp→h∗→ηη. The search is motivated by a composite Higgs model in which the η is extremely narrow and decays almost exclusively into Zγ in the mass range 65 GeV≲mη≲160 GeV. We devise an analysis strategy to observe the novel ZγZγ channel and estimate potential bounds on the Higgs-η 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.





Diogo Buarque Franzosi

Chalmers, Physics, Subatomic and Plasma Physics

Gabriele Ferretti

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Li Huang

University of Kansas

Jing Shu

Beijing University of Technology

Chinese Academy of Sciences

SciPost Physics

25424653 (eISSN)

Vol. 9 077 077

Solving the Higgs Fine-Tuning Problem with Top Partners

Knut and Alice Wallenberg Foundation (1013613), 2018-01-01 -- 2022-12-31.

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Subatomic Physics

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