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arXiv · 2008.12773

Collider searches of scalar singlets across lifetimes

Elina Fuchs·Oleksii Matsedonskyi·Inbar Savoray·Matthias Schlaffer
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Abstract

Spin-0 singlets arise in well-motivated extensions of the Standard Model. Their lifetime determines the best search strategies at hadron and lepton colliders. To cover a large range of singlet decay lengths, we investigate bounds from Higgs decays into a pair of singlets, considering signatures of invisible decays, displaced and delayed jets, and coupling fits of untagged decays. We examine the generic scalar singlet and the relaxion, and derive a matching as well as qualitative differences between them. For each model, we discuss its natural parameter space and the searches probing it.

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Elina Fuchs, Oleksii Matsedonskyi, Inbar Savoray, Matthias Schlaffer. 2020-08-28. Collider searches of scalar singlets across lifetimes. https://doi.org/10.1007/jhep04(2021)019

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