Studying squark mass spectrum through gluino decay at 100 TeV future hadron colliders

So Chigusa,Koichi Hamaguchi,Takeo Moroi,Atsuya Niki,Kosaku Ono

doi:10.1016/j.physletb.2021.136332

So Chigusa, Koichi Hamaguchi + Show 3 more

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https://doi.org/10.1016/j.physletb.2021.136332

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Abstract

We study the prospect of determining the decay properties of the gluino in the supersymmetric (SUSY) standard model at a 100 TeV future hadron collider. We consider the case where the neutral Wino is the lightest superparticle. In this case, the long-lived charged Wino can be used to eliminate standard model backgrounds, which enables us to study the details of superparticles. We show that, based on the analysis of the numbers of high pT leptons, boosted W-jets, and b-tagged jets, we may determine the gaugino species and the quark flavors in the gluino decay. With such determinations, we can obtain information about the mass spectrum of squarks even if squarks are out of the kinematical reach.

Highlights

Collider experiments at the energy frontier are important in understanding the properties of elementary particles
Despite the success of the standard model (SM), it is widely believed that the SM is not the ultimate theory and that there should show up physics beyond the SM (BSM)
This is because there are still mysteries that cannot be explained in the framework of the SM; for example, from the particle physics point of view, the charge quantization (which is naturally explained in the grand unified theory (GUT)) cannot be explained in the standard model, and from cosmology point of view, the origin of dark matter is not understood

Summary

Introduction

Collider experiments at the energy frontier are important in understanding the properties of elementary particles. In the supersymmetric (SUSY) SM with the Wino lightest superparticle (LSP), the thermal Wino can become dark matter if its mass is about 2.9 TeV and such a model is well motivated Such a heavy Wino is out of the reach of the LHC experiment [3]. It has been pointed out that the mass spectrum of the gauginos and the lifetime of the charged Wino can be studied at the FCC-hh after the discovery of the Wino LSP [10, 11]. We adopt the mass spectrum of the gauginos suggested by the model of pure gravity mediation; the sample points adopted in our analysis are summarized, in which the Bino, Wino, and gluino production masses In the limit of μ mB/WmW , the partial decay rates of the dominant decay processes of the Bino are insensitive to the sfermion masses, and the Bino dominantly decays into W ±W ∓ or W 0h with branching fractions of

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Numerical results

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Summary