Gravitino vs. neutralino LSP at the LHC

Author:

Kim Jong Soo,Pokorski Stefan,Rolbiecki Krzysztof,Sakurai Kazuki

Abstract

Abstract Using the latest LHC data, we analyse and compare the lower limits on the masses of gluinos and the lightest stop in two natural supersymmetric motivated scenarios: one with a neutralino being the lightest supersymmetric particle (LSP) and the other one with gravitino as the LSP and neutralino as the next-to-lightest supersymmetric particle. In the second case our analysis applies to neutralinos promptly decaying to very light gravitinos, which are of cosmological interest, and are generic for low, of order $$ \mathcal{O} $$ O (100) TeV, messenger scale in gauge mediation models. We find that the lower bounds on the gluino and the lightest stop masses are stronger for the gravitino LSP scenarios due to the extra handle from the decay products of neutralinos. Generally, in contrast to the neutralino LSP case the limits now extend to a region of compressed spectrum. In bino scenarios the highest excluded stop mass increases from 1000 GeV to almost 1400 GeV. Additionally, in the higgsino-like NLSP scenario the higgsinos below 650 GeV are universally excluded and the stop mass limit is $$ {m}_{\tilde{t}} $$ m t ˜ > 1150 GeV, whereas there is no limit on stops in the higgsino LSP model for $$ {m}_{\tilde{h}} $$ m h ˜ = 650 GeV. Nevertheless, we find that the low messenger scale still ameliorates the fine tuning in the electroweak potential.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Cited by 10 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Revisiting cosmological constraints on supersymmetric SuperWIMPs;The European Physical Journal C;2024-07-05

2. Collider constraints on electroweakinos in the presence of a light gravitino;The European Physical Journal C;2023-06-10

3. Searching for a single photon from lightest neutralino decays in R-parity-violating supersymmetry at FASER;Journal of High Energy Physics;2023-02-13

4. Theoretical Background;Electroweak Gauginos with Highly Boosted Hadronically Decaying Bosons at the LHC;2023

5. Supersymmetric explanation of the muon g – 2 anomaly with and without stable neutralino;Journal of High Energy Physics;2022-08-10

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