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Light gravitino dark matter: LHC searches and Hubble tension

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arxiv 2006.09906 v3 pith:RDKI3GLD submitted 2020-06-17 hep-ph astro-ph.CO

classification hep-phastro-ph.CO
keywords cosmologicaldarkgravitinohubblemattersigmatensionbackground
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abstract

The recent measurements of the cosmological parameter $H_0$ from the direct local observations and the inferred value from the Cosmic Microwave Background show $\sim 4 \sigma$ discrepancy. This may indicate new physics beyond the standard $\Lambda$CDM. We investigate the keV gravitino dark matter that has a small fraction of non-thermal component (e.g. from the late decay of NLSP bino) under various cosmological constraints. We find such a scenario is highly predictive and can be tested by searching for the dilepton plus missing energy events at the LHC. Besides, we also discuss its implication for Hubble tension, however, which can be reduced to $3\sigma$ level marginally.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Dark Photons and Gravitino Like Particles: Complete EFT Operator Basis

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A new on-shell method using Young tableaux constructs complete EFT operator bases for massive particles of any spin, applied to dark photons and spin-3/2 gravitino-like particles up to dimension 8.

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