Signatures of Axinos and Gravitinos at Colliders

Details Signatures of Axinos and Gravitinos at Colliders Signatures of Axinos and Gravitinos at Colliders

2005-01-31

arxiv.org/abs/hep-ph/0501287v2

Phys.Lett.B617:99-111,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 5 figures, revised version as published in Phys.Lett.B (comments on the experimental feasibility added)

Scientific paper

10.1016/j.physletb.2005.04.072

The axino and the gravitino are well-motivated candidates for the lightest supersymmetric particle (LSP) and also for cold dark matter in the Universe. Assuming that a charged slepton is the next-to-lightest supersymmetric particle (NLSP), we show how the NLSP decays can be used to probe the axino LSP scenario in hadronic axion models as well as the gravitino LSP scenario at the Large Hadron Collider and the International Linear Collider. We show how one can identify experimentally the scenario realized in nature. In the case of the axino LSP, the NLSP decays will allow one to estimate the value of the axino mass and the Peccei-Quinn scale.

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