Journal
PHYSICS LETTERS B
Volume 617, Issue 1-2, Pages 99-111Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2005.04.072
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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. (c) 2005 Elsevier B.V. All rights reserved.
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