Supergravity at Colliders

Details Supergravity at Colliders Supergravity at Colliders

2004-02-18

arxiv.org/abs/hep-ph/0402179v2

Phys.Lett.B588:90-98,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 11 figures; v2: 3 references added, to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2004.03.016

We consider supersymmetric theories where the gravitino is the lightest superparticle (LSP). Assuming that the long-lived next-to-lightest superparticle (NSP) is a charged slepton, we investigate two complementary ways to prove the existence of supergravity in nature. The first is based on the NSP lifetime which in supergravity depends only on the Planck scale and the NSP and gravitino masses. With the gravitino mass inferred from kinematics, the measurement of the NSP lifetime will test an unequivocal prediction of supergravity. The second way makes use of the 3-body NSP decay. The angular and energy distributions and the polarizations of the final state photon and lepton carry the information on the spin of the gravitino and on its couplings to matter and radiation.

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