Long-Lived Unstable Superparticles at the LHC

Ishiwata, Koji; Ito, Takumi; Moroi, Takeo

Long-Lived Unstable Superparticles at the LHC

Authors

Ishiwata, Koji

Ito, Takumi

Moroi, Takeo

Description

In various models of supersymmetry (SUSY), the lightest superparticle in the minimal SUSY standard model sector, which we call MSSM-LSP, becomes unstable. Then, we may observe the decay of the MSSM-LSP in the detector at the LHC experiment. We show that the discovery of such a decay process (and the determination of the lifetime of the MSSM-LSP) may be possible at the LHC even if the decay length of the MSSM-LSP is much longer than the size of the detector; sizable number of the MSSM-LSPs decay inside the detector if the lifetime is shorter than 0.01-1 millisec. We also discuss the implications of the study of the MSSM-LSP decay for several well-motivated SUSY models.
13 pages, 4 figures