Lepton flavour violation in future linear colliders in the long-lived stau NLSP scenario

Abstract

We analyze the prospects of observing lepton flavour violation in future e-e- and e+e- linear colliders in scenarios where the gravitino is the lightest supersymmetric particle, and the stau is the next-to-lightest supersymmetric particle. The signals consist of multilepton final states with two heavily ionizing charged tracks produced by the long-lived staus. The Standard Model backgrounds are very small and the supersymmetric backgrounds can be kept well under control by the use of suitable kinematical cuts. We discuss in particular the potential of the projected International Linear Collider to discover lepton flavour violation in this class of scenarios, and we compare the estimated sensitivity with the constraints stemming from the non-observation of rare decays.

30 pages, 12 figures. Discussion extended to include the efficiency of identifying long-lived staus, references added. To appear in JHEP

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Cited by in corpus (12)

• Collider aspects of flavour physics at high Q
• Measuring Lepton Flavour Violation at LHC with Long-Lived Slepton in the Coannihilation Region
• Right-chiral sneutrinos and long-lived staus: event characteristics at the Large Hadron Collider
• Probing new physics with long-lived charged particles produced by atmospheric and astrophysical neutrinos
• Neutralino reconstruction in supersymmetry with long-lived staus
• Big-bang nucleosynthesis with a long-lived charged massive particle including ${}^4$He spallation processes
• Super-Natural MSSM
• A Clean Slepton Mixing Signal at the LHC
• New Physics Search at the CEPC: a General Perspective
• Chargino reconstruction in supersymmetry with long-lived staus
• Reconstruction of the left-chiral tau-sneutrino in supersymmetry with a right-sneutrino as the lightest supersymmetric particle
• Long-Lived Slepton in the Coannihilation Region and Measurement of Lepton Flavour Violation at LHC