Detection of SUSY Signals in Stau Neutralino Co‐annihilation Region at the LHC Academic Article uri icon


  • We study the prospects of detecting the signal in the stau neutralino (τ̃ 1 -χ̃ 10 ) coannihilation region at the LHC using tau (τ) leptons. The co-annihilation signal is characterized by the τ̃ 1 and χ̃ 10 mass difference (ΔM) to be 5-15 GeV to be consistent with the WMAP measurement of the cold dark matter relic density as well as all other experimental bounds within the minimal supergravity model. Focusing on τs from χ̃ 20 →; ττ̃ → ττχ̃ 10 decays in g̃ and q̃ production, we consider inclusive cross E sign T +jet+3τ production, with two τ's above a high E T threshold and a third τ above a lower threshold. Two observables, the number of opposite-signed τ pairs minus the number of like-signed τ pairs and the peak position of the di-tau invariant mass distribution, allow for the simultaneous determination of ΔM and M g̃ . For ΔM= 9 GeV and M g̃ = 850 GeV with 30 fb -1 of data, we can measure ΔM to 15% and MG ̃ to 6%. © 2007 American Institute of Physics.

author list (cited authors)

  • Arnowitt, R., Aurisano, A., Dutta, B., Kamon, T., Kolev, N., Simeon, P., Toback, D., & Wagner, P.

citation count

  • 1

publication date

  • April 2007


  • AIP  Publisher