Measuring τ -polarisation in χ̃2 decays at the LHC
نویسندگان
چکیده
We show how the sum of the two average tau polarisations in the decay chain χ̃2 → τ̃1τ → ττ χ̃1 in minimal supersymmetry with conserved R-parity can be measured at the LHC. This is accomplished by exploiting the polarisation dependence of the visible di-tau mass spectrum. Such a measurement provides information on the couplings of the involved SUSY particles and allows a more precise determination of the di-tau mass endpoint. If different tau decay modes can be distinguished, the polarisation and endpoint measurement can be improved even further.
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