Impact of bosonic decays on the search for stau2 and tau-sneutrino
A. Bartl, H. Eberl, K. Hidaka, S. Kraml, T. Kon, W. Majerotto, W. Porod, Y. Yamada
Abstract
We perform a detailed study of the decays of the heavier tau slepton (stau2) and tau-sneutrino (snutau) in the Minimal Supersymmetric Standard Model (MSSM). We show that the decays into Higgs or gauge bosons, i.e. stau2 -> stau1 + (h0, H0, A0 or Z0), stau2 -> snutau + (H- or W-), and snutau -> stau1 + (H+ or W+), can be very important due to the sizable tau Yukawa coupling and large mixing parameters of stau. Compared to the decays into fermions, such as stau2 -> tau + neutralinoi and stau2 -> nutau + charginoj-, these bosonic decay modes can have significantly different decay distributions. This could have an important influence on the search for stau2 and snutau and the determination of the MSSM parameters at future colliders.
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