We have considered a supersymmetric scenario in which the minimalsupersymmetric standard model is augmented with a right-chiral neutrinosuperfield for each generation. Such a scenario can have a lightestsupersymmetric particle (LSP) dominated by the right-chiral sneutrino state andthe lighter stau as the next-to-lightest supersymmetric particle (NLSP). Thiscan easily be motivated by assuming a high scale framework of supersymmetrybreaking like minimal supergravity (mSUGRA). Due to the extremely smallneutrino Yukawa coupling, the decay of the NLSP to the LSP is suppressed andconsequently the NLSP, here the lighter stau mass eigenstate, becomes stable atthe length scale of the detector. The collider signal in this case consists ofcharged tracks of massive stable particles in the muon chamber. Following up onour earlier studies on neutralino and chargino reconstruction in such ascenario, we have shown the kinematical information obtained from these chargedtracks allows us to reconstruct the left-chiral tau-sneutrino as well over asignificant region of the mSUGRA parameter space. Two methods forreconstruction are suggested and their relative merits are discussed.
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