  Simulating pp collisions at LHC energies in the framework of the SUGRA model
and the detection of the produced leptons and jets by ATLAS we demonstrate that
a clean signature of SUSY can be obtained over a large domain of the parameter
space in the case of L-violating R parity breaking ($\lambda$ couplings). The
obtained signal allows the reconstruction of the SUSY particles and thereby the
precise determination of the model parameters $m_0, m_{1/2}, tan\beta$ and sign
$\mu$.

High Energy Physics - Phenomenology