Supersymmetric particle mass measurement with the boost-corrected contransverse mass
A modification to the contransverse mass (MCT ) technique for measuring the masses of pair-produced semi-invisibly decaying
heavy particles is proposed in which MCT is corrected for non-zero boosts of the centre-of-momentum (CoM) frame of the heavy
states in the laboratory transverse plane. Lack of knowledge of the mass of the CoM frame prevents exact correction for this
boost, however it is shown that a conservative correction can nevertheless be derived which always generates an MCT value
which is less than or equal to the true value of MCT in the CoM frame. The new technique is demonstrated with case studies
of mass measurement with fully leptonic events and with SUSY events possessing a similar final state.