  If signals suggesting supersymmetry (SUSY) are discovered at the LHC then it
will be vital to measure the spin of the new particles to demonstrate that they
are indeed the predicted super-partners. A method is discussed by which the
spins of some of the SUSY particles can be investigated. Angular distributions
in sparticle decays lead to charge asymmetry in lepton-jet invariant mass
distributions. The size of the asymmetry is proportional to the primary
production asymmetry between squarks and anti-squarks. Monte Carlo simulations
are performed for a particular mSUGRA model point at the LHC. The resultant
asymmetry distributions are consistent with a spin-0 slepton and a spin-half
neutralino-two, but are not consistent with the pure phase-space decays one
would obtain from both sparticles being scalars.
