Abstract. If new particles are discovered at the LHC, it will be important to determine their spins in as model-independent a way as possible. We consider the case, commonly encountered in models of physics beyond the Standard Model, of a new scalar or fermion D decaying sequentially into other new particles C,B,A via the decay chain D→Cq, C→Bl^near, B→Al^far, l^near and l^far being opposite-sign same-flavour charged leptons and A being invisible. We compute the observable 2- and 3-particle invariant mass distributions for all possible spin assignments of the new particles, and discuss their distinguishability using a quantitative measure known as the Kullback-Leibler distance.

Key words: Large Extra Dimensions; Supersymmetry Phenomenology; Beyond Standard Model; Hadronic Colliders

An erratum page was received on 12 September 2008 and added to the end of the published paper on 1 October 2008.

E-print number: hep-ph/0605286
Cited: by
Refers: to

Received 23 June 2006, accepted for publication 24 July 2006
Published 23 August 2006