The use of clustering techniques for the classification of high energy physics data

We present an attempt to separate between two kinds of high energy events: Higgs boson events ( e + e - → ZH → 4 jets ) and other physics processes in the 4-jet channel ( e + e - → Z / γ , W + W - , ZZ → 4 jets ) , using several clustering techniques. Hierarchical and K-means methods as well as a Peano space filling curve are investigated. Events were produced at post-LEP2 energies, using the Lund Monte Carlo generator and the ALEPH package.