Microsoft Word - opt jet def –

A criterion for finding a configuration of jets for a given multiparticle event: • is derived uniquely from minimum formal input; • guarantees minimal distortion of physical information in the transition from particles to jets; • is optimally stable with respect to data errors; • does not restrict geometric shape of jets; • allows jets to share particles; • amounts to finding a matrix via minimization of a simple function; • does not otherwise restrict algorithmic implementations; • admits the conventional schemes as simple, perhaps imperfect (sic), heuristics.