Recent developments in jet clustering

Matteo Cacciari (LPTHE, Paris)
DESY SR4a/b (!), 17:00h

Jets act as brokers between experimental measurements and perturbative theoretical predictions in QCD. For them to perform such task effectively, the clustering algorithms should meet certain requirements, laid down in the Snowmass accord in 1990 but then never fully implemented. We will describe how this impasse was recently overcome by improving existing jet algorithms and introducing new ones. We will further show how the techniques introduced in doing so have led to qualitatively new ways of using jet clustering, paving the way for jet areas, background subtraction, `third generation' algorithms and the novel concept of `jetography'.

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Transparencies (.pdf)