The SISCone and anti-kt jet algorithms

Abstract

We illustrate how the midpoint and iterative cone (with progressive removal) algorithms fail to satisfy the fundamental requirements of infrared and collinear safety, causing divergences in the perturbative expansion. We introduce SISCone and the anti-kt algorithms as respective replacements that do not have those failures without any cost at the experimental level.

Comments: 4 pages, presented at the 16th workshop on Deep Inelastic Scattering, 7-11 April 2008, UCL, London, UK