A generalised-$k_t$ jet algorithm for Deep Inelastic Scattering

Abstract

We introduce an inclusive generalised-$k_t$ jet algorithm for Deep Inelastic Scattering, defined in the Breit frame and implemented in fjcontrib. The family of algorithms is governed by the usual parameter $p$, which controls the transverse-momentum dependence of the algorithm, as well as by a jet radius parameter $R$. The angular-ordered ($p=0$) version of the algorithm was already presented by some of us, and can be used to formulate observables with simple all-order structures. In this article we investigate phenomenological applications of the algorithms related to the identification of the jet associated with the struck quark, and assess their sensitivity to non-perturbative effects, such as hadronisation. We also perform comparisons with the recent Centauro algorithm.

22 pages. Code available through fjcontrib at https://repo.hepforge.org/source/fastjetsvn/browse/contrib/contribs/DISGenkt