title: SoftKiller, a particle-level pileup removal method.
abstract: Existing widely used pileup removal approaches correct the momenta of individual jets. In this article we introduce an event-level, particle-based pileup correction procedure, SoftKiller. It removes the softest particles in an event, up to a transverse momentum threshold that is determined dynamically on an event-by-event basis. In simulations, this simple procedure appears to be reasonably robust and brings superior jet resolution performance compared to existing jet-based approaches. It is also nearly two orders of magnitude faster than methods based on jet areas.
authors.affiliation: Université Paris Diderot, Paris, France ; Sorbonne Universités, UPMC Univ Paris 06, UMR 7589, LPTHE, 75005 Paris, France ; CNRS, UMR 7589, LPTHE, 75005 Paris, France.
authors.forename: Matteo
authors.initials: M
authors.lastname: Cacciari
authors.affiliation: CERN, PH-TH, 1211 Geneva 23, Switzerland.
authors.forename: Gavin P
authors.initials: GP
authors.lastname: Salam
authors.affiliation: IPhT, CEA Saclay, CNRS URA 2306, 91191 Gif-sur-Yvette Cedex, France.
authors.forename: Gregory
authors.initials: G
authors.lastname: Soyez
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