https://doi.org/10.1140/epjc/s10052-015-3267-2
Regular Article - Theoretical Physics
SoftKiller, a particle-level pileup removal method
1
Université Paris Diderot, Paris, France
2
Sorbonne Universités, UPMC Univ Paris 06, UMR 7589, LPTHE, 75005, Paris, France
3
CNRS, UMR 7589, LPTHE, 75005, Paris, France
4
CERN, PH-TH, 1211, Geneva 23, Switzerland
5
IPhT, CEA Saclay, CNRS URA 2306, 91191, Gif-sur-Yvette Cedex, France
* e-mail: cacciari@lpthe.jussieu.fr
Received:
21
July
2014
Accepted:
11
January
2015
Published online:
6
February
2015
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.
© SIF and Springer-Verlag Berlin Heidelberg, 2015
