SoftKiller, a particle-level pileup removal method

The European Physical Journal C

Gavin P. Salam¹  Gregory Soyez²  Matteo Cacciari³ 

[1] CERN, PH-TH, 1211, Geneva 23, Switzerland;IPhT, CEA Saclay, CNRS URA 2306, 91191, Gif-sur-Yvette Cedex, France;Université Paris Diderot, Paris, France;Sorbonne Universités, UPMC Univ Paris 06, UMR 7589, LPTHE, 75005, Paris, France;CNRS, UMR 7589, LPTHE, 75005, Paris, France;

关键词: Large Hadron Collider;    Transverse Momentum;    Grid Spacing;    Median Method;    Pileup Event;   

DOI  :  10.1140/epjc/s10052-015-3267-2

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY