
Open access
Date
2020-09Type
- Journal Article
Citations
Cited 42 times in
Web of Science
Cited 52 times in
Scopus
ETH Bibliography
yes
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Abstract
With increasing instantaneous luminosity at the LHC come additional reconstruction challenges. At high luminosity, many collisions occur simultaneously within one proton-proton bunch crossing. The isolation of an interesting collision from the additional "pileup" collisions is needed for effective physics performance. In the CMS Collaboration, several techniques capable of mitigating the impact of these pileup collisions have been developed. Such methods include charged-hadron subtraction, pileup jet identification, isospin-based neutral particle "delta beta" correction, and, most recently, pileup per particle identification. This paper surveys the performance of these techniques for jet and missing transverse momentum reconstruction, as well as muon isolation. The analysis makes use of data corresponding to 35.9 fb(-1) collected with the CMS experiment in 2016 at a center-of-mass energy of 13 TeV. The performance of each algorithm is discussed for up to 70 simultaneous collisions per bunch crossing. Significant improvements are found in the identification of pileup jets, the jet energy, mass, and angular resolution, missing transverse momentum resolution, and muon isolation when using pileup per particle identification. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000448476Publication status
publishedExternal links
Journal / series
Journal of InstrumentationVolume
Pages / Article No.
Publisher
IOP Publishing LtdSubject
Calorimeter methods; Calorimeters; Large detector-systems performanceOrganisational unit
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
09720 - de Cosa, Annapaola / de Cosa, Annapaola
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Show all metadata
Citations
Cited 42 times in
Web of Science
Cited 52 times in
Scopus
ETH Bibliography
yes
Altmetrics