Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 TeV using the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

The large rate of multiple simultaneous proton–proton interactions, or pile-up, generated by the Large Hadron Collider in Run 1 required the development of many new techniques to mitigate the adverse effects of these conditions. This paper describes the methods employed in the ATLAS experiment to correct for the impact of pile-up on jet energy and jet shapes, and for the presence of spurious additional jets, with a primary focus on the large 20.3 fb- 1data sample collected at a centre-of-mass energy of s=8TeV. The energy correction techniques that incorporate sophisticated estimates of the average pile-up energy density and tracking information are presented. Jet-to-vertex association techniques are discussed and projections of performance for the future are considered. Lastly, the extension of these techniques to mitigate the effect of pile-up on jet shapes using subtraction and grooming procedures is presented.

Original languageEnglish
Article number581
JournalEuropean Physical Journal C
Volume76
Issue number11
DOIs
Publication statusPublished - Nov 1 2016

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piles
Piles
Detectors
collisions
detectors
Colliding beam accelerators
subtraction
center of mass
energy
apexes
flux density
projection
estimates
Experiments
interactions

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 TeV using the ATLAS detector. / ATLAS Collaboration.

In: European Physical Journal C, Vol. 76, No. 11, 581, 01.11.2016.

Research output: Contribution to journalArticle

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