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Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 TeV using the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 28442016 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 76, no 11Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Springer, 2016. Vol. 76, no 11
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Physical Sciences
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URN: urn:nbn:se:kth:diva-202325DOI: 10.1140/epjc/s10052-016-4395-zISI: 000399931300001Scopus ID: 2-s2.0-84993983948OAI: oai:DiVA.org:kth-202325DiVA, id: diva2:1075813
Note

QC 20170221

Available from: 2017-02-21 Created: 2017-02-21 Last updated: 2017-05-23Bibliographically approved

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Lund-Jensen, BengtSidebo, P. EdvinStrandberg, Jonas

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