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

Barton, Adam Edward and Beattie, Michael and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy (2016) Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 TeV using the ATLAS detector. European Physical Journal C: Particles and Fields, 76 (11). ISSN 1434-6044

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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−1 data sample collected at a centre-of-mass energy of √s=8 TeV. 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.

Item Type: Journal Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 83929
Deposited By: ep_importer_pure
Deposited On: 11 Jan 2017 10:34
Refereed?: Yes
Published?: Published
Last Modified: 03 Dec 2019 04:21
URI: https://eprints.lancs.ac.uk/id/eprint/83929

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