Performance of pile-up mitigation techniques for jets in $$pp$$ p p collisions at $$\sqrt{s}=8$$ s = 8 TeV using the ATLAS detector
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 [Formula: see text] data sample collected at a centre-of-mass energy of [Formula: see text]. 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.
Funding
- National Science Foundation
- U.S. Department of Energy
- Alexander von Humboldt-Stiftung
- Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)
- Ontario Innovation Trust
- Canarie
- Türkiye Atom Enerjisi Kurumu
- TRIUMF
- CERN
- Compute Canada
- Leverhulme Trust
- Royal Society
- European Commission
- Department of Science and Technology, Ministry of Science and Technology, India
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- Ministry of Education, Culture, Sports, Science and Technology
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Danmarks Grundforskningsfond
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- National Natural Science Foundation of China
- Bundesministerium für Bildung und Forschung
- Austrian Science Fund
- Fonds Québécois de la Recherche sur la Nature et les Technologies
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Bundesministerium für Wissenschaft, Forschung und Wirtschaft
- General Secretariat for Research and Technology
- Lundbeckfonden
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Joint Institute for Nuclear Research
- Israel Science Foundation
- Max-Planck-Gesellschaft
- Javna Agencija za Raziskovalno Dejavnost RS
- Ministerstwo Edukacji i Nauki
- Centre National de la Recherche Scientifique
- Georgian National Science Foundation
- Centre National pour la Recherche Scientifique et Technique
- Services Fédéraux des Affaires Scientifiques, Techniques et Culturelles
- Fondation Partager le Savoir
- H. Lundbeck A/S
- National Research Center "Kurchatov Institute"
- Natural Sciences and Engineering Research Council of Canada
- Science and Technology Facilities Council
- Japan Society for the Promotion of Science
- Fundação para a Ciência e a Tecnologia
- Comisión Nacional de Investigación Científica y Tecnológica
- Agencia Nacional de Promoción Científica y Tecnológica
- Israeli Centers for Research Excellence
- British Columbia Knowledge Development Fund
- Institut National de Physique Nucléaire et de Physique des Particules
- European Social Fund
- H2020 Marie Skłodowska-Curie Actions
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