Jet reconstruction and performance using particle flow with the ATLAS Detector

• Autores: Bossio Sola, Jonathan David; Piegaia, Ricardo Nestor; Croft, V.; Camacho Toro, R.; Dassoulas, J; Zhang, D.; Sinervo, P.; Nagel, M.; Martin, V.J.; Kolb, M.; Aad, G.; Alexa, C.; Bajic, M.; Bindi, M.; Connell, S.H.; Cuhadar Donszelmann, T.; Dedovich, D.V.; Dolezal, Z.; El Kacimi, M.; Fischer, J.; Freeborn, D.; Gabizon, O.; Galhardo, B.; Grillo, A.A.; Hanagaki, K.; Govender, N.; Gustavino, G.; Sawyer, L.; Zwalinski, L.; König, A. C.
• Año de publicación: 2017
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: JET; RECONSTRUCTION; PARTICLE FLOW
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

This paper describes the implementation and performance of a particle flow algorithm applied to 20.2 fb-1 of ATLAS data from 8 TeV proton?proton collisions in Run 1 of the LHC. The algorithm removes calorimeter energy deposits due to charged hadrons from consideration during jet reconstruction, instead using measurements of their momenta from the inner tracker. This improves the accuracy of the charged-hadron measurement, while retaining the calorimeter measurements of neutral-particle energies. The paper places emphasis on how this is achieved, while minimising double-counting of charged-hadron signals between the inner tracker and calorimeter. The performance of particle flow jets, formed from the ensemble of signals from the calorimeter and the inner tracker, is compared to that of jets reconstructed from calorimeter energy deposits alone, demonstrating improvements in resolution and pile-up stability.
Fil: Bossio Sola, Jonathan David. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Piegaia, Ricardo Nestor. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Croft, V.. Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, Holanda; Argentina
Fil: Camacho Toro, R.. Enrico Fermi Institute, University of Chicago, Chicago IL, Estados Unidos; Argentina
Fil: Dassoulas, J. Departmento of Física, Universidad de Alberta, Edmonton, Canada; Argentina
Fil: Zhang, D.. No especifica;
Fil: Sinervo, P.. Department of Physics, University of Toronto, Toronto ON, Canada; Argentina
Fil: Nagel, M.. Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Alemania; Argentina
Fil: Martin, V.J.. SUPA - School of Physics and Astronomy, University of Edinburgh, Edinburgh, Gran Bretaña; Argentina
Fil: Kolb, M.. Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg; Alemania; Argentina
Fil: Aad, G.. CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, Francia; Argentina
Fil: Alexa, C.. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Rumania; Argentina
Fil: Bajic, M.. Niels Bohr Institute, University of Copenhagen, Kobenhavn, Dinamarca; Argentina
Fil: Bindi, M.. II Physikalisches Institut, Georg-August-Universität, Göttingen, Alemania; Argentina
Fil: Connell, S.H.. Department of Physics, University of Johannesburg, Johannesburg, Sudáfrica; Argentina
Fil: Cuhadar Donszelmann, T.. Department of Physics and Astronomy, University of Sheffield, Sheffield, Gran Bretaña; Argentina
Fil: Dedovich, D.V.. Joint Institute for Nuclear Research, JINR Dubna, Dubna, Rusia; Argentina
Fil: Dolezal, Z.. Charles University, Faculty of Mathematics and Physics, Prague, República Checa; Argentina
Fil: El Kacimi, M.. Faculté des Sciences Semlalia, Université Cadi Ayyad, LPHEA-Marrakech, Marruecos; Argentina
Fil: Fischer, J.. Department of Particle Physics, The Weizmann Institute of Science, Rehovot, Israel; Argentina
Fil: Freeborn, D.. Department of Physics and Astronomy, University College London, Londres. Gran Bretaña; Argentina
Fil: Gabizon, O.. Department of Physics, Technion: Israel Institute of Technology, Haifa, Israel; Argentina
Fil: Galhardo, B.. No especifica;
Fil: Grillo, A.A.. Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz CA, Estados Unidos; Estados Unidos
Fil: Hanagaki, K.. KEK, High Energy Accelerator Research Organization, Tsukuba, Japon; Japón
Fil: Govender, N.. No especifica;
Fil: Gustavino, G.. No especifica;
Fil: Sawyer, L.. No especifica;
Fil: Zwalinski, L.. No especifica;
Fil: König, A. C.. Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen; Países Bajos