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https://hdl.handle.net/10316/106896
Título: | ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s=13 TeV | Autor: | Fiolhais, M. C. N. Veloso, F. Wolters, H. ATLAS Collaboration |
Data: | 2019 | Editora: | Springer Nature | Título da revista, periódico, livro ou evento: | European Physical Journal C | Volume: | 79 | Número: | 11 | Resumo: | The algorithms used by the ATLAS Collaboration during Run 2 of the Large Hadron Collider to identify jets containing b-hadrons are presented. The performance of the algorithms is evaluated in the simulation and the efficiency with which these algorithms identify jets containing b-hadrons is measured in collision data. The measurement uses a likelihood-based method in a sample highly enriched in tt¯ events. The topology of the t→ Wb decays is exploited to simultaneously measure both the jet flavour composition of the sample and the efficiency in a transverse momentum range from 20 to 600 GeV. The efficiency measurement is subsequently compared with that predicted by the simulation. The data used in this measurement, corresponding to a total integrated luminosity of 80.5 fb - 1, were collected in proton–proton collisions during the years 2015–2017 at a centre-of-mass energy s= 13 TeV. By simultaneously extracting both the efficiency and jet flavour composition, this measurement significantly improves the precision compared to previous results, with uncertainties ranging from 1 to 8% depending on the jet transverse momentum. | URI: | https://hdl.handle.net/10316/106896 | DOI: | 10.1140/epjc/s10052-019-7450-8 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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ATLAS-bjet-identification-performance-and-efficiency-measurement-with-tt-events-in-pp-collisions-at-s13-TeVEuropean-Physical-Journal-C.pdf | 2.24 MB | Adobe PDF | Ver/Abrir |
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