The algorithm developed by the CMS Collaboration to reconstruct and identify τ leptons produced in proton-proton collisions at s=7 and 8 TeV, via their decays to hadrons and a neutrino, has been significantly improved. The changes include a revised reconstruction of π0 candidates, and improvements in multivariate discriminants to separate τ leptons from jets and electrons. The algorithm is extended to reconstruct τ leptons in highly Lorentz-boosted pair production, and in the high-level trigger. The performance of the algorithm is studied using proton-proton collisions recorded during 2016 at s=13 TeV, corresponding to an integrated luminosity of 35.9 fb-1. The performance is evaluated in terms of the efficiency for a genuine τ lepton to pass the identification criteria and of the probabilities for jets, electrons, and muons to be misidentified as τ leptons. The results are found to be very close to those expected from Monte Carlo simulation.

Performance of reconstruction and identification of τ leptons decaying to hadrons and vτ in pp collisions at s=13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Dragicevic, M., Ero, J., Valle, A.E.D., Flechl, M., Fruhwirth, R., Ghete, V.M., Hrubec, J., Jeitler, M., Krammer, N., Kratschmer, I., Liko, D., Madlener, T., Mikulec, I., et al.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 13:10(2018), pp. P10005-P10005. [10.1088/1748-0221/13/10/P10005]

Performance of reconstruction and identification of τ leptons decaying to hadrons and vτ in pp collisions at s=13 TeV

Cipriani M.;Longo E.;Organtini G.;Paramatti R.;Rahatlou S.;Santanastasio F.;
2018

Abstract

The algorithm developed by the CMS Collaboration to reconstruct and identify τ leptons produced in proton-proton collisions at s=7 and 8 TeV, via their decays to hadrons and a neutrino, has been significantly improved. The changes include a revised reconstruction of π0 candidates, and improvements in multivariate discriminants to separate τ leptons from jets and electrons. The algorithm is extended to reconstruct τ leptons in highly Lorentz-boosted pair production, and in the high-level trigger. The performance of the algorithm is studied using proton-proton collisions recorded during 2016 at s=13 TeV, corresponding to an integrated luminosity of 35.9 fb-1. The performance is evaluated in terms of the efficiency for a genuine τ lepton to pass the identification criteria and of the probabilities for jets, electrons, and muons to be misidentified as τ leptons. The results are found to be very close to those expected from Monte Carlo simulation.
2018
Large detector-systems performance; Particle identification methods; Performance of High Energy Physics Detectors
01 Pubblicazione su rivista::01a Articolo in rivista
Performance of reconstruction and identification of τ leptons decaying to hadrons and vτ in pp collisions at s=13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Dragicevic, M., Ero, J., Valle, A.E.D., Flechl, M., Fruhwirth, R., Ghete, V.M., Hrubec, J., Jeitler, M., Krammer, N., Kratschmer, I., Liko, D., Madlener, T., Mikulec, I., et al.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 13:10(2018), pp. P10005-P10005. [10.1088/1748-0221/13/10/P10005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1354464
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