Reconstruction and identification of $τ$ lepton decays to hadrons and ν$_τ$ at CMS

CMS Collaboration; Canelli, F; Chiochia, V; Kilminster, B; Robmann, P; et al (2016). Reconstruction and identification of $τ$ lepton decays to hadrons and ν$_τ$ at CMS. Journal of Instrumentation, 11(1):P01019.

Abstract

This paper describes the algorithms used by the CMS experiment to reconstruct and identify $τ$ → hadrons + ν$_τ$ decays during Run 1 of the LHC. The performance of the algorithms is studied in proton-proton collisions recorded at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb$^{−1}$. The algorithms achieve an identification efficiency of 50–60%, with misidentification rates for quark and gluon jets, electrons, and muons between per mille and per cent levels.

Abstract

This paper describes the algorithms used by the CMS experiment to reconstruct and identify $τ$ → hadrons + ν$_τ$ decays during Run 1 of the LHC. The performance of the algorithms is studied in proton-proton collisions recorded at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb$^{−1}$. The algorithms achieve an identification efficiency of 50–60%, with misidentification rates for quark and gluon jets, electrons, and muons between per mille and per cent levels.

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