Khachatryan, V.Sirunyan, A. M.Tumasyan, A.Adam, W.Asilar, E.Bergauer, T.The CMS Collaboration2025-03-072025-03-0720161748-0221https://doi.org/10.1088/1748-0221/11/01/P01019https://hdl.handle.net/20.500.12507/2980This paper describes the algorithms used by the CMS experiment to reconstruct and identify tau -> hadrons + nu(tau) 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.eninfo:eu-repo/semantics/openAccessParticle identification methodsLarge detector systems for particle and astroparticle physicsArticle11WOS:0003714698001072-s2.0-8495824404910.1088/1748-0221/11/01/P01019Q2Q3