New leptons with exotic decays: collider limits and dark matter complementarity Guedes, Guilherme Santiago Pérez, José Beyond Standard Model Cosmology of Theories beyond the SM Technicolor and Composite Models We are grateful to N. Castro, M. Chala, M. Ramos and T. Vale for useful comments. This work has been supported in part by the Ministry of Science, Innovation and Universities (PID2019-106087GB-C22) and by the Junta de Andalucia grants FQM 101, SOMM17/6104/UGR, A-FQM-211-UGR18 and P18-FR-4314 (FEDER). GG acknowledges support by LIP (FCT, COMPETE2020-Portugal2020, FEDER, POCI-01-0145-FEDER007334) as well as by FCT under project CERN/FIS-PAR/0024/2019 and under the grant SFRH/BD/144244/2019. We describe current and future hadron collider limits on new vector-like leptons with exotic decays. We consider the possibility that, besides standard decays, the new leptons can also decay into a Standard Model charged lepton and a stable particle like a dark photon. To increase their applicability, our results are given in terms of arbitrary branching ratios in the different decay channels. In the case that the dark photon is stable at cosmological scales we discuss the interplay between the dark photon and the vector-like lepton in generating the observed dark matter relic abundance and the complementarity of collider searches and dark matter phenomenology. 2022-02-08T08:37:56Z 2022-02-08T08:37:56Z 2022-01-20 journal article Guedes, G., Santiago, J. New leptons with exotic decays: collider limits and dark matter complementarity. J. High Energ. Phys. 2022, 111 (2022). [https://doi.org/10.1007/JHEP01(2022)111] http://hdl.handle.net/10481/72711 10.1007/JHEP01(2022)111 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Springer