Chekhovsky, V.Hayrapetyan, A.Makarenko, V.Tumasyan, A.Adam, W.Andrejkovic, J. W.Lee, J.2025-12-152025-12-1520251029-847910.1007/JHEP08(2025)1562-s2.0-105021492139https://doi.org/10.1007/JHEP08(2025)156Castilla-Valdez, Heriberto/0009-0005-9590-9958; Meuser, Danilo/0000-0002-2722-7526; Goldstein, Joel/0000-0003-1591-6014; Niedziela, Jeremi/0000-0002-9514-0799; Cetorelli, Flavia/0000-0002-3061-1553; Diotalevi, Tommaso/0000-0003-0780-8785; Ligabue, Franco/0000-0002-1549-7107; Gadallah, Mahmoud Moussa Abdelkhalek/0000-0002-8305-6661; Kramer, Tobias Robert Jakob/0000-0002-7004-0214; Robertshaw, Liam/0009-0006-5304-2492; Pauls, Alexander/0000-0002-8117-5376; Sharma, Ram Krishna/0000-0003-1181-1426; Garutti, Erika/0000-0003-0634-5539; Pesaresi, Mark/0000-0002-9759-1083; Mastrapasqua, Paola/0000-0002-2043-2367; Waltenberger, Wolfgang/0000-0002-6215-7228; Sekhar, Sanjana/0000-0002-8307-7518; Lorkowski, Florian/0000-0003-2677-3805; Brooke, James/0000-0003-2529-0684; Piccinelli, Anea/0000-0003-0386-0527; Dharmaratna, Welathantri/0000-0002-6366-837X; Zorbakir, Ibrahim Soner/0000-0002-5962-2221; 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Mantilla, Cristina/0000-0002-0177-5903; Noll, Dennis Daniel Nick/0000-0002-0176-2360; Golf, Frank/0000-0003-3567-9351; Ruiz, Jose/0000-0002-3306-0363; Gomez-Ceballos, Guillelmo/0000-0003-1683-9460; Cavallari, Francesca/0000-0002-1061-3877; Kirpichnikov, Dmitry/0000-0002-7177-077X; Agicevic, Marko/0000-0003-1967-6783; Yagil, Avi/0000-0002-6108-4004; Leonardo, Nuno/0000-0002-9746-4594; Blumenfeld, Barry/0000-0003-1150-1735; Jabeen, Shabnam/0000-0002-0155-7383; Menezes De Oliveira, Thales/0009-0009-4729-8354; Lee, Jason/0000-0002-2153-1519; Sarkar, Tanmay/0000-0003-0582-4167; Duarte, Javier Mauricio/0000-0002-5076-7096; Konstantinou, Sotiroulla/0000-0003-0408-7636; Wittich, Peter/0000-0002-7401-2181; D'Amante, Valeria/0000-0002-7342-2592; Chernyavskaya, Nadezda/0000-0002-2264-2229; Moureaux, Louis/0000-0002-2310-9266; Röwert, Nicolas/0000-0002-4745-5470; Hinzmann, Aneas/0000-0002-2633-4696; Melo Da Costa, Eliza/0000-0002-5016-6434; Migliore, Ernesto/0000-0002-2271-5192; Chou, Pin-Chun/0000-0002-5842-8566; Rieger, Marcel/0000-0003-0797-2606; Cavallari, Francesca/0000-0002-1061-3877; Lu, Meng/0000-0002-6999-3931; Christoforou, Konstantinos/0000-0003-2205-1100; Sharma, Ashish/0000-0002-0688-923X; Kim, Suho/0000-0003-2381-5117; Torres Da Silva De Araujo, Felipe/0000-0002-4785-3057; Lee, Jason/0000-0002-2153-1519; Lawhorn, Jay/0000-0002-8597-9259; Mudholkar, Tanmay/0000-0002-9352-8140; Grab, Christophorus/0000-0002-6182-3380; Krintiras, Georgios Konstantinos/0000-0002-0380-7577; Salvatico, Riccardo/0000-0002-2751-0567; Seidel, Markus/0000-0003-3550-6151; Dubinin, Mikhail/0000-0002-7766-7175; Qin, Xuelong/0009-0007-5089-3694; Petrucciani, Giovanni/0000-0003-0889-4726; Dallavalle, Gaetano Marco/0000-0002-8614-0420; Horzela, Maximilian/0000-0002-3190-7962; Ruales, Anderson/0000-0003-0826-0803; Rinkevicius, Aurelijus/0000-0002-7510-255X; Petković, Ano/0009-0005-9565-6399; Torres Da Silva De Araujo, Felipe/0000-0002-4785-3057; Alcaraz Maestre, Juan/0000-0003-0914-7474; Ajmal, Sehar/0000-0002-2726-2858; Saha, Nihar Ranjan/0000-0002-7954-7898; Saha, Gourab/0000-0002-6125-1941; Fehérkuti, Anna/0000-0002-5043-2958; Bodek, Arie/0000-0003-0409-0341; Tok, Ufuk Guney/0000-0002-3039-021X; Tok, Ufuk Guney/0000-0002-3039-021X; Tok, Ufuk Guney/0000-0002-3039-021X; Lee, Jason/0000-0002-2153-1519; Gershtein, Yuri/0000-0002-4871-5449; De Souza Lemos, Dener/0000-0003-1982-8978; D'Enterria, David/0000-0002-5754-4303; Heikkilä, Jaana/0000-0002-0538-1469; Mondal, Spandan/0000-0003-0153-7590; Meridiani, Paolo/0000-0002-8480-2259; Vischia, Pietro/0000-0002-7088-8557; Tytgat, Michael/0000-0002-3990-2074; Lange, Clemens/0000-0002-3632-3157; Selvaggi, Michele/0000-0002-5144-9655; Kanuganti, Ankush Reddy/0000-0002-0789-1200; Mendizabal, Mikel/0000-0002-6506-5177; Bury, Florian/0000-0002-3077-2090; Sehrawat, Ashish/0000-0002-6816-7814; Yagil, Avi/0000-0002-6108-4004; Stäger, Fabian/0009-0003-0724-7727; Hinzmann, Aneas/0000-0002-2633-4696; Osite, Dace/0000-0002-2912-319X; Kole, Gouranga/0000-0002-3285-1497; Sahasransu, Abanti Ranadhir/0000-0003-1505-1743; Manzoni, Riccardo Anea/0000-0002-7584-5038; Tiras, Emrah/0000-0002-5628-7464; Naskar, Kousik/0000-0003-0638-4378; Figueiredo, Diego/0000-0003-2514-6930; Pizzati, Giorgio/0000-0003-1692-6206; Grummer, Aidan/0000-0003-2752-1183; Han, Yixiao/0000-0002-3510-6505; Fiorina, Davide/0000-0002-7104-257X; Assiouras, Panagiotis/0000-0002-5152-9006; Faccioli, Pietro/0000-0003-1849-6692; Novaes, Sergio/0000-0003-0471-8549; Aarrestad, Thea/0000-0002-7671-243X; Mousa, Jehad/0000-0002-2978-2718; Ptochos, Fotios/0000-0002-3432-3452; Watson, Ian James/0000-0003-2141-3413; Sharma, Ashish/0000-0002-0688-923X; Dominguez, Aaron/0000-0002-7420-5493; Dogra, Sunil Manohar/0000-0002-0812-0758; Ruabhatla, Sahithi/0000-0002-7366-4225; Zucchetta, Alberto/0000-0003-0380-1172; D'Amante, Valeria/0000-0002-7342-2592; Zorbakir, Ibrahim Soner/0000-0002-5962-2221; Luongo, Fabio/0000-0003-2743-4119; Arneodo, Michele/0000-0002-7790-7132; Frankenthal, Ane/0000-0002-2583-5982; Ecklund, Karl/0000-0002-6976-4637; Zucchetta, Alberto/0000-0003-0380-1172; Lu, Meng/0000-0002-6999-3931; Dozen, Candan/0000-0002-4301-634X; Chou, Pin-Chun/0000-0002-5842-8566; Mondal, Spandan/0000-0003-0153-7590; Dozen, Candan/0000-0002-4301-634X; Nanda, Shirsendu/0000-0003-0550-4083; Pásztor, Gabriella/0000-0003-0707-9762; Sharma, Vivek/0000-0003-1736-8795; Klanner, Robert/0000-0002-7004-9227; Novaes, Sergio/0000-0003-0471-8549; Alexakhin, Vadim/0000-0002-4886-1569; Fischer, Yannick/0000-0002-3184-1457; Gomez Espinosa, Tirso Alejano/0000-0002-9443-7769; Dozen, Candan/0000-0002-4301-634X; Erice Cid, Carlos Francisco/0000-0002-6469-3200; Simone, Federica Maria/0000-0002-1924-983X; Mantilla, Cristina/0000-0002-0177-5903; Lasaosa García, Clara/0000-0003-2726-7111; Watson, Ian James/0000-0003-2141-3413; Alves, Gilvan/0000-0002-8369-1446; Pásztor, Gabriella/0000-0003-0707-9762; Vannerom, David/0000-0002-2747-5095; Lu, Meng/0000-0002-6999-3931; Dozen, Candan/0000-0002-4301-634X; Duarte, Javier Mauricio/0000-0002-5076-7096; Fontanesi, Elisa/0000-0002-0662-5904; Klyukhin, Vyacheslav/0000-0002-8577-6531; Mehta, Ankita/0000-0002-0433-4484; Lee, Lawrence/0000-0002-5590-335X; Vai, Ilaria/0000-0003-0037-5032; Reimers, Arne Christoph/0000-0002-9438-2059; Grohsjean, Alexander/0000-0003-0748-8494; Chahal, Gurpreet Singh/0000-0003-0320-4407; Tapper, Alexander/0000-0003-4543-864X; Lange, Clemens/0000-0002-3632-3157; Kunnawalkam Elayavalli, Raghav/0000-0002-9202-1516; Knight, Charlotte Rose/0009-0008-1167-4816; Ehatäht, Karl/0000-0002-2387-4777; Dharmaratna, Welathantri/0000-0002-6366-837X; Ha, Seungkyu/0000-0003-2538-1551; Guzzi, Luca/0000-0002-3086-8260; Saha, Gourab/0000-0002-6125-1941; Simone, Federica Maria/0000-0002-1924-983X; Novaes, Sergio/0000-0003-0471-8549; Hatakeyama, Kenichi/0000-0002-6012-2451; Pfeffer, Emanuel/0009-0009-1748-974X; Poncet, Océane/0000-0002-5346-2968; Martinez Ruiz Del Arbol, Pablo/0000-0002-7737-5121; Novaes, Sergio/0000-0003-0471-8549; Leon Holgado, Jaime/0000-0002-4156-6460; Rieger, Marcel/0000-0003-0797-2606;A first search is presented for vector-like leptons (VLLs) exclusively decaying into a light long-lived pseudoscalar boson and a standard model tau lepton. The pseudoscalar boson is assumed to have a mass below the tau(+)tau(-) threshold, so that it decays exclusively into two photons. It is identified using the CMS muon system. The analysis is carried out using a data set of proton-proton collisions at a center-of-mass energy of 13 TeV collected by the CMS experiment in 2016-2018, corresponding to an integrated luminosity of 138 fb(-1). Selected events contain at least one pseudoscalar boson decaying electromagnetically in the muon system and at least one hadronically decaying tau lepton. No significant excess of data events is observed compared to the background expectation. Upper limits are set at 95% confidence level on the vector-like lepton production cross section as a function of the VLL mass and the pseudoscalar boson mean proper decay length. The observed and expected exclusion ranges of the VLL mass extend up to 700 and 670 GeV, respectively, depending on the pseudoscalar boson lifetime.eninfo:eu-repo/semantics/openAccessBeyond Standard ModelHadron-Hadron ScatteringLepton ProductionTau PhysicsArticle