doi:10.1007/JHEP10(2021)075engÁlvarez Melcón A.Arguedas Cuendis S.Baier J.Barth K.Bräuninger H.Calatroni S.Cantatore G.Caspers F.Castel J.F.Cetin S.A.Cogollos C.Dafni T.Davenport M.Dermenev A.Desch K.Díaz-Morcillo A.Döbrich B.Fischer H.Funk W.Gallego J.D.García Barceló J.M.Gardikiotis A.Garza J.G.Gimeno B.Gninenko S.Golm J.Hasinoff M.D.Hoffmann D.H.H.Irastorza I.G.Jakovcic K.Kaminski J.Karuza M.Lakic B.Laurent J.M.Lozano-Guerrero A.J.Luzón G.Malbrunot C.Maroudas M.Miralda-Escudé J.Mirallas H.Miceli L.Navarro P.Ozbey A.Özbozduman K.Peña Garay C.Pivovaroff M.J.Redondo J.Ruz J.Ruiz Chóliz E.Schmidt S.Schumann M.Semertzidis Y.K.Solanki S.K.Stewart L.Tsagris I.Vafeiadis T.Vogel J.K.Widmann E.Wuensch W.Zioutas K.First results of the CAST-RADES haloscope search for axions at 34.67 µeVART-2021-125792We present results of the Relic Axion Dark-Matter Exploratory Setup (RADES), a detector which is part of the CERN Axion Solar Telescope (CAST), searching for axion dark matter in the 34.67 µeV mass range. A radio frequency cavity consisting of 5 sub-cavities coupled by inductive irises took physics data inside the CAST dipole magnet for the first time using this filter-like haloscope geometry. An exclusion limit with a 95% credibility level on the axion-photon coupling constant of ga¿ ¿ 4 × 10-13 GeV-1 over a mass range of 34.6738 µeV < ma< 34.6771 µeV is set. This constitutes a significant improvement over the current strongest limit set by CAST at this mass and is at the same time one of the most sensitive direct searches for an axion dark matter candidate above the mass of 25 µeV. The results also demonstrate the feasibility of exploring a wider mass range around the value probed by CAST-RADES in this work using similar coherent resonant cavities. © 2021, The Author(s).2021http://zaguan.unizar.es/record/11199310.1007/JHEP10(2021)075http://zaguan.unizar.es/record/111993oai:zaguan.unizar.es:111993info:eu-repo/grantAgreement/ES/DGA/E12-R17info:eu-repo/grantAgreement/EC/H2020/674896/EU/The Elusives Enterprise: Asymmetries of the Invisible Universe/ELUSIVESThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 674896-ELUSIVESinfo:eu-repo/grantAgreement/EC/H2020/788781/EU/Towards the detection of the axion with the International Axion Observatory/IAXOplusThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 788781-IAXOplusinfo:eu-repo/grantAgreement/EC/H2020/802836/EU/Axions and relatives across different mass scales/AxScaleThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 802836-AxScaleinfo:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2016-76978-C3-2-Pinfo:eu-repo/grantAgreement/ES/MINECO-FEDER/PGC2018-095328-B-I00info:eu-repo/grantAgreement/ES/MINECO/PID2019-108122GB-C33Journal of High Energy Physics 2021, 10 (2021), 75 [14 pp]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess