Agnes, P.P.AgnesAlbuquerque, I. F.M.I. F.M.AlbuquerqueAlexander, T.T.AlexanderAlton, A. K.A. K.AltonAve, M.M.AveBack, H. O.H. O.BackBatignani, G.G.BatignaniBiery, K.K.BieryBocci, V.V.BocciBonivento, W. M.W. M.BoniventoBottino, B.B.BottinoBussino, S.S.BussinoCadeddu, M.M.CadedduCadoni, M.M.CadoniCalaprice, F.F.CalapriceCaminata, A.A.CaminataCampos, M. D.M. D.CamposCanci, N.N.CanciCaravati, M.M.CaravatiCargioli, N.N.CargioliCariello, M.M.CarielloCarlini, M.M.CarliniCataudella, V.V.CataudellaCavalcante, P.P.CavalcanteCAVUOTI, STEFANOSTEFANOCAVUOTIChashin, S.S.ChashinChepurnov, A.A.ChepurnovCicalò, C.C.CicalòCovone, G.G.CovoneD'Angelo, D.D.D'AngeloDavini, S.S.DaviniDe Candia, A.A.De CandiaDe Cecco, S.S.De CeccoDe Filippis, G.G.De FilippisDE ROSA, GiorgiaGiorgiaDE ROSADerbin, A. V.A. V.DerbinDevoto, A.A.DevotoD'Incecco, M.M.D'InceccoDionisi, C.C.DionisiDordei, F.F.DordeiDowning, M.M.DowningD'Urso, D.D.D'UrsoFiorillo, G.G.FiorilloFranco, D.D.FrancoGabriele, F.F.GabrieleGalbiati, C.C.GalbiatiGhiano, C.C.GhianoGiganti, C.C.GigantiGiovanetti, G. K.G. K.GiovanettiGoretti, A. M.A. M.GorettiGrilli Di Cortona, G.G.Grilli Di CortonaGrobov, A.A.GrobovGromov, M.M.GromovGuan, M.M.GuanGulino, M.M.GulinoHackett, B. R.B. R.HackettHerner, K.K.HernerHessel, T.T.HesselHosseini, B.B.HosseiniHubaut, F.F.HubautHungerford, E. V.E. V.HungerfordIanni, AnAnIanniIppolito, V.V.IppolitoKeeter, K.K.KeeterKendziora, C. L.C. L.KendzioraKimura, M.M.KimuraKochanek, I.I.KochanekKorablev, D.D.KorablevKorga, G.G.KorgaKubankin, A.A.KubankinKuss, M.M.KussLa Commara, M.M.La CommaraLai, M.M.LaiLi, X.X.LiLissia, M.M.LissiaLongo, G.G.LongoLychagina, O.O.LychaginaMachulin, I. N.I. N.MachulinMapelli, L. P.L. P.MapelliMari, S. M.S. M.MariMaricic, J.J.MaricicMessina, A.A.MessinaMilincic, R.R.MilincicMonroe, J.J.MonroeMorrocchi, M.M.MorrocchiMougeot, X.X.MougeotMuratova, V. N.V. N.MuratovaMusico, P.P.MusicoNozdrina, A. O.A. O.NozdrinaOleinik, A.A.OleinikOrtica, F.F.OrticaPagani, L.L.PaganiPallavicini, M.M.PallaviciniPandola, L.L.PandolaPantic, E.E.PanticPaoloni, E.E.PaoloniPelczar, K.K.PelczarPelliccia, N.N.PellicciaPiacentini, S.S.PiacentiniPocar, A.A.Pocar2025-02-252025-02-2520230031-9007http://hdl.handle.net/20.500.12386/36181We present a search for dark matter particles with sub-GeV/c2 masses whose interactions have final state electrons using the DarkSide-50 experiment's (12 306±184) kg d low-radioactivity liquid argon exposure. By analyzing the ionization signals, we exclude new parameter space for the dark matter-electron cross section σ¯e, the axioelectric coupling constant gAe, and the dark photon kinetic mixing parameter κ. We also set the first dark matter direct-detection constraints on the mixing angle |Ue4|2 for keV/c2 sterile neutrinos.STAMPAenArticle10.1103/PhysRevLett.130.1010022-s2.0-85150917862https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.130.101002https://api.elsevier.com/content/abstract/scopus_id/851509178622023PhRvL.130j1002AFIS/05 - ASTRONOMIA E ASTROFISICA