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Lees, J P; Tisserand, V; Kolomensky, Yu G; Fritsch, M; Koch, H; Schroeder, T; Hearty, C; Blinov, V E; Buzykaev, A R; Kravchenko, E A; Onuchin, A P; Skovpen, Yu I; Todyshev, K Yu; Lankford, A J; Gary, J W; Panduro Vazquez, W; Echenard, B; Kim, J; Ongmongkolkul, P; Huard, Z; Meadows, B T; Sun, L; Wagner, S R; Verderi, M; Bettoni, D; Fioravanti, E; Santoro, V; Peruzzi, I M; Zallo, A; Patrignani, C; Bhuyan, B; Mallik, U; Gritsan, A V; Wormser, G; Lange, D J; Coleman, J P; Payne, D J; Touramanis, C; Bevan, A J; Banerjee, Sw; Denig, A G; Gradl, W; Griessinger, K; Hafner, A; Jawahery, A; Roberts, D A; Cowan, R; Robertson, S H; Neri, N; Summers, D J; De Nardo, G; Jessop, C P; Margoni, M; Akar, S; Ben-Haim, E; Bomben, M; Biasini, M; Manoni, E; Rossi, A; Carpinelli, M; Casarosa, G; Chrzaszcz, M; Paoloni, E; Rama, M; Rizzo, G; Faccini, R; Ferrarotto, F; Dittrich, S; Leddig, T; Waldi, R; Adye, T; Emery, S; Convery, M R; Dunwoodie, W; Ebert, M; Field, R C; Fulsom, B G; Kim, P; Luitz, S; MacFarlane, D B; Roodman, A; Wilson, J R; Randle-Conde, A; Puccio, E M T; Alam, M S; Ernst, J A; Soffer, A; Spanier, S M; Lou, X C; Bianchi, F; Vitale, L; Martinez-Vidal, F; Oyanguren, A; Bernlochner, F U; King, G J; Kowalewski, R; Lueck, T; Sobie, R J; Tasneem, N; Harrison, P F
Physical review letters, 09/2017, Letnik: 119, Številka: 13Journal Article
We search for single-photon events in 53 fb^{-1} of e^{+}e^{-} collision data collected with the BABAR detector at the PEP-II B-Factory. We look for events with a single high-energy photon and a large missing momentum and energy, consistent with production of a spin-1 particle A^{'} through the process e^{+}e^{-}→γA^{'}; A^{'}→invisible. Such particles, referred to as "dark photons," are motivated by theories applying a U(1) gauge symmetry to dark matter. We find no evidence for such processes and set 90% confidence level upper limits on the coupling strength of A^{'} to e^{+}e^{-} in the mass range m_{A^{'}}≤8 GeV. In particular, our limits exclude the values of the A^{'} coupling suggested by the dark-photon interpretation of the muon (g-2)_{μ} anomaly, as well as a broad range of parameters for the dark-sector models.
