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Search for Invisible Decays of a Dark Photon Produced in e+e- Collisions at B a B ar

  • Author(s): Lees, JP
  • Poireau, V
  • Tisserand, V
  • Grauges, E
  • Palano, A
  • Eigen, G
  • Brown, DN
  • Derdzinski, M
  • Giuffrida, A
  • Kolomensky, YG
  • Fritsch, M
  • Koch, H
  • Schroeder, T
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • So, RY
  • Blinov, VE
  • Buzykaev, AR
  • Druzhinin, VP
  • Golubev, VB
  • Kravchenko, EA
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, YI
  • Solodov, EP
  • Todyshev, KY
  • Lankford, AJ
  • Gary, JW
  • Long, O
  • Eisner, AM
  • Lockman, WS
  • Panduro Vazquez, W
  • Chao, DS
  • Cheng, CH
  • Echenard, B
  • Flood, KT
  • Hitlin, DG
  • Kim, J
  • Miyashita, TS
  • Ongmongkolkul, P
  • Porter, FC
  • Röhrken, M
  • Huard, Z
  • Meadows, BT
  • Pushpawela, BG
  • Sokoloff, MD
  • Sun, L
  • Smith, JG
  • Wagner, SR
  • Bernard, D
  • Verderi, M
  • Bettoni, D
  • Bozzi, C
  • Calabrese, R
  • Cibinetto, G
  • Fioravanti, E
  • Garzia, I
  • Luppi, E
  • Santoro, V
  • Calcaterra, A
  • De Sangro, R
  • Finocchiaro, G
  • Martellotti, S
  • Patteri, P
  • Peruzzi, IM
  • Piccolo, M
  • Rotondo, M
  • Zallo, A
  • Passaggio, S
  • Patrignani, C
  • Lacker, HM
  • Bhuyan, B
  • Mallik, U
  • Chen, C
  • Cochran, J
  • Prell, S
  • Ahmed, H
  • Gritsan, AV
  • Arnaud, N
  • Davier, M
  • et al.
Abstract

© 2017 American Physical Society. 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 mA′≤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.

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