/ hep-ex arXiv:1610.02988

Search for invisible decays of sub-GeV dark photons in missing-energy events at the CERN SPS

Banerjee, D. (Zurich, ETH) ; Burtsev, V. (Tomsk Polytechnic U.) ; Cooke, D. (Zurich, ETH) ; Crivelli, P. (Zurich, ETH) ; Depero, E. (Zurich, ETH) ; Dermenev, A.V. (Moscow, INR) ; Donskov, S.V. (Serpukhov, IHEP) ; Dubinin, F. (Lebedev Inst.) ; Dusaev, R.R. (Tomsk Polytechnic U.) ; Emmenegger, S. (Zurich, ETH) ; Fabich, A. (CERN) ; Frolov, V.N. (Dubna, JINR) ; Gardikiotis, A. (Patras U.) ; Gninenko, S.N. (Moscow, INR) ; Hösgen, M. (Bonn U., HISKP) ; Kachanov, V.A. (Serpukhov, IHEP) ; Karneyeu, A.E. (Moscow, INR) ; Ketzer, B. (Bonn U., HISKP) ; Kirpichnikov, D.V. (Moscow, INR) ; Kirsanov, M.M. (Moscow, INR) ; Konorov, I.V. (Lebedev Inst.) ; Kovalenko, S.G. (Santa Maria U., Valparaiso) ; Kramarenko, V.A. (SINP, Moscow) ; Kravchuk, L.V. (Moscow, INR) ; Krasnikov, N.V. (Moscow, INR) ; Kuleshov, S.V. (Santa Maria U., Valparaiso) ; Lyubovitskij, V.E. (Tomsk Polytechnic U.) ; Lysan, V. (Dubna, JINR) ; Matveev, V.A. (Dubna, JINR) ; Mikhailov, Yu.V. (Serpukhov, IHEP) ; Myalkovskiy, V.V. (Dubna, JINR) ; Peshekhonov, V.D. (Dubna, JINR) ; Peshekhonov, D.V. (Dubna, JINR) ; Petuhov, O. (Moscow, INR) ; Polyakov, V.A. (Serpukhov, IHEP) ; Radics, B. (Zurich, ETH) ; Rubbia, A. (Zurich, ETH) ; Samoylenko, V.D. (Serpukhov, IHEP) ; Tikhomirov, V.O. (Lebedev Inst.) ; Tlisov, D.A. (Moscow, INR) ; Toropin, A.N. (Moscow, INR) ; Trifonov, A.Yu. (Tomsk Polytechnic U.) ; Vasilishin, B. (Tomsk Polytechnic U.) ; Vasquez Arenas, G. (Santa Maria U., Valparaiso) ; Ulloa, P. (Santa Maria U., Valparaiso) ; Zhukov, K. (Lebedev Inst.) ; Zioutas, K. (Patras U.)

Pages: 6

Abstract: We report on a direct search for sub-GeV dark photons (A') which might be produced in the reaction e^- Z \to e^- Z A' via kinetic mixing with photons by 100 GeV electrons incident on an active target in the NA64 experiment at the CERN SPS. The A's would decay invisibly into dark matter particles resulting in events with large missing energy. No evidence for such decays was found with 2.75\cdot 10^{9} electrons on target. We set new limits on the \gamma-A' mixing strength and exclude the invisible A' with a mass < 100 MeV as an explanation of the muon g_\mu-2 anomaly.

Web-Page: http://inspirehep.net/record/1490904/files/setup348st_nosize05_two_newmagnet_bold.png; http://inspirehep.net/record/1490904/files/Fig_2_new.png; http://inspirehep.net/record/1490904/files/excl_inv_application_04_59f5b2c_18e8.png; http://inspirehep.net/record/1490904/files/Fig2-1.png; http://inspirehep.net/record/1490904/files/arXiv:1610.02988.pdf

Note: 6 pages, 3 figures; Typos corrected, references added

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 Record created 2016-11-09, last modified 2016-11-09

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