@article{87a152b4756747fc81eff9f74228aecf,
title = "First Results in the Search for Dark Sectors at NA64 with the CERN SPS High Energy Muon Beam",
abstract = "We report the first search for dark sectors performed at the NA64 experiment employing a high energy muon beam and a missing energy-momentum technique. Muons from the M2 beamline at the CERN Super Proton Synchrotron with a momentum of 160 GeV/c are directed to an active target. The signal signature consists of a single scattered muon with momentum <80 GeV/c in the final state, accompanied by missing energy, i.e., no detectable activity in the downstream calorimeters. For a total dataset of (1.98±0.02)×1010 muons on target, no event is observed in the expected signal region. This allows us to set new limits on the remaining (mZ′,gZ′) parameter space of a new Z′ (Lμ-Lτ) vector boson which could explain the muon (g-2)μ anomaly. Additionally, our study excludes part of the parameter space suggested by the thermal dark matter relic abundance. Our results pave the way to explore dark sectors and light dark matter with muon beams in a unique and complementary way to other experiments.",
author = "{The ATLAS collaboration} and Andreev, {Yu M.} and D. Banerjee and {Banto Oberhauser}, B. and J. Bernhard and P. Bisio and N. Charitonidis and P. Crivelli and E. Depero and Dermenev, {A. V.} and Donskov, {S. V.} and Dusaev, {R. R.} and T. Enik and Frolov, {V. N.} and A. Gardikiotis and Gertsenberger, {S. V.} and S. Girod and Gninenko, {S. N.} and M. H{\"o}sgen and R. Joosten and Kachanov, {V. A.} and Y. Kambar and Karneyeu, {A. E.} and Kasianova, {E. A.} and G. Kekelidze and B. Ketzer and Kirpichnikov, {D. V.} and Kirsanov, {M. M.} and Kolosov, {V. N.} and Kramarenko, {V. A.} and Kravchuk, {L. V.} and Krasnikov, {N. V.} and Kuleshov, {S. V.} and Lyubovitskij, {V. E.} and V. Lysan and Matveev, {V. A.} and {Mena Fredes}, R. and {Mena Yanssen}, {R. G.} and {Molina Bueno}, L. and M. Mongillo and Peshekhonov, {D. V.} and Polyakov, {V. A.} and B. Radics and Salamatin, {K. M.} and Samoylenko, {V. D.} and Shchukin, {D. A.} and O. Soto and H. Sieber and Tikhomirov, {V. O.} and Tlisova, {I. V.} and J. Zamora-Sa{\'a}",
note = "Publisher Copyright: {\textcopyright} 2024 authors. Published by the American Physical Society.",
year = "2024",
month = may,
day = "24",
doi = "10.1103/PhysRevLett.132.211803",
language = "English",
volume = "132",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "21",
}