@article{6ec97aa5e3f54269ad43a936ab006069,
title = "Constraints on New Physics in Electron g-2 from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector",
abstract = "We performed a search for a new generic X boson, which could be a scalar (S), pseudoscalar (P), vector (V), or an axial vector (A) particle produced in the 100 GeV electron scattering off nuclei, e-Z→e-ZX, followed by its invisible decay in the NA64 experiment at CERN. No evidence for such a process was found in the full NA64 dataset of 2.84×1011 electrons on target. We place new bounds on the S, P, V, A coupling strengths to electrons, and set constraints on their contributions to the electron anomalous magnetic moment ae, |ΔaX|?10-15-10-13 for the X mass region 1 MeV?mX?1 GeV. These results are an order of magnitude more sensitive compared to the current accuracy on ae from the electron g-2 experiments and recent high-precision determination of the fine structure constant.",
author = "{(NA64 Collaboration)} and Andreev, {Yu M.} and D. Banerjee and J. Bernhard and Burtsev, {V. E.} and Chumakov, {A. G.} and D. Cooke and P. Crivelli and E. Depero and Dermenev, {A. V.} and Donskov, {S. V.} and Dusaev, {R. R.} and T. Enik and N. Charitonidis and A. Feshchenko and Frolov, {V. N.} and A. Gardikiotis and Gerassimov, {S. G.} and Gninenko, {S. N.} and M. H{\"o}sgen and Kachanov, {V. A.} and Karneyeu, {A. E.} and G. Kekelidze and B. Ketzer and Kirpichnikov, {D. V.} and Kirsanov, {M. M.} and Kolosov, {V. N.} and Konorov, {I. V.} and Kovalenko, {S. G.} 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 Mikhailov, {Yu V.} and {Molina Bueno}, L. and Peshekhonov, {D. V.} and Polyakov, {V. A.} and B. Radics and R. Rojas and A. Rubbia and Samoylenko, {V. D.} and H. Sieber and D. Shchukin and Tikhomirov, {V. O.} and I. Tlisova and Toropin, {A. N.} and Trifonov, {A. Yu} and Vasilishin, {B. I.}",
note = "Publisher Copyright: {\textcopyright} 2021 authors.",
year = "2021",
month = may,
day = "25",
doi = "10.1103/PhysRevLett.126.211802",
language = "English",
volume = "126",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "21",
}