@Article{NA64CollaborationAndreev+MolinaBueno2022,
author="NA64 Collaboration (Andreev, Y. M. et al
and Molina Bueno, L.",
title="Search for a light Z{\textquoteright} in the L-mu -- L-tau scenario with the NA64-e experiment at CERN",
journal="Physical Review D",
year="2022",
publisher="Amer Physical Soc",
volume="106",
number="3",
pages="032015--12pp",
abstract="The extension of Standard Model made by inclusion of additional U(1) gauge L-mu -- L-tau symmetry can explain the difference between the measured and the predicted value of the muon magnetic moment and solve the tension in B meson decays. This model predicts the existence of a new, light Z{\textquoteright} vector boson, predominantly coupled to second and third generation leptons, whose interaction with electrons is due to a loop mechanism involving muons and taus. In this work, we present a rigorous evaluation of the upper limits in the Z{\textquoteright} parameter space, obtained from the analysis of the data collected by the NA64-e experiment at CERN SPS, that performed a search for light dark matter with 2.84 x 10(11) electrons impinging with 100 GeV on an active thick target. The resulting limits touch the muon g -- 2 preferred band for values of the Z{\textquoteright} mass of order of 1 MeV, while the sensitivity projections for the future high-statistics NA64-e runs demonstrate the power of the electrons/positron beam approach in this theoretical scenario.",
optnote="WOS:000862798400003",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5376), last updated on Wed, 19 Oct 2022 07:28:36 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.106.032015",
opturl="https://arxiv.org/abs/2206.03101",
opturl="https://doi.org/10.1103/PhysRevD.106.032015",
language="English"
}