Andreev, Yu M, Banerjee, D, Oberhauser, B Banto, Bernhard, J, Bisio, P, Bondi, M, Burtsev, VE, Celentano, A, Charitonidis, N, Chumakov, AG et al (show 51 more authors)
(2022)
Search for a light Z ' in the L-mu - L-tau scenario with the NA64-e experiment at CERN.
PHYSICAL REVIEW D, 106 (3).
Abstract
The extension of Standard Model made by inclusion of additional U(1) gauge Lμ-Lτ 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′ 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′ 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 2.84×1011 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′ 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.
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 22 Feb 2023 16:22 |
| Last Modified: | 22 Feb 2023 16:22 |
| DOI: | 10.1103/PhysRevD.106.032015 |
| Open Access URL: | https://doi.org/10.1103/PhysRevD.106.032015 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3168567 |
Dimensions
Dimensions
