Search for a light Z′ in the Lμ−Lτ scenario with the NA64-e experiment at CERN; Physical Review D; Vol. 106, iss. 3
| Parent link: | Physical Review D: particles, fields, gravitation, and cosmology Vol. 106, iss. 3.— 2022.— 032015, 12 p. |
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| Další autoři: | , , , , , , , |
| Shrnutí: | Title screen The extension of Standard Model made by inclusion of additional U(1) gauge Lµ-Lt 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 2.84Ч1011 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. |
| Jazyk: | angličtina |
| Vydáno: |
2022
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| Témata: | |
| On-line přístup: | http://earchive.tpu.ru/handle/11683/132547 https://doi.org/10.1103/PhysRevD.106.032015 |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669490 |