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- Title
A closer look at the U(1)<sub>B−L</sub> explanation of the ATOMKI nuclear anomalies.
- Authors
Ferreira, P. M.; Gonçalves, B. L.; Joaquim, F. R.
- Abstract
We revisit the gauged U(1)B−L explanation of the ATOMKI nuclear anomalies, in which the new gauge boson is the hypothetical X(17) particle. It is known that the vanilla B − L scenario is unable to account for appropriate couplings, namely the suppression of the couplings of X(17) to neutrinos, which motivates adding vector-like leptons. The simplest case, in which the new fields have B − L charges equal to 1, is highly disfavoured since it requires large mixing with the Standard Model fields. One solution recently put forward is to consider large B − L charges to counterbalance small mixing. We show that, in this scenario, and after taking into account several phenomenological constraints, the dominant contribution to the muon anomalous magnetic moment (g − 2)μ is expected to be extremely large and with a negative sign, being thus excluded by experiment.
- Subjects
MUONS; GAUGE bosons; MAGNETIC moments; NEUTRINOS; EXPLANATION; VANILLA
- Publication
Journal of High Energy Physics, 2024, Vol 2024, Issue 4, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP04(2024)003