Kavli Affiliate: Jia Liu
| First 5 Authors: , , , ,
| Summary:
We investigate a fifth force mediated by a light vector boson that couples to
lepton spins, characterized by axial-vector couplings to leptons and vector
couplings to nucleons. This interaction generates a potential proportional to
the inner product of the lepton spin vector and the nucleon-lepton relative
velocity vector, a feature extensively explored with precision spin sensors.
Employing weak symmetry, we show that left-handed charged lepton couplings
naturally extend to left-handed neutrinos, enabling this fifth force to
influence neutrino oscillations. For electron-nucleon couplings, we find that
solar and reactor neutrino experiments provide comparable constraints to those
from spin sensors and surpass them in the short-range fifth force region. For
muon-nucleon couplings, neutrino oscillation experiments exclude the fifth
force as a viable explanation for the muon $ g-2 $ anomaly in the context of a
vector mediator, tightening the bounds by two orders of magnitude in coupling
strength by solar and atmospheric neutrino data. Our results highlight the
critical role of neutrino oscillations in probing fifth forces acting across
all three generations of lepton spins.
| Search Query: ArXiv Query: search_query=au:”Jia Liu”&id_list=&start=0&max_results=3