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Constraints on flavour-dependent long-range forces from atmospheric neutrino observations at Super-Kamiokande
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abstract
In the minimal standard model it is possible to gauge any one of the following global symmetries in an anomaly free way: (i)$L_{e}-L_{\mu}$, (ii) $L_{e}-L_{\tau}$ or (iii) $L_{\mu}-L_{\tau}$. If the gauge boson corresponding to (i) or (ii) is (nearly) massless then it will show up as a long range composition dependent fifth force between macroscopic objects. Such a force will also influence neutrino oscillations due to its flavour-dependence. We show that the latter effect is quite significant in spite of very strong constraints on the relevant gauge couplings from the fifth force experiments. In particular, the $L_{e}- L_{\mu,\tau}$ potential of the electrons in the Sun and the earth is shown to suppress the atmospheric neutrino $\nu_\mu \to \nu_\tau$ oscillations which have been observed at Super-Kamiokande. The Super-K data of oscillation of multi-GeV atmospheric neutrinos can be used to put an upper bound on coupling $\alpha_{e\tau}< 6.4 \times 10^{-52}$ and $\alpha_{e\mu}< 5.5 \times 10^{-52}$at 90% CL when the range of the force is the earth-sun distance. This is an improvement by two orders on the earlier fifth force bounds in this range.
Forward citations
Cited by 6 Pith papers
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Probing Neutrinophilic Long-Range Forces at DUNE
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No evidence for long-range neutrino interactions from a broad class of anomaly-free U(1)' symmetries is found in 8 years of IceCube DeepCore atmospheric data, producing stringent constraints on the corresponding LRI p...
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Generalised $\mu$-$\tau$ symmetries and calculable gauge kinetic and mass mixing in $U(1)_{L_\mu-L_\tau}$ models
The authors compute the previously arbitrary Z-Z' kinetic and mass mixing at one loop in two L_mu-L_tau models, finding a suppressed mixing in a seesaw version and a non-decoupling mixing in a vectorlike-lepton version.
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Probing long-range $L_e-L_\mu$ forces with supernova neutronization burst neutrinos
DUNE can use a nearby supernova neutronization burst to constrain ultralight Le−Lμ gauge forces via distortions of the electron-neutrino survival probability.
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Constraints on flavor-dependent long-range interactions of high-energy astrophysical neutrinos
Using the flavor composition of TeV-PeV astrophysical neutrinos, the authors place 95% C.L. upper limits on flavor-dependent long-range neutrino interactions near 10^-19 eV, and IceCube-Gen2 should improve them by abo...
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Flavor-Dependent Long-Range Neutrino Interactions in DUNE and T2HK: Synergy Breeds Power
Combining DUNE and T2HK projections yields tighter constraints on flavor-dependent long-range neutrino interactions than either experiment alone.
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