An interacting sterile neutrino component via pseudoscalar mediator reconciles CMB and DESI DR2 BAO measurements with 2.7 sigma preference and reduces H0 tension to 2.4 sigma.
Bounds on the Coupling of the Majoron to Light Neutrinos from Supernova Cooling
4 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We explore the role of Majoron ($J$) emission in the supernova cooling process, as a source of upper bound on neutrino-Majoron coupling. We show that the strongest upper bound on the coupling to $\nu_e$ comes from the $\nu_e\nu_e \to J $ process in the core of a supernova. We also find bounds on diagonal couplings of the Majoron to $\nu_{\mu(\tau)}\nu_{\mu(\tau)}$ and on off-diagonal $\nu_e \nu_{\mu (\tau)}$ couplings in various regions of the parameter space. We discuss the evaluation of the cross-section for four-particle interactions ($\nu \nu \to JJ$ and $\nu J \to \nu J$). We show that these are typically dominated by three-particle sub-processes and do not give new independent constraints.
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IceCube astrophysical neutrino data is analyzed for flavor ratios and spectral shapes to constrain scalar non-standard neutrino interactions via induced pseudo-Dirac behavior.
Models scalar-mediated νSI on the DSNB in a full three-flavor PMNS framework for four coupling structures and projects 3σ sensitivities at JUNO, Hyper-Kamiokande-Gd, and DUNE reaching g∼10^{-8} for m_ϕ∼100-300 eV.
Hybrid HF-CRPA calculations predict lower allowed cross sections for charged-current ν_e on 40Ar at low energies, leading to ~20% fewer events in DUNE for a galactic supernova burst than the prior MARLEY model.
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Recoupled Dark Radiation reconciling CMB and DESI BAO measurements
An interacting sterile neutrino component via pseudoscalar mediator reconciles CMB and DESI DR2 BAO measurements with 2.7 sigma preference and reduces H0 tension to 2.4 sigma.
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Probing Scalar Non-Standard Neutrino Interactions using High-Energy Astrophysical Neutrinos
IceCube astrophysical neutrino data is analyzed for flavor ratios and spectral shapes to constrain scalar non-standard neutrino interactions via induced pseudo-Dirac behavior.
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Diffuse Supernova Neutrinos with Secret Neutrino Interactions
Models scalar-mediated νSI on the DSNB in a full three-flavor PMNS framework for four coupling structures and projects 3σ sensitivities at JUNO, Hyper-Kamiokande-Gd, and DUNE reaching g∼10^{-8} for m_ϕ∼100-300 eV.
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Continuum contribution to charged-current absorption of low-energy $\nu_e$ on $^{40}$Ar
Hybrid HF-CRPA calculations predict lower allowed cross sections for charged-current ν_e on 40Ar at low energies, leading to ~20% fewer events in DUNE for a galactic supernova burst than the prior MARLEY model.