2025/05/20 by M Petropavlova, Petropavlova, Maria
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Dark Matter and Cosmic Phenomena
paper · pdf · doi:10.48550/arxiv.2505.14332
We present new constraints on neutrino secret interactions (νSI) by studying high-energy neutrinos from well-known astrophysical sources, such as SN1987A, the blazars TXS 0506+056 and PKS 0735+178, the active galaxy NGC 1068, and the KM3-230213A neutrino event. We expand existing limits by probing a previously unconstrained region of the mediator mass parameter space. Our study focuses on Dirac neutrinos interacting with a massive spin-one boson as they propagate through the Cosmic Neutrino Background, while also examining Majorana and Dirac neutrinos scattering via a scalar mediator. We consider both ultra-relativistic and non-relativistic regimes, establishing bounds on the νSI coupling constant across the wide νSI mediator mass range. Our results, obtained using analytical methods, demonstrate significant constraints on the νSI vector coupling in the low mediator mass region, compared to the scalar coupling scenario.