Multiple-Mediator-Affected Ultra-High-Energy Neutrino Attenuation: Hints for 5D ${U(1)}_{L_{\mu }-L_{\tau }}$ in IceCube

Atri Bhattacharya, Ayushi Kaushik, Kenji Nishiwaki

Recent IceCube observations point to the ultra-high energy neutrino flux exhibiting a very soft spectral nature beyond tens of TeV, which is unexpected from the standard cosmic-ray…