We present the first detailed study of Standard Model neutrino tridents involving tau leptons at the near detectors of accelerator neutrino facilities. The rates of these processes were previously thought to be negligible, even at future facilities. Our full $2\to 4$ calculation, including both coherent and incoherent scatterings, reveals that
the DUNE near detector could observe a...
Accelerator-based experiments provide a versatile platform for probing dark matter models that interact feebly with Standard Model particles. The DUNE Near Detector (ND), designed primarily for precision neutrino property measurements, is also poised to play a pivotal role in exploring sub-GeV scale dark matter via multiple search strategies. Leveraging the high-intensity proton beam, DUNE ND...
The KM3NeT collaboration recently reported the observation of KM3-230213A, a neutrino event with an energy of 220 PeV, nearly an order of magnitude more energetic than the highest-energy neutrino in IceCube’s catalog. Despite its larger effective area and longer data-taking period, IceCube has not observed similar events, leading to a tension quantified between ~2$\sigma$ and 3.5$\sigma$,...
Long-baseline neutrino experiments are currently measuring the oscillation parameters with unprecedented precision. Recent standard oscillation results from NOvA and T2K, however, show a moderate tension in the preferred value of the CP-violating phase $\delta_{\text{CP}}$, motivating the exploration of physics beyond the standard oscillation framework. Non-Standard Interactions (NSI) in...
We explore the possibility that the right-handed neutrino Majorana mass originates from electroweak symmetry breaking. Working within an effective theory with two Higgs doublets, nonzero lepton number is assigned to the bilinear operator built from the two Higgs fields, which is then coupled to the right-handed neutrino mass operator. In tandem with the neutrino Yukawa coupling, following...
