Descripción
Neutrino oscillations, NMO, NSI, neutrino decay, others
VLVnT 2021 | Parallel Session Room C
https://cern.zoom.us/j/69737018748
The standard model with three flavor neutrino oscillations is supported by the majority of neutrino oscillation data. However, a few experiments have observed anomalies, which are difficult to accommodate within the three flavour framework. One possible explanation of some anomalies is to postulate the existence of light sterile neutrinos.
Neutrino telescopes such as ANTARES and KM3NeT are...
Existing anomalies in experimental results, for neutrino oscillation experiments, may require a fourth, “sterile” neutrino with non-interacting flavor states. Recent sterile neutrino results from the IceCube South Pole Neutrino Observatory, a Cherenkov neutrino experiment using a cubic kilometer of instrumented ice, are presented. Multiple analyses are discussed, including one enabled by a...
Several anomalies in reactor and accelerator neutrino experiments motivate the search for sterile neutrinos at mass splittings in the eV-scale. We present an analysis that probes the elements $U_{\mu4}$ and $U_{\tau4}$ of the extended (3+1) neutrino mixing matrix using an 8 year data sample from IceCube’s DeepCore sub-array containing atmospheric neutrinos between 5 and 300 GeV. The analysis...
In this talk I present the results from our global fit to neutrino oscillation data. Neutrino oscillation experiments have reached a very good level in precision. Due to correlations among parameters a global fit combining many different datasets can give more precise results than a single experiment on its own. I will present the results of the latest global fit performed by our group and...
The IceCube neutrino observatory, along with its DeepCore in-fill array, detects a large amount of atmospheric and astrophysical neutrinos across a wide range of energies from GeV to PeV. DeepCore is sensitive in measuring neutrino oscillation parameters using events in GeV-TeV range. This talk will present an update of muon neutrino disappearance analysis using 8 years of DeepCore data, using...
The determination of neutrino mass ordering (NMO) is one of the prime goals of several neutrino experiments. KM3NeT/ORCA and JUNO are two next-generation neutrino oscillation experiments both aiming at addressing this question. ORCA can determine the NMO by probing Earth matter effects on the oscillation of atmospheric neutrinos in the GeV energy range. JUNO, on the other hand, is sensitive to...
The existence of neutrino masses and tensions between measurements of neutrino mixing parameters indicates there is new physics yet to be discovered. A viable explanation for these discrepancies are non-standard interactions (NSI)— subdominant neutrino-quark interactions not described by the Standard Model (SM). A portion of neutrinos detected by IceCube travel through distances of Earth’s...
Non-standard interactions (NSIs) in the propagation of neutrinos in matter can lead to significant deviations in neutrino oscillations expected within the standard neutrino oscillation framework. These additional interactions would result into an anomalous flux of neutrinos discernible at neutrino telescopes. The ANTARES detector and its next-generation successor, KM3NeT, located in the...
The phenomenon of Neutrino Oscillation has been very well confirmed by a plethora of data; we are now entering a precision era in which the mixing angles and mass differences are going to be measured with unprecedented precision by ongoing and planned experiments. However, the new measurements could reveal that the standard three flavor scenario is not enough for a complete description of...
Numerous astrophysical and cosmological experiments have observed the effects of dark matter, however, its properties have yet to be discovered. Simultaneously, the nature of high-energy astrophysical neutrinos detected by IceCube remains unresolved. If dark matter and neutrinos are coupled to each other, they may exhibit a non-zero elastic scattering cross section. Such an interaction between...
