Probing new physics with atmospheric neutrinos at KM3NeT-ORCA

International audienceWe present the prospects of ORCA searches for new physics phenomena using atmospheric neutrinos. Focus is given to exploiting the impact of strong matter effects on the oscillation of atmospheric neutrinos in light of expanded models, such as sterile neutrinos and non-standard interactions. In the presence of light sterile neutrinos that mix with active neutrinos, additional resonances and suppressions may occur at different energies. One may also use neutrino oscillations to probe the properties of the coherent forward scattering which may be altered by new interactions beyond the Standard Model. Preliminary studies show that ORCA would be able to probe some parameters of these models with sensitivity up to one order of magnitude better than current constraints

Decoherence, matter effect, and neutrino hierarchy signature in long baseline experiments

International audienceEnvironmental decoherence of oscillating neutrinos of strength Γ=(2.3±1.1)×10-23  GeV can explain how maximal θ23 mixing observed at 295 km by T2K appears to be nonmaximal at longer baselines. As shown recently by R. Oliveira, the Mikheyev-Smirnov-Wolfenstein matter effect for neutrinos is altered by decoherence: in normal (inverted) mass hierarchy, a resonant enhancement of νμ(ν¯μ)→νe(ν¯e) occurs for 6<Eν<20  GeV. Thus decoherence at the rated strength may be detectable as an excess of charged-current νe events in the full νμ exposures of MINOS+ and OPERA

Neutrino oscillation tomography of the Earth with KM3NeT-ORCA

International audienceKM3NeT-ORCA is a water-Cherenkov neutrino detector designed for studying the oscillations of atmospheric neutrinos, with the primary objective of measuring the neutrino mass ordering. Atmospheric neutrinos crossing the Earth undergo matter effects, modifying the pattern of their flavour oscillations. The study of the angular and energy distribution of neutrino events in ORCA can therefore provide tomographic information on the Earth’s interior with an independent technique, complementary to the standard geophysics methods. Preliminary estimations based on a full Monte Carlo simulation of the detector response show that after ten years of operation the electron density can be measured with a precision of 3-5% in the mantle and 7-10% in the outer core – depending on the mass ordering

Snowmass Neutrino Frontier: NF01 Topical Group Report on Three-Flavor Neutrino Oscillations

This is the report from the Snowmass NF01 topical group and colleagues on the current status and expected future progress to understand the three-flavor neutrino oscillation picture

Snowmass Neutrino Frontier: NF01 Topical Group Report on Three-Flavor Neutrino Oscillations

This is the report from the Snowmass NF01 topical group and colleagues on the current status and expected future progress to understand the three-flavor neutrino oscillation picture

Snowmass Neutrino Frontier: NF01 Topical Group Report on Three-Flavor Neutrino Oscillations

This is the report from the Snowmass NF01 topical group and colleagues on the current status and expected future progress to understand the three-flavor neutrino oscillation picture

Snowmass Neutrino Frontier: NF01 Topical Group Report on Three-Flavor Neutrino Oscillations

This is the report from the Snowmass NF01 topical group and colleagues on the current status and expected future progress to understand the three-flavor neutrino oscillation picture