Revisiting constraints on 3 + 1 active-sterile neutrino mixing using IceCube data

Abstract

Recent IceCube search results for sterile neutrino increased tension between the combined appearance and disappearance experiments. On the other hand, MiniBooNE latest data confirms at 4.9σ CL the short-baseline oscillation anomaly. We analyze published IceCube data based on two different active-sterile mixing schemes using one additional sterile neutrino flavor. We present exclusion regions in the parameter ranges 0.01 ≤ sin 2 θ 24 ≤ 0.1 and 0.1 eV 2 ≤ ∆m 2 42 ≤ 10 eV 2 for the mass-mixing and flavormixing schemes. Under the more conservative mass-mixing scheme, 3σ CL allowed regions for the appearance experiment and MiniBooNE latest result are excluded at 3σ CL. In case of less-restrictive flavor-mixing scheme, results from the appearance experiments are excluded at 2σ CL. We also find that including prompt component of the atmospheric neutrino flux relaxes constraints on sterile mixing for ∆m 2 42 1 eV 2 .

Searching for eV-scale sterile neutrinos with eight years of atmospheric neutrinos at the IceCube Neutrino Telescope

“…One of the strongest constraints on sterile-neutrinoinduced ν μ andν μ disappearance is from the study of high-energy atmospheric neutrinos observed by IceCube [95,96]. The IceCube Neutrino Observatory [97] is a gigaton ice-Cherenkov detector located near the South Pole.…”

eV-Scale Sterile Neutrino Search Using Eight Years of Atmospheric Muon Neutrino Data from the IceCube Neutrino Observatory

“…Evidence for oscillation effects beyond the three-neutrino paradigm inν μ disappearance are yet to be observed [45]. One of these nonobservations was made by IceCube, using a sample of 20 145 atmospheric ν μ andν μ events collected over one year of detector livetime [29,64]. This Letter updates IceCube's high-energy sterile neutrino search using an eight-year dataset and improved event selection.…”

Probing Lorentz Invariance Violation with atmospheric neutrinos at INO-ICAL

“…The upward-going neutrinos travel deep inside the Earth and experience Earth's matter effect [29][30][31][32][33][34][35][36][37][38] due to the interactions with ambient electrons. Apart from providing crucial information on standard three-flavor oscillation parameters, the atmospheric neutrinos can also play an important role to probe various BSM scenarios like non-standard interactions (NSI) [29,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56], sterile neutrinos [57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72], neutrino decay [73][74][75...…”