Abstract
We present a comprehensive analysis in the 3+1 active-sterile neutrino oscillation scenario for the sensitivity of the ESSnuSB experiment in the presence of light sterile neutrinos assuming both a far (FD) and a near (ND) detector. Our analysis show that when the ND is included, the results are significantly different compared to the ones obtained with the FD only. We find that the capability of ESSnuSB to constrain the sterile mixing parameters is sin2 2θμe∼ 10−4 for ∆m2 = 1 eV2 if the ND is included and it becomes sin2 2θμe∼ 10−2 without the ND. Furthermore, we show that the sensitivity can go down to sin2 2θμe∼ 10−3 for the most conservative choice of the systematics on the ND. Comparing the sensitivity with T2HK, T2HKK, and DUNE by considering the FD only, we find that the sensitivity of ESSnuSB is smaller for most of the parameter space. Studying the CP violation sensitivity, we find that if the ND is included, it can be larger in the 3+1 scenario than in the standard one. However, if the ND is not included, the sensitivity is smaller compared to the one in the standard scenario. We also find that the CP violation sensitivity due to δ13 is larger compared to the one induced by δ24. The sensitivities are slightly better for the dominant neutrino running ratio of ESSnuSB.
Highlights
JHEP03(2020)026 such experiments, protons are collided on a fix target to produce pions and the pions decay to produce muon and antimuon neutrinos having energies from hundreds of MeV to a few GeV
We present a comprehensive analysis in the 3+1 active-sterile neutrino oscillation scenario for the sensitivity of the ESSnuSB experiment in the presence of light sterile neutrinos assuming both a far (FD) and a near (ND) detector
As the sensitivities of T2HK, T2HKK, and DUNE are obtained assuming an far detector (FD) only, we present our results of ESSnuSB considering an FD only and assuming an overall systematics of 8 % in the signal and 10 % in the background
Summary
JHEP03(2020) such experiments, protons are collided on a fix target to produce pions and the pions decay to produce muon and antimuon neutrinos having energies from hundreds of MeV to a few GeV. These neutrinos are detected by a far detector (FD) at a distance which is suitable to study neutrino oscillations that are governed by ∆m231. ESSnuSB is a proposed long-baseline neutrino oscillation experiment in Sweden In this experiment, the neutrinos will be produced by a proton beam of energy 2.5 GeV. The full 4 × 4 leptonic mixing matrix U can be parametrised through successive two-dimensional rotations as [7]
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