Abstract
The reactor antineutrinos are used for the precise measurement of oscillation parameters in the 3-neutrino model, and also used to investigate active-sterile neutrino mixing sensitivity in the 3+1 neutrino framework. In the present work, we study the feasibility of sterile neutrino search with the indian scintillator matrix for reactor anti-neutrino (ISMRAN) experimental set-up using electron antineutrinos ({overline{nu }}_e) produced from reactor as a source. The so-called 3+1 scenario is considered for active-sterile neutrino mixing, which leads to projected exclusion curves in the sterile neutrino mass and mixing angle plane. The analysis is performed considering both the reactor and detector related parameters. It is found that, the ISMRAN set-up can observe the active-sterile neutrino mixing sensitivity for sin ^{2}2theta _{14} ge 0.064 and varDelta m^{2}_{41} = 1.0hbox {eV}^2 at 90% confidence level for an exposure of 1 ton-year by using neutrinos produced from the DHRUVA reactor with thermal power of 100 hbox {MW}_{{th}}. It is also observed that, there is a significant improvement of the active-sterile neutrino mixing parameter sin ^{2}2theta _{14} to sim 0.03 at the same varDelta m^{2}_{41} by putting the ISMRAN detector set-up at a distance of 20 m from the compact proto-type fast breeder reactor facility with thermal power of 1250 hbox {MW}_{{th}}.
Highlights
The L dependence is what gives the cleanest signal in the case of the sterile neutrino, and studying the ratio of the spectra measured at two different distances allows to avoid the problem of the theoretical spectrum
The DANSS group has performed the experiment at 3 distances from reactor core varied from 10.7 m to 12 m to find out the active-sterile neutrino mixing by measuring the positron energy spectra
This paper presents the results of an investigation on finding a possible mixing of a single sterile neutrino with the three known active neutrinos, vi z. the (3 + 1) model
Summary
The DANSS group has performed the experiment at 3 distances from reactor core varied from 10.7 m to 12 m to find out the active-sterile neutrino mixing by measuring the positron energy spectra. They have observed that the excluded area in the s i n22θ14. The PFBR has dimension of about 1 m both in radius and height (defined as a compact source), and can operate at a maximum thermal power of 1250 MWth. As the reactor is compact and produces higher thermal power, it is an ideal case to utilize the detector set-up for investigating the active-sterile neutrino mixing.
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