Search for teta 1 3 mixing parameter with the low power reactor

Abstract

One of the main problems of neutrino physics is the measurement of mixing parameter sin2(2 teta 1 3). At present time several projects of reactor experiments with sensitivity of sin2(2 teta 1 3) ~ 0.01 are under discussion. Practically, all of them are based on the principle 'one reactor- two detectors'. Such approach suppose to use NPP reactor with power of several GW as the source of neutrino and two detectors of similar configuration placed at different distance from the reactor. The sistematic error in such experiments may reach ~ 1% and the accuracy ~ 0.01 as the result. In this paper we propose to use for the measurement of sin2(2 teta 1 3) the existing SuperKamiokande (SK) set-up in combination with 'own' antineutrino source - nuclear reactor of small thermal power ~ 300MW (LPR). Such experiment could be carried out in relatively short time. As it was shown by the study of different detection mechanisms, the combination LPR-SK allows to obtain the sensitivity of sin2(2 teta 1 3) ~ 0.002.