A Comprehensive Study of the Discovery Potential of NO nu A, T2K, and T2HK Experiments

作者：Soumya C; Deepthi K N; Mohanta R^*

来源：Advances in High Energy Physics, 2016, 2016: 9139402.

DOI：10.1155/2016/9139402

With the recent measurement of reactor mixing angle theta(13) the knowledge of neutrino oscillation parameters has improved significantly except the CP violating phase delta(CP), mass hierarchy, and the octant of the atmospheric mixing angle theta(23). Many dedicated experiments are proposed to determine these parameters which may take at least 10 years from now to become operational. It is therefore very crucial to use the results from the existing experiments to see whether we can get even partial answers to these questions. In this paper we study the discovery potential of the ongoing NO nu A and T2K experiments as well as the forthcoming T2HK experiment in addressing these questions. In particular, we evaluate the sensitivity of NO nu A to determine neutrino mass hierarchy, octant degeneracy, and delta(CP) after running for its scheduled period of 3 years in neutrino mode and 3 years in antineutrino mode. We then extend the analysis to understand the discovery potential if the experiments will run for (5 nu+5 (nu) over bar) years and (7 nu+3 (nu) over bar) years. We also show how the sensitivity improves when we combine the data from NO nu A, T2K, and T2HK experiments with different combinations of run period. The CP violation sensitivity is marginal for T2K and NO nu A experiments even for ten-year data taking of NO nu A. T2HK has a significance above 5 sigma for a fraction of two-fifths values of the delta(CP) space. We also find that delta(CP) can be determined to be better than 35 degrees, 21 degrees, and 9 degrees for all values of delta(CP) for T2K, NO nu A, and T2HK respectively.

• 出版日期2016