135 research outputs found
Constraint on the solar using 4,000 days of short baseline reactor neutrino data
There is a well known 2 tension in the measurements of the solar
between KamLAND and SNO/Super-KamioKANDE. Precise determination of
the solar is especially important in connection with current and
future long baseline CP violation measurements. Reference \cite{Seo:2018rrb}
points out that currently running short baseline reactor neutrino experiments,
Daya Bay and RENO, can also constrain solar value as demonstrated
by a GLoBES simulation with a limited systematic uncertainty consideration. In
this work, the publicly available data, from Daya Bay (1,958 days) and RENO
(2,200 days) are used to constrain the solar . Verification of our
method through and measurements is
discussed in Appendix A. Using this verified method, reasonable constraints on
the solar are obtained using above Daya Bay and RENO data, both
individually and combined. We find that the combined data of Daya Bay and RENO
set an upper limit on the solar of 18 eV at
the 95% C.L., including both systematic and statistical uncertainties. This
constraint is slightly more than twice the KamLAND value. As this combined
result is still statistics limited, even though driven by Daya Bay data, the
constraint will improve with the additional running of this experiment.Comment: 8 pages, 6 figures, 2 tables. This paper is a follow up of a Monte
Carlo study reported in arXiv:1808.09150 by two of the authors. The current
paper uses actual data from Daya Bay and RENO that was not previously
available and this is the 1st "combined" result using this new experimental
data. A new figure is added. Some modifications of the tex
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