High Precision Measurements of $θ_{\odot}$ in Solar and Reactor Neutrino Experiments
| dc.creator | Bandyopadhyay, Abhijit | |
| dc.creator | Choubey, Sandhya | |
| dc.creator | Goswami, Srubabati | |
| dc.creator | Petcov, S. T. | |
| dc.date | 2004-10-20 | |
| dc.date | 2005-08-22 | |
| dc.date.accessioned | 2026-07-07T11:31:40Z | |
| dc.date.available | 2026-07-07T11:31:40Z | |
| dc.description | We discuss the possibilities of high precision measurement of the solar neutrino mixing angle $θ_\odot \equiv θ_{12}$ in solar and reactor neutrino experiments. The improvements in the determination of $\sin^2θ_{12}$, which can be achieved with the expected increase of statistics and reduction of systematic errors in the currently operating solar and KamLAND experiments, are summarised. The potential of LowNu $ν-e$ elastic scattering experiment, designed to measure the $pp$ solar neutrino flux, for high precision determination of $\sin^2θ_{12}$, is investigated in detail. The accuracy in the measurement of $\sin^2θ_{12}$, which can be achieved in a reactor experiment with a baseline $L \sim (50-70)$ km, corresponding to a Survival Probability MINimum (SPMIN), is thoroughly studied. We include the effect of the uncertainty in the value of $\sin^2θ_{13}$ in the analyses. A LowNu measurement of the $pp$ neutrino flux with a 1% error would allow to determine $\sin^2θ_{12}$ with an error of 14% (17%) at 3$σ$ from a two-generation (three-generation) analysis. The same parameter $\sin^2θ_{12}$ can be measured with an uncertainty of 2% (6%) at 1$σ$ (3$σ$) in a reactor experiment with $L \sim60 $ km, statistics of $\sim$60 GWkTy and systematic error of 2%. For the same statistics, the increase of the systematic error from 2% to 5% leads to an increase in the uncertainty in $\sin^2θ_{12}$ from 6% to 9% at 3$σ$. The inclusion of the $\sin^2θ_{13}$ uncertainty in the analysis changes the error on $\sin^2θ_{12}$ to 3% (9%). The effect of $\sin^2θ_{13}$ uncertainty on the $\sin^2θ_{12}$ measurement in both types of experiments is considerably smaller than naively expected. | |
| dc.description | Final version | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0410283 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0410283 | |
| dc.identifier | Phys.Rev.D72:033013,2005 | |
| dc.identifier | doi:10.1103/PhysRevD.72.033013 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/197343 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Experiment | |
| dc.subject | Nuclear Experiment | |
| dc.title | High Precision Measurements of $θ_{\odot}$ in Solar and Reactor Neutrino Experiments | |
| dc.type | text |