Exploring Leptonic CP Violation by Reactor and Neutrino Superbeam Experiments
نویسنده
چکیده
Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan Abstract We point out the possibility that reactor measurement of θ13, when combined with high-statistics νe appearance accelerator experiments, can detect leptonic CP violation. Our proposal is based on a careful statistical analysis under reasonable assumptions on systematic errors, assuming 2 years running of the neutrino mode J-PARC → Hyper-Kamiokande experiment and a few years running of a reactor experiment with 100ton detectors at the Kashiwazaki-Kariwa nuclear power plant. We show that the method can be arranged to be insensitive to the intrinsic parameter degeneracy but is affected by the one due to unknown sign of ∆m31.
منابع مشابه
Exploring Leptonic Cp Violation with Combined Analysis of Reactor and Neutrino Superbeam Experiments
Observing the leptonic CP-violation is one of aims in future experiments of the neutrino oscillation. It can be achieved by comparing oscillation probabilities with neutrino beam and its antiparticle one; For example, T2K experiment will measure P (νμ → νe) and P (νμ → νe) precisely in its phase II. Such a comparison is important obviously because it gives a direct observation of the leptonic C...
متن کاملLooking for Leptonic Cp Violation with Neutrinos
I discuss some theoretical aspects of how to observe leptonic CP violation. It is divided into two parts, one for CP violation due to Majorana, and the other more conventional leptonic Kobayashi-Maskawa (KM) phases. In the first part, I estimate the effect of Majorana phase to observable of neutrinoless double beta decay experiments by paying a careful attention to the definition of the atmosph...
متن کاملFrom parameter space constraints to the precision determination of the leptonic Dirac CP phase
We discuss the precision determination of the leptonic Dirac CP phase δCP in neutrino oscillation experiments, where we apply the concept of “CP coverage”. We demonstrate that this approach carries more information than a conventional CP violation measurement, since it also describes the exclusion of parameter regions. This will be very useful for next-generation long baseline experiments where...
متن کاملFirst hint for CP violation in neutrino oscillations from upcoming superbeam and reactor experiments
We compare the physics potential of the upcoming neutrino oscillation experiments Daya Bay, Double Chooz, NOνA, RENO, and T2K based on their anticipated nominal luminosities and schedules. After discussing the sensitivity to θ13 and the leading atmospheric parameters, we demonstrate that leptonic CP violation will hardly be measurable without upgrades of the T2K and NOνA proton drivers, even if...
متن کامل2 00 8 Constructing the Leptonic Unitarity Triangle
Following analogy of the ‘db’ triangle in the quark mixing case, we have explored the construction of the ‘ν2.ν3’ leptonic unitarity triangle using the MNS matrix obtained by Bjorken et al. through generalization of the tribimaximal scenario. In particular, for the Ue3 range 0.05− 0.15, the existence of leptonic unitarity triangle indicates a fairly good possibility of having non zero CP violat...
متن کامل