Abstract
We examine the capabilities of the DUNE experiment in probing leptonic CP violation within the framework of theories with generalized CP symmetries characterized by the texture zeros of the corresponding CP transformation matrices. We investigate DUNE's potential to probe the two least known oscillation parameters, the atmospheric mixing angle $\theta_{23}$ and the Dirac CP-phase $\delta_{\rm CP}$. We fix theory-motivated benchmarks for ($ \sin^2\theta_{23}, \delta_{\rm CP} $) and take them as true values in our simulations. Assuming 3.5 years of neutrino running plus 3.5 years in the antineutrino mode, we show that in all cases DUNE can significantly constrain and in certain cases rule out the generalized CP texture zero patterns.
Highlights
The discovery of oscillations [1,2] provides a major milestone in the development of particle physics over the past few decades [3]
We examine the capabilities of the Deep Underground Neutrino Experiment (DUNE) experiment in probing leptonic CP violation within the framework of theories with generalized CP symmetries characterized by the texture zeros of the corresponding CP transformation matrices
Since in this work we are mainly interested in the potential of DUNE to probe CP texture zeros, we will only focus on the implications on parameters relevant to neutrino oscillations, namely, the three angles and the Dirac CP phase δCP
Summary
The discovery of oscillations [1,2] provides a major milestone in the development of particle physics over the past few decades [3]. Sphaleron processes can convert a preexisting lepton number, producing a net baryon number, a process called leptogenesis [6] This mechanism could, in principle, account for the observed matter to antimatter asymmetry of the Universe provided CP is violated in the lepton sector in an adequate manner. Rather than considering specific full-fledged neutrino theories from first principles, here we adopt a model-independent framework based on generalized CP symmetries. These are characterized by the pattern of texture zeros of the corresponding generalized CP transformation matrices [21].
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