Speaker
Description
In this study, we perform a comprehensive analysis of the perturbed TBM scenario for deriving the numerical constraints on Leptonic CP phases from the parameter space, allowed by the neutrino mixing angle data. We investigate the corrections of the types $U_{ij}^{l}\cdot U_{TBM}\cdot U_{kl}^r$, $U_{ij}^{l}\cdot U_{kl}^r \cdot U_{TBM}$, and $U_{TBM} \cdot U_{ij}^{l}\cdot U_{kl}^r$ for normal and inverted hierarchy scenario. Here $U_{TBM}$ is tribimaximal mixing matrix and $U$ is a 2 dimensional unitary correction matrix that can be parametrized by a mixing angle and a phase parameter. This study investigates all the possible cases that are consistent with the neutrino mixing data in the vanishing rotation angle limit. We find the characteristics features of viable parameter space and evaluate the bounds on CP violating phases. We show that the allowed regions are tightly constrained by neutrinoless double beta decay and cosmological constraints.
Acknowledgements: The work of SKG has been supported by SERB, DST, India through grant TAR/2023/000116. The authors acknowledges Manipal Centre for Natural Sciences,Centre of Excellence, Manipal Academy of Higher Education (MAHE) for facilities and support.
| Field of contribution | Phenomenology |
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