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Barnali Brahma

Publications and source records attributed to Barnali Brahma.

2 recordsLinked to original sources
arXiv2023

Probing Dual NSI and CP Violation in DUNE and T2HK

The latest results from the long baseline neutrino experiments show a hint of non-zero CP violation in the neutrino sector. In this article, we study the CP violation effects in the upcoming long-baseline neutrino experiments DUNE and T2HK. Non-standard interactions can affect the cleaner determination of CP violation parameter. It has been argued that the NSI can help alleviate the tension between the recent $δ_{CP}$ measurements of NO$ν$A and T2K experiments. We consider here the dual NSI due to $ε_{eμ}$ and $ε_{eτ}$, arising simultaneously to see the effects in neutrino oscillation probabilities. Moreover, the CP asymmetry parameter $A_{CP}$ exhibits a clear distinction between normal and inverted mass orderings in the DUNE experiment.

hep-ph↗
arXiv2023

Discernible NSI Effects in Long-Baseline Neutrino Experiments

Neutrino oscillation in the matter could get affected by the sub-dominant, yet unknown, non-standard interactions. The upcoming long-baseline (LBL) neutrino experiments will be sensitive to these effects and can provide information on the unknown oscillation parameter values. In this article, we study the parameter degeneracies that can occur in DUNE, T2HK experiments, and a combination of both due to nonstandard interactions (NSI), arising simultaneously, from two different off-diagonal sectors, i.e., $e-μ$ and $e-τ$. We derive constraints on both the NSI sectors using the combined datasets of NO$ν$A and T2K. Our analysis reveals a significant impact that dual NSIs may have on the sensitivity of atmospheric mixing angle $θ_{23}$ in the normal ordering (NO) case. Furthermore, when non-standard interaction from the $e-μ$ and $e-τ$ sectors are included, we see significant changes in the probabilities for DUNE, T2HK, and as well as a combined analysis involving both. Moreover, the CP sensitivity gets affected significantly due to the presence of dual NSIs, and, in addition, the CP asymmetry also exhibits an appreciable difference.

hep-ph↗