Speaker
Description
The value of leptonic CP violation phase $\delta_{CP}$ and neutrino mass hierarchy are two of the current major open problems in neutrino oscillation physics. The quest to find the former is spearheaded by various accelerator based long-baseline neutrino experiments sensitive to $\delta_{CP}$. It is known that hierarchy-$\delta_{CP}$ ambiguity can affect the measurement of both parameters, and experiments are usually designed to have baselines and energies to eliminate this ambiguity. It is known from studies of sub-GeV atmospheric neutrinos that $\delta_{CP}$ can be determined irrespective of neutrino mass ordering at these energies. Here we explore the possibility of obtaining hierarchy independent measurement of $\delta_{CP}$ with sub-GeV $\nu$ and $\bar{\nu}$ events in accelerator based long-baseline experiments. Event rates are studied as a function of the energy ($E_\ell$) and direction ($\cos\theta_\ell$) of the final state lepton produced during charged current $\nu$ and $\bar{\nu}$ interactions.