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Evolution of Mass-Mixing Parameters in Matter with Neutrino NSIs

Not scheduled


Sudipta Das (Institute of Physics, Bhubaneswar)


We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of all possible lepton-flavour-conserving and lepton-flavour-violating non-standard interactions (NSIs) of the neutrino. We derive simple approximate analytical expressions for the mass-mixing parameters in matter in presence of NSIs. We observe that only the NSIs in 2-3 block($\varepsilon_{\mu\mu}, \varepsilon_{\tau\tau}$,and $\varepsilon_{\mu\tau}$) affect the running of $\theta_{23}$. Though all the NSIs influence the evolution of $\theta_{13}$, but, $\varepsilon_{e\mu}$ and $\varepsilon_{e\tau}$ have prominent impact at the energies relevant for DUNE. We demonstrate the utility of our approach in addressing several important features related to neutrino oscillation such as: a) estimating the resonance energy in presence of NSIs when $\theta_{13}$ in matter becomes maximal, b) figuring out the required baseline length and neutrino energies to have maximal matter effect in $\nu_{\mu}$ to $\nu_{e}$ transition, and c) unraveling interesting degeneracies between $\theta_{23}$ and NSI parameters.


Analytical expressions for running of oscillation parameters in matter with NSIs & their utilities

Primary author

Sudipta Das (Institute of Physics, Bhubaneswar)


Mehedi Masud (IFIC, Valencia) Mr Pragyanprasu Swain (Institute of Physics,Bhubaneswar) Mr Sanjib Kumar Agarwalla (Institute of Physics, Bhubaneswar, Homi Bhabha National Institute, and International Centre for Theoretical Physics)

Presentation Materials