1303.4332 (Ahmed Rashed et al.)

Tau neutrino as a probe of nonstandard interaction    [PDF]

Ahmed Rashed, Preet Sharma, Alakabha Datta

We study the $\Delta$-resonance and deep inelastic scattering contributions in the tau-neutrino nucleon scattering $\nu_{\tau}+ N \rightarrow \tau^- + X$ and $\bar{\nu}_{\tau}+ N \rightarrow \tau^+ + X$ in the presence of a charged Higgs and a $W'$ gauge boson. The new physics effects to the quasielastic process have been discussed in a previous work. The extractions of the atmospheric and reactor mixing angles $\theta_{23}$ and $\theta_{13}$, respectively, rely on the standard model cross sections for the above processes. Corrections to the cross sections from the charged Higgs and $W'$ contributions modify the measured mixing angles. We include form factor effects in the new physics calculations and find the deviations of the mixing angles. If the reactor neutrino experiments are designed to measure the tau antineutrino appearance, the new physics effects to $\bar{\nu}_{\tau}+ N \rightarrow \tau^+ + X$ can impact the extraction of $\theta_{13}$. Finally, we investigate the new physics effects on the polarization of the $\tau^\mp$ leptons produced in $\nu_\tau (\bar{\nu}_\tau)$ nucleon scattering.

View original: http://arxiv.org/abs/1303.4332