Speaker
Description
Flavor-dependent long-range leptonic force mediated by an ultralight and neutral
gauge boson $Z'$ associated with $L_\mu -L_\tau$ symmetry constitutes a minimal
extension of the Standard Model. We study the physical consequences of such
long-range force in the oscillation of terrestrial neutrinos, particularly in $\nu_\mu$ survival channel. We show that the proposed atmospheric neutrino detector ICAL will be able to put tight constraints on such long-range force due to its capabilities of detecting neutrino and antineutrino separately with wide ranges of energies and baselines. The expected upper limit on the fine structure constant of this long-range force at $3\sigma$ is $2.82\times 10^{-51}$ using 500 kt$\cdot$yr exposure of ICAL. We also study the possible impact of the long-range force in the expected measurement of mass ordering at the ICAL in detail.
| First author | Amina Khatun |
|---|---|
| amina.burd@gmail.com | |
| Collaboration / Activity | INO, ICAL |
