Abstract:
The recent observation of collider neutrinos by the FASER collaboration
highlights the potential the forward direction at the LHC has for neutrino
physics. In the HL-LHC era, we expect a significant amount of neutrinos in the
forward direction, opening the way for precision studies using collider neutrinos
at the proposed Forward Physics Facility (FPF). In this talk, I will present some
phenomenological studies in this direction. i) The electromagnetic properties of
neutrinos (magnetic moments, milli-charge, charge radius) have attracted signif-
icant interest recently. We make use of the enhanced neutrino flux expected in
the HL-LHC era along with the sophisticated detectors at the FPF to constrain
these properties, as well as the weak mixing angle. ii) If a new sterile state
exists that couple to SM neutrino via the photon through a dipole portal, then
it will also leave a signature in these detectors via up-scattering. This allows
us to constrain the magnetic dipole moment interaction between SM neutrinos
and this new sterile state. Furthermore, these neutrino detectors can also be
used to probe some light dark matter models. We present some results in this
direction.