  We study chiral wave packets moving along the zero-line of a symmetry
breaking potential of vertical electric field in buckled silicene using an
atomistic tight-binding approach with initial conditions set by an analytical
solution of the Dirac equation. We demonstrate that the wave packet moves with
a constant untrembling velocity and with a presevered shape along the zero
line. Backscattering by the edge of the crystal is observed that appears with
the transition of the packet from $K$ to $K'$ valley or vice versa. We propose
a potential profile with branching of the flip line that splits the wave packet
and produces interference of the split parts that acts as a quantum ring. The
transition time exhibits Aharonov-Bohm oscillations in the external magnetic
field that are translated to conductance oscillations when the intervalley
scattering is present within the ring.
