A Realization and Truncation of Yangian Algebra in the Generalized Hydrogen Atom with a U(1) Monopole

We establish an extended hydrogen atom associated with a U(1) monopole in which a realization of Yangian Y(sl(2)) is proposed and the energy spectrum is also given. By solving the RTT relation R(u-v)T(u) T(v)=T(v) T(u) R(u-v) for the truncation T⁽³⁾ = 0, the obtained model is shown to be related to the truncated Yangian.