$R$-matrix calculations of electron collisions with lithium atom at low energies

$R$-matrix calculations of the electron collisions with lithium atom at energies below the $3s$ excitation threshold are presented. The ${}^1{S}^e$, ${}^3{S}^e$ and ${}^1{P}^o$ phase shifts calculated in the near-threshold energy range are in excellent agreement with previous theoretical studies. The threshold behavior of the ${}^3{P}^o$ phase shift is accurately analyzed along with the resonance located at the scattering energy $\sim 60$ meV. The phase shifts and cross sections calculated here show two resonances below the $3s$ threshold that have not been previously reported.