  This study leads to the investigation of the non-equilibrium electron
relaxation in the normal state of iron pnictides. Here we consider the
relaxation of electrons due to their coupling with magnons and phonons in the
metallic state of iron pnictides using the memory function approach. In the
present model, electrons live at a higher temperature than that of the phonon
and magnon baths, mimicking a non-equilibrium steady state situation. Further
we analyze theoretically the generalized Drude scattering rate within the
framework of Two Temperature Model and study the full frequency and temperature
behavior for it. In zero frequency regime, the rate of electron-magnon
scattering and electron-phonon scattering shows a linear temperature dependence
at higher temperature values greater than Bloch-Gr\"{u}neisen temperature.
Whereas at lower temperature values, $T\ll\Theta_{BG}$, corresponding
scattering rates follow the temperature behavior as ($1/\tau_{e-p} \varpropto
T^3$) and ($1/\tau_{e-m} \varpropto T^{3/2}$), respectively. In the AC regime,
we compute that $1/\tau \propto \omega^2$ for $\omega\ll\omega_{BG}$ and for
the values greater than the Bloch-Gr\"{u}neisen frequency, it is
$\omega$-independent. Also, in lower frequency and zero temperature limit, we
have observed the different frequency scale of electron-magnon and
electron-phonon scattering i.e ($1/\tau \propto \omega^{3/2}$) and
($1/\tau\propto \omega^{3}$). These results can be viewed with the pump-probe
experimental setting for the normal state of iron pnictides.

Superconductivity;Strongly Correlated Electrons