  In this work, we first analyze the correlations among different nuclear
matter parameters which are obtained by the 119 effective Skyrme interaction
sets. The values of the correlation coefficients illustrate that the magnitude
of the effective mass splitting is crucial for the tight constraints of the
symmetry energy via HICs. Thus, the main object of this work is to investigate
the impacts of the effective mass splitting on the heavy ion collisions
observables. The $^{86}$Kr+$^{208}$Pb system at the beam energy ranging from
25A MeV to 200A MeV are simulated within the framework of the improved quantum
molecular dynamics model (ImQMD-Sky) for this goal. Our calculations show that
the slopes of the spectra of $\ln$[Y(n)/Y(p)] and $\ln$[Y(t)/Y($^3$He)], which
are the logarithms of the neutron to proton yield ratios and triton to Helium-3
yield ratios, are directly related to the effective mass splitting and can be
used to probe the effective mass splitting.
