  The recent net-proton fluctuation results of the STAR (Solenoidal Tracker At
RHIC) experiment from beam energy scan (BES) program at the BNL Relativistic
Heavy Ion Collider (RHIC) have drawn much attention to exploring the QCD
critical point and the nature of deconfinement phase transition. There has been
much speculation that the non-monotonic behavior of $\kappa\sigma^{2}$ of the
produced protons around $\sqrt{s_{\rm NN}}$ = 19.6 GeV in the STAR results may
be due to the existence of QCD critical point. However, the experimentally
measured proton distributions contain protons from heavy resonance decays, from
baryon stopping and from direct production processes. These proton
distributions are used to estimate the net-proton number fluctuation. Because
it is difficult to disentangle the protons from the above-mentioned sources, it
is better to devise a method which will account for the directly produced
baryons (protons) to study the dynamical fluctuation at different
center-of-mass energies. This is because, it is assumed that any associated
criticality in the system could affect the particle production mechanism and
hence the dynamical fluctuation in various conserved numbers. In the present
work, we demonstrate a method to estimate the number of stopped protons at RHIC
BES energies for central $0-5\%$ \auau collisions within STAR acceptance and
discuss its implications on the net-proton fluctuation results.
