values, $\omega_{\pm}\cong 1- 2v
n_{\pm}$ and $\omega_{ch}\cong 1- 2v n_{ch}$. Thus, the VDW suppression effects are seen at low collision energy for positively charged and all charged particles (Fig. 1 and 2), and are absent for negatively charged particles (Fig. 1, right).

At high collision energies (large $T$) one finds $n_-\cong n_+$ as seen from Fig. 2, right. For the hard-core radius $r=0.5$ fm, Fig. 1 shows the asymptotic values of 0.85 for the primordial and 0.83 for the final scaled variances $\omega_{\pm}$ in the VDW HG, instead of 1 and 1.1, respectively, in the ideal HG. Thus, one observes about 15% and 25% VDW excluded volume suppression for, respectively, the primordial and final values of $\omega_{\pm}$. The upper limit of the VDW suppression effects for the scaled variances is obtained at $n_{tot}\cong 1/v$ and is presented in Figs. 1-2. The approximate relations both at small density, $\omega_j\cong 1-2vn_j$, and high density, $\omega_j\cong 1
-n_j/n_{tot}$, demonstrate that VDW suppression of $j$th fluctuations is proportional to $j$th density in the HG. This explains why the VDW suppression for the primordial $\omega_{ch}$ seen in Fig. 2 is approximately the same as for $\omega_+$ at small collision energy and 2 times larger than 