$V_0$ signals

The final $V_0$ invariant mass distributions from the considered minimum bias data set for all four wires are shown in Figures 6.16 and 6.17 (all above described cuts are applied).

Each invariant mass distribution is fitted with a Gaussian plus polynomial of second order. The obtained signals are summarized in table 6.2, the widths and the peak positions in table 6.3.

Table 6.2: $V_0$ yield used in the analysis, based on runs taken in 2002.

Wire	Inner II	Inner I	Below I	Below II
Material	Carbon	Tungsten	Carbon	Titanium
N(events)	17,514,469	9,969,385	14,414,486	10,222,072
N($K^0_S$)	395,319. $\pm$ 880.	299,590. $\pm$ 773.	268,594. $\pm$ 817.	264,586. $\pm$ 721.
N($\Lambda$)	82,830. $\pm$ 453.	70,139. $\pm$ 338.	56,832. $\pm$ 350.	59,759. $\pm$ 360.
N( $\bar \Lambda$)	39,660. $\pm$ 559.	34,450. $\pm$ 343.	27,535. $\pm$ 277.	27,827. $\pm$ 291.

Table 6.3: Widths and peak positions of $V_0$s obtained from the signal spectrums fits (signal spectrums are shown in table 6.2).

Wire	$\sigma_{K^0_S}$, MeV	$M_{K^0_S}$, MeV	$\sigma_{\Lambda}$, MeV	$M_{\Lambda}$, MeV	$\sigma_{\bar \Lambda}$, MeV	$M_{\bar \Lambda}$, MeV
Inner II	5.$\pm$0.01	497.14$\pm$0.01	1.8$\pm$0.01	1115.43$\pm$0.01	1.82$\pm$0.03	1115.7$\pm$0.06
Inner I	5.06$\pm$0.01	497.28$\pm$0.01	1.83$\pm$0.01	1115.61$\pm$0.01	1.82$\pm$0.02	1115.6$\pm$0.01
Below I	5.01$\pm$0.01	497.24$\pm$0.01	1.79$\pm$0.01	1115.63$\pm$0.1	1.77$\pm$0.02	1115.6$\pm$0.01
Below II	5.04$\pm$0.01	497.24$\pm$0.01	1.8$\pm$0.01	1115.62$\pm$0.01	1.81$\pm$0.02	1115.5$\pm$0.01

Figure 6.16: $V_0$ signals found in the 2002/2003 minimum bias data set. From the top to the bottom: invariant mass distributions for $K^0_S$, $\Lambda$ and $\bar \Lambda$ candidates for runs taken Inner I and Inner II wires.

Figure 6.17: $V_0$ signals found in the 2002/2003 minimum bias data set. From the top to the bottom: invariant mass distributions for $K^0_S$, $\Lambda$ and $\bar \Lambda$ candidates for runs taken Below I and Below II wires.