CERN Accelerating science

The decay probability as a function of the path length for the ground-state hyperons with $c\tau$=1.

The PANDA detector with the subdetectors labelled. The antiproton beam enters from the left and the cluster jets or pellet target enters from the top.

Schematic layout of the MVD, STT and GEM stations. The barrel and disc parts of the MVD are indicated by black lines. All numbers represent the fiducial volume and are given in cm.

Cross section of the PANDA Straw Tube Tracker (STT).

Absolute momentum \textit{versus} the lab polar angle distributions for particles from the $\bar{p}p\rightarrow\bar{\Omega}^+\Omega^-$ reaction and its subsequent decays at beam momenta of 5.0, 7.0 and 15 GeV/\textit{c}.

Absolute momentum \textit{versus} the lab polar angle distributions for particles from the $\bar{p}p\rightarrow\bar{\Omega}^+\Omega^-$ reaction and its subsequent decays at beam momenta of 5.0, 7.0 and 15 GeV/\textit{c}.

Absolute momentum \textit{versus} the lab polar angle distributions for particles from the $\bar{p}p\rightarrow\bar{\Omega}^+\Omega^-$ reaction and its subsequent decays at beam momenta of 5.0, 7.0 and 15 GeV/\textit{c}.

Transverse \textit{versus} longitudinal momentum distributions for particles from the $\bar{p}p\rightarrow\bar{\Omega}^+\Omega^-$ reaction and its subsequent decays.

Transverse \textit{versus} longitudinal momentum distributions for particles from the $\bar{p}p\rightarrow\bar{\Omega}^+\Omega^-$ reaction and its subsequent decays.

Transverse \textit{versus} longitudinal momentum distributions for particles from the $\bar{p}p\rightarrow\bar{\Omega}^+\Omega^-$ reaction and its subsequent decays.

Decay vertex positions of $\Omega^-$ and $\bar{\Omega}^+$ (left) and the $\Lambda$ and $\bar{\Lambda}$ (right). The top panels show the distributions at a beam momentum of 5.0 GeV/\textit{c}, middle panels at 7.0 GeV/\textit{c} and the bottom panel at 15.0 GeV/\textit{c}. The inner rectangle mark the boundaries of the MVD and the outer rectangle mark the boundaries of the STT. The GEM planes are marked with vertical lines.

Decay vertex positions of $\Omega^-$ and $\bar{\Omega}^+$ (left) and the $\Lambda$ and $\bar{\Lambda}$ (right). The top panels show the distributions at a beam momentum of 5.0 GeV/\textit{c}, middle panels at 7.0 GeV/\textit{c} and the bottom panel at 15.0 GeV/\textit{c}. The inner rectangle mark the boundaries of the MVD and the outer rectangle mark the boundaries of the STT. The GEM planes are marked with vertical lines.

Decay vertex positions of $\Omega^-$ and $\bar{\Omega}^+$ (left) and the $\Lambda$ and $\bar{\Lambda}$ (right). The top panels show the distributions at a beam momentum of 5.0 GeV/\textit{c}, middle panels at 7.0 GeV/\textit{c} and the bottom panel at 15.0 GeV/\textit{c}. The inner rectangle mark the boundaries of the MVD and the outer rectangle mark the boundaries of the STT. The GEM planes are marked with vertical lines.

Decay vertex positions of $\Omega^-$ and $\bar{\Omega}^+$ (left) and the $\Lambda$ and $\bar{\Lambda}$ (right). The top panels show the distributions at a beam momentum of 5.0 GeV/\textit{c}, middle panels at 7.0 GeV/\textit{c} and the bottom panel at 15.0 GeV/\textit{c}. The inner rectangle mark the boundaries of the MVD and the outer rectangle mark the boundaries of the STT. The GEM planes are marked with vertical lines.

Decay vertex positions of $\Omega^-$ and $\bar{\Omega}^+$ (left) and the $\Lambda$ and $\bar{\Lambda}$ (right). The top panels show the distributions at a beam momentum of 5.0 GeV/\textit{c}, middle panels at 7.0 GeV/\textit{c} and the bottom panel at 15.0 GeV/\textit{c}. The inner rectangle mark the boundaries of the MVD and the outer rectangle mark the boundaries of the STT. The GEM planes are marked with vertical lines.

Decay vertex positions of $\Omega^-$ and $\bar{\Omega}^+$ (left) and the $\Lambda$ and $\bar{\Lambda}$ (right). The top panels show the distributions at a beam momentum of 5.0 GeV/\textit{c}, middle panels at 7.0 GeV/\textit{c} and the bottom panel at 15.0 GeV/\textit{c}. The inner rectangle mark the boundaries of the MVD and the outer rectangle mark the boundaries of the STT. The GEM planes are marked with vertical lines.

The number of reconstructable TS tracks per event for 50,000 events at beam momenta 5.0 GeV/\textit{c} (left panel), 7.0 GeV/\textit{c} (middle panel) and 15.0 GeV/\textit{c} (right panel).

The number of reconstructable TS tracks per event for 50,000 events at beam momenta 5.0 GeV/\textit{c} (left panel), 7.0 GeV/\textit{c} (middle panel) and 15.0 GeV/\textit{c} (right panel).

The number of reconstructable TS tracks per event for 50,000 events at beam momenta 5.0 GeV/\textit{c} (left panel), 7.0 GeV/\textit{c} (middle panel) and 15.0 GeV/\textit{c} (right panel).

Distribution of the number of STT hits from $\pi^-$ from the $\bar{\Omega}^+\Omega^-, \Omega^- \to \Lambda K^-, \Lambda \to p \pi^-$ process at 5.0, 7.0 and 15.0 GeV/$c$. The number of straw tube layers in the STT is 27 and marked with a vertical line.

Distribution of the number of STT hits from $\pi^-$ from the $\bar{\Omega}^+\Omega^-, \Omega^- \to \Lambda K^-, \Lambda \to p \pi^-$ process at 5.0, 7.0 and 15.0 GeV/$c$. The number of straw tube layers in the STT is 27 and marked with a vertical line.

Distribution of the number of STT hits from $\pi^-$ from the $\bar{\Omega}^+\Omega^-, \Omega^- \to \Lambda K^-, \Lambda \to p \pi^-$ process at 5.0, 7.0 and 15.0 GeV/$c$. The number of straw tube layers in the STT is 27 and marked with a vertical line.

Distribution of the number of STT hits from $K^-$ from the $\bar{\Omega}^+\Omega^-, \Omega^- \to \Lambda K^-$ process at 5.0, 7.0 and 15.0 GeV/$c$. The number of straw tube layers in the STT is 27 and marked with a vertical line.

Distribution of the number of STT hits from $K^-$ from the $\bar{\Omega}^+\Omega^-, \Omega^- \to \Lambda K^-$ process at 5.0, 7.0 and 15.0 GeV/$c$. The number of straw tube layers in the STT is 27 and marked with a vertical line.

Distribution of the number of STT hits from $K^-$ from the $\bar{\Omega}^+\Omega^-, \Omega^- \to \Lambda K^-$ process at 5.0, 7.0 and 15.0 GeV/$c$. The number of straw tube layers in the STT is 27 and marked with a vertical line.

Event reconstruction efficiency of the $\bar{p}p \to \bar{\Omega}^+\Omega^-$ reaction and its subsequent decays.