Speaker
Description
The particle identification system ASHIPH (Aerogel, SHifter, PHotomultiplier) has been working in the KEDR experiment at VEPP-4M $e^{+}e^{-}$-collider (Budker INP, Novosibirsk) since 2014. The system consists of 160 aerogel cherenkov counters arranged in two layers and covers 96% of the solid angle. The volume of aerogel is 1000 liters, its refractive index is 1.05. For the photon detection we use the Micro Channel Plate (MCP) PMTs. $\pi$/K separation in the momentum range from 0.95 to 1.45 GeV/$c$ is better than 4$\sigma$. The status of the system is presented. The long-term stability of aerogel counters in the KEDR experiment is shown. A review of the use of ASHIPH system for perform physical analysis in the KEDR experiment is presented, such as measurements of the masses of neutral and charge $D$-mesons and measurement the branching fractions of $J/\psi$ meson decays to the final states $p\bar{p}$, $2(\pi^{+}\pi^{-})\pi^{0}$, $K^{+}K^{-}\pi^{+}\pi^{-}\pi^{0}$, $2(\pi^{+}\pi^{-})$ and $K^{+}K^{-}\pi^{+}\pi^{-}$.
