Paper

Proceedings of a poster shown at 14th Pisa Meeting on Advanced Detectors, 27 May - 2 Jun 2018,

\panda\ at FAIR will address the physics of strangeness in nuclei by several novel and unique measurements. These studies are only made possible by the
one-of-a-kind combination of the stored antiproton beam at FAIR and the modular \panda\ detector which will be complemented by a germanium detector array. The latter was made available by a cooperation with the NUSTAR collaboration.
\begin{itemize}
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\panda\ also offers the unique possibility to search for X-rays from very heavy hyperatoms such as e.g. $\Xi^-$-$^{208}$Pb. This will complement experiments at J-PARC which attempt to measure X-rays in light and (possibly) medium-heavy nuclei by the J-PARC E03 and E07 experiments. The measurement at \panda\ will allow to constrain the real and imaginary potential of $\Xi^-$ hyperons in the neutron skin
of the lead nucleus.
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\panda\ will extend the studies on double hypernuclei by performing for the first time high resolution $\gamma$-spectroscopy of these nuclei. Thus, \Panda\ complements measurements of ground state masses of double hypernuclei in emulsions at J-PARC conducted by the E07 Collaboration \cite{E07-proposal,doi:10.1142/9789814618229_0025} or the production of excited resonant states in heavy ion reactions which may, for example, be explored in future by the CBM Collaboration. Together, these measurements will provide a as yet unrivaled information on the structure of double $\Lambda\Lambda$ hypernuclei.

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Furthermore, the exclusive production of hyperon-antihyperon pairs close to their production threshold in $\Pap$ - nucleus collisions offers a unique and hitherto unexplored opportunity to elucidate the behaviour of antihyperons in cold nuclei which is intimately related to the short-range part of the baryonic interaction.
\end{itemize}

In all these studies, the production of low momentum {\PagL} within nuclei or slow $\Xi^-$ hyperons which can eventually be stopped in a secondary target material play an essential role.

The Barrel DIRC of the PANDA experiment at FAIR will cleanly
separate pions from kaons for the physics program of PANDA. Innovative solutions
for key components of the detector sitting in the strong magnetic eld of the compact
PANDA target spectrometer as well as two reconstruction methods were developed
in an extensive prototype program. The technical design and present results from
the test beam campaigns at the CERN PS in 2017 and 2018 are discussed.

The PANDA experiment at the future Facility for Antiproton and Ion Research (FAIR) will address
fundamental questions of hadron physics with unprecedented precision.
To reach this goal excellent Particle Identification (PID) is essential over a large range of particle momenta and solid angles.
Most of the phase space will be covered by two innovative DIRC (Detection of Internally Reflected Cherenkov light) detectors.
The Endcap Disc DIRC and Barrel DIRC will cover the polar angle range from 5 to 22$^\circ$ and 22 to 140$^\circ$, respectively.
Both detectors rely on high precision optical components, lifetime-enhanced Microchannel Plate PMTs (MCP-PMTs), and fast readout electronics.

The DIRC detectors of the PANDA experiment at FAIR will use multi-anode MCP-PMTs as photon sensors. After long and extensive R&D work
the performance parameters of the recent 2'' MCP-PMT models are converging towards the required values. The lifetime of most ALD-coated
MCP-PMTs is well surpassing the DIRC requirements with the best tube currently reaching >22 C/cm2 without aging. The performance of the most advanced MCP-PMTs from PHOTONIS and Hamamatsu fulfill basically all requirements with a highlight being the high DQE of almost 30% for the PHOTONIS 9002108. The improvements of the latest MCP-PMT models compared to former tubes are emphasized in this paper. In addition, some performance features of a recently developed 2'' MCP-PMT by Photek Ltd are presented and discussed.

The PANDA experiment will be one of the pillars of the new Facility for Antiproton and Ion Research (FAIR), which is currently under construction in Darmstadt, Germany. PANDA will be a fixed-target experiment which will allow the study of non-perturbative phenomena of the strong interaction. These will be probed in antiproton-proton collisions in the momentum range of 1.5 - 15 GeV/c. Within the PANDA physics program, strangeness production will be addressed through pbar p - > Ybar Y processes. Measurements of the pbar p-> Sigmabar Lambda channel for its comparison with the existing data of the Lambdabar Lambda channel are highly encouraged to study the role of isospin symmetry in hadron production dynamics. This work consists on a simulation study focusing on the feasibility of measuring the pbar p -> Sigmabar Lambda channel at PANDA.

d.o.i.: 10.1088/1748-0221/13/01/c01043

d.o.i.: 10.1109/NSSMIC.2017.8533084

The PANDA (anti-Proton ANnihiliation at DArmstadt) experiment will be one
of the four flagship experiments at the new international accelerator complex
FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany.
PANDA will address fundamental questions of hadron physics and quantum
chromodynamics using high-intensity cooled antiproton beams with momenta
between 1.5 and 15 GeV/c and a design luminosity of up to 2×10^32 cm−2 s−1.
Excellent particle identification (PID) is crucial to the success
of the PANDA physics program. Hadronic PID in the barrel region of the
target spectrometer will be performed by a fast and compact Cherenkov
counter using the detection of internally reflected Cherenkov light (DIRC)
technology. It is designed to cover the polar angle range from 22° to 140° and
will provide at least 3 standard deviations (s.d.) π/K separation up to
3.5 GeV/c, matching the expected upper limit of the final state kaon
momentum distribution from simulation.
This documents describes the technical design and the expected performance
of the PANDA Barrel DIRC detector. The design is based on the successful
BaBar DIRC with several key improvements.
The performance and system cost were optimized in detailed detector
simulations and validated with full system prototypes using particle
beams at GSI and CERN. The final design meets or exceeds the PID goal of
clean π/K separation with at least 3 s.d. over the entire phase space of charged
kaons in the Barrel DIRC.