Detector software

Within the FAIR phase-0 project, the use of FAIR equipment at
other facilities before the completion of the civil construction is envis-
aged. The PANDA EMC is a good candidate for FAIR phase-0, due
to the advanced state of its development. In particular, the backward
endcap (BWEC) of the PANDA EMC, which is developed and built at
HIM in Mainz, could be ready by 2020, three years before its foreseen
installation. Therefore, possible experiments at the MAMI electron
beam facility making use of the BWEC are under consideration.
One candidate is the measurement of the π electromagnetic transition
form factor via the electroproduction on a nuclear Coulomb field. To
select this channel, the momentum distribution of the π needs to be
measured by detecting the decay γ particles in an EMC.
Since the relevant γ s are emitted at forward angles, where high par-
ticle fluxes are expected, the affordable luminosity is limited by the
maximum event rate of the detector. Therefore, the total event rate at
different scattering angles with various targets need to be determined.
Monte Carlo simulations are ongoing and a beam test with a prototype
calorimeter was scheduled for January 2018 in order to address these
questions. The status of these feasibility studies will be presented.

The PANDA experiment, is a core project of the future Facility for
Antiproton and Ion Research (FAIR) at GSI in Darmstadt. It will investigate
antiproton proton annihilations on nucleons and nuclei with the aim to explore fundamental
questions in the nonperturbative regime of QCD as the origine of the hadron mass. The multi-purpose
detector is currently under construction. The intense and high quality anti-proton beam will span
the momentum range between 1.5 and 15 GeV/c. The detection of hadrons, leptons, and photons in the final states
will be possible with very high precision. A rich physics program as resonances in the charmonium and open charm region, electromagnetic form factors, hyper nuclear physics will be investigated. The worldwide collaboration gathers today more than 450 physicists from 60 institutions in 19 countries. The talk will give an overview of the PANDA experiment and of the most important aspects of the physics program.
It will focus on the topics that will be investigated as soon as the facility is operational.

PANDA Management Quarterly Report 17Q4

PANDA Management Quarterly Report 17Q2

PANDA Management Quarterly Report 17Q1

The $\overline{\text{P}}$ANDA experiment is a pillar of the Facility for Antiproton and Ion Research (FAIR) which is currently under construction in Darmstadt, Germany. $\overline{\text{P}}$ANDA will investigate open questions in hadron physics by studying the collision of a fixed target with antiprotons in the momentum range from $1.5\,\text{GeV}/c$ to $15\,\text{GeV}/c$.

The $\overline{\text{P}}$ANDA detector consists of 30 subsystems which all need several kinds of services (like high voltage, low voltage, cooling, gas etc.) to operate properly. The purpose of a detector control system (DCS) is to monitor and control all these devices, report to the crew on shift and provide insight to subsystem experts to solve any occuring problem.

The control software for the individual subsystem is created by the $\overline{\text{P}}$ANDA members responsible for said subsystem, but in addition components like the operator interfaces, alarm system and archiving system are managed by a dedicated Controls Group within the $\overline{\text{P}}$ANDA Collaboration.

This talk explores the challenges in bringing together heterogenic software components for a variety of different tasks and illustrates the way the $\overline{\text{P}}$ANDA Collaboration is solving these challenges.

This project is supported by the BMBF.

In this paper different propagation methods for the extraploation of tracks from the STT to the EMC are studied and a new, momentum and particle type dependent quality cut was introduced to improve the completness and the purity of charged candidates.

The PANDA experiment, currently under construction at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany, addresses fundamental questions in hadron and nuclear physics via interactions of antiprotons with nuclei. It will be installed at the High Energy Storage Ring (HESR), which will provide an antiproton beam with a momentum range of 1.5 - 15 GeV/c and enables a high average interaction rate on the fixed target of 2 x 10^7 events/s. The PANDA experiment adopts a continuous data acquisition and the expected data rate transmitted to a high-bandwidth computing network will be in the order of 200 GB/s. However, in order to select very rare physics processes, an indiscriminate hardware trigger does not suffice. Instead, an online software-based data selection system will be used to achieve a data reduction of a factor 100 - 1000. This demands a highly advanced online analysis due to the high interaction rate which has to deal also with overlapping event data. Scalability and parallelization of the reconstruction algorithms are therefore a particular focus in the development process. An simulation framework called PandaRoot is used to develop and evaluate different reconstruction algorithms for event building, tracking and particle identification as well as to further optimize the detector performance. An overview about PandaRoot and the requirements on the event reconstruction algorithms is presented and algorithms for the event time reconstruction currently under development are discussed.

The upcoming PANDA (anti-Proton ANnihilation at DArmstadt) experiment at the future FAIR (Facility for Anti-proton and Ion Research) offers unique possibilities for performing hyperon physics experiments. The almost full 4pi coverage of the detector will offer the possibility of reconstructing both hyperon and antihyperon which will be created together in proton-antiproton collisions. Due to their relatively long-lived nature, the displaced decay vertices of hyperons impose a particular challenge on the track reconstruction.

This talk will address the hyperon channels of special interest for PANDA, what makes them special and why these are interesting to study. The interesting hyperons are the single strange Lambda, the doubly strange Xi^- and the triple strange Omega^- with the production channels p-antip->Lambda-antiLambda, p-antip->Xi^-Xi^+ and p-antip->Omega^-Omega^+. The challenges regarding the tracking and reconstruction of hyperons at PANDA will also be discussed.