MESA
The MAGIX experiment is a versatile fixed target experiment, designed to perform a rich physics program including high luminosity searches for rare events and precision measurement of nuclear observables in the range between a few MeV and about 100 MeV, exploiting the intense electron beam of the MESA accelerator. The relatively low beam energy limits the energy of the scattered particle and the whole system must be optimized to limit the interaction of the secondary particle before their detection. ...
The P2 collaboration at the new electron accelerator MESA aims for precise measurements of the parity-violating asymmetry in the scattering of polarized electrons off unpolarized nuclei. Date taken with a high-power liquid hydrogen target will allow for a precise determination of the weak mixing angle, one of the fundamental paramters of the Standard Model of elementary particle physics. Another planned measurement concerns the neutron skin of lead, which is directly connected to the structure of neutron stars. ...
MAMI
The physical program of the A1 collaboration with its 50 members from 20 countries is focused on hadron structure.
A photon incident on a nucleon couples to the nucleon electromagnetic current causing it to radiate mesons if the photon energy is sufficiently high.
The X1 collaboration develops at MAMI brilliant novel radiation sources, and explores their potential for applications.
External Experiments
The NA58 experiment, or COMPASS Common Muon and Proton Apparatus for Structure and Spectroscopy is a fixed-target particle physics experiment at the Super Proton Synchrotron, a particle accelerator at the European Organization for Nuclear Research CERN.
The PANDA Experiment will be one of the key experiments at the Facility for Antiproton and Ion Research FAIR which is under construction and currently being built on the area of the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany.
The BESIII experiment at the BEPC-II collider of the Institute of High Energy Physics of the Chinese Academy of Sciences in Beijing studies electron-positron collisions at center-of-mass energies between 2 and 5 GeV. ...
The Mu3e experiment at the Paul Scherrer Institute in Switzerland uses one of the most intense muon beams in the world to search for the lepton-flavour violating decay of a positive muon to an electron and two positrons ...
Completed Experiments
The atomic nucleus is a bound state of protons and neutrons so called nucleons. The A4 collaboration is investigating the structure of these nucleons.
The BaBar experiment is an international collaboration of more than 500 physicists and engineers studying the subatomic world at energies of approximately ten times the rest mass of a proton ~10 GeV. Its design was motivated by the investigation of CP violation. BaBar is located at the SLAC National Accelerator Laboratory, which is operated by Stanford University for the Department of Energy in California.