HADES

Collaboration

High Acceptance Di-Electron Spectrometer

HADES 		C+C 2A GeV


Experimental Summary

The investigation of hadron properties inside nuclear matter at normal and high densities and temperatures is one of the main goals of current nuclear physics studies. Hadron induced reactions on heavy nuclei (e.g. Au, Pb) are the proper tool to probe particle properties in long-living ground state nuclear matter. Heavy ion collisions at energies of 1-2 AGeV can be used to create a reaction region of increased density for as long as 10 fm/c. Under these conditions, considerable modifications of basic hadron properties (masses, decay widths, etc.) are expected and probably can be verified for the first time experimentally by high resolution lepton pair decay measurements.
In order to investigate this phenomenon, the electron-positron pair spectrometer HADES was set up, and is in operation, at GSI by an international collaboration of 17 institutions from 9 European countries.

In the context of HADES@FAIR, an upgrade program* has been started with the following projects:
  • A forward wall (FW) for measurements of spectators and reaction planes.
  • A redesign of the data aquisition system to handle central Au+Au collisions at 8AGeV with a primary rate of 20 kHz, based on a Trigger and Readout Board (TRB)
  • A high-granularity Restitive Plate Chamber (RPC) to replace the TOFino at lower polar angles < 45°
*) supported by the EU (construction of new infrastructure), the BMBF and the Helmholtz International Center for FAIR

Pluto++
A Monte Carlo simulation tool for hadronic physics

Who was HADES?
HADES, Greek God of the Underworld

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Last change on Feb 03, 2011
Ingo Fröhlich