ALEPH is a particle physics experiment installed at LEP, the large electron-positron collider at the CERN laboratory in Geneva/Switzerland. LEP produced its first collisions in July 1989 and since then, millions of events have been recorded by the ALEPH particle detector. Its purpose was to explore the Standard Model of particle physics and search for manifestations of new physics. 


The ALEPH experiment is a large collaboration of several hundred physicists and engineers from 32 universities and national laboratories from around the world.

Bit Preservation: 

“State of the art” bit preservation with regular scrubbing and migration to new media


2 copies on tape at CERN, an additional copy on disk (EOS) being setup.

Additional copies exist outside CERN (ALEPH, OPAL and partial copy for DELPHI)


Being revisited – to be “archived” in CERN Document Server for long-term preservation


To be published into CernVMFS

Use Cases: 

Continued analyses by former collaboration members


Primarily former collaboration


Analyses, publications and PhDs continue to be produced


Unique – until and unless certain FCC options are implemented


Minimal resources for “bit preservation” and storage


Dependency on CERNLIB (no longer maintained)


Expect to be able to analyse data (ALEPH, DELPHI, OPAL) until at least 2020. Until 2030 should be possible with < (<) 1FTE / experiment / year

Host Lab: 

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