Register as User

If you decide to use ROOT please let us know by filling in the form below.

If you have difficulty sending your registration via the form, you can send e-mail to

To join the mailing list, do the following:

  • If you don't have a CERN account, create a light weight CERN account.
  • Add yourself to the roottalk mailing list, by clicking on the "Members" tab and then on the "Add me" button.
  • To remove yourself from the mailing list click on the "Remove me" button on the same above "Members" page.

The roottalk mailing list archives are also available.

To post messages on the roottalk mailing list send mail to:

but before doing so read the mailing list rules.

Please enter your name: 
        E-mail address: 
    Project/Experiment:  Alice     Atlas     CMS       LHC-B     Aleph
                         Delphi    L3        Opal      NA45      NA48
                         NA49      Nomad     WA98      Compass   CDF
                         D0        BRAHMS    PHENIX    Phobos    STAR
                         H1        Hera-B    Zeus      Finuda    Kloe
                         BaBar     Belle     Hades     Jefferson Lab
           Type of use:  High Energy/Nuclear Physics   Scientific
                         Commercial                    Private
               Privacy:  Keep registration private   May be shared

Briefly describe how you're planning to use ROOT.

This information will remain strictly private (if you've chosen so).
It will give us a better understanding of our user community so we can better focus our developments.