electron mass

Hi roottalk,
I use TParticlePDG's extracted from TDatabasePDG to determine particle quantities,
and I've found that the mass of the electron has only two significant digits:

root[0] TParticlePDG* part = TDatabasePDG::Instance()->GetParticle(11);
root[1] double mass = part->Mass();
root[2] cout << mass << endl;

On the other hand, Geant3 stores the electron mass as 0.00051099906 Why is there the lack of precision in the TParticlePDG value? Can this be changed?
I'm using root v5.10/00d on linux.
Thanks,
-Sue Received on Fri May 26 2006 - 04:12:48 MEST