We present experimental results on b-hadron mass measurements and
b-meson oscillations based on integrated luminosity of 250 to 450 pb-1 of
p anti-p collisions at s**(1/2) = 1.98 TeV by the CDF and D0 collaborations at
the TeVatron. The masses of b-hadrons have been measured precisely by the
CDF collaboration in decays containing J/psi. A blind search of the decay
mode B+(c) --> J/psi pi++ resulted in a peak of 18.9 +/- 5.4 candidates at a
mass value of 6287.0 +/- 4.5 +/- 1.1 MeV/c2. A new limit has been set to
the decay B(d),s --> mu+ mu-. Both CDF and D0 collaborations are in the
position to put a limit on the frequency of the B+(c) oscillations. D0
reports Delta m_s > 5.0 ps-1.
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Updated: Tuesday, 2005 July 05 15:58:08 CDT automatically from input from Carol Picciolo