2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37681We present the B physics results from the CDF and DØ experiments at the Tevatron Run II at Fermilab and their future prospect. This includes various B mass and lifetime measurements, B mixing, the confirmation of the discovery of the X particle, rare decays, CP violation and spectroscopy.4 pages, 2 figures, contribution to the proceedings for the XXXIXth Rencontres de Moriond (QCD and High Energy Hadronic Interactions) March 28th to April 4th, 2004, La Thuile, ItalyHigh Energy Physics - Experimenttext