Search

We present the current status of the rare decay searches of B ( s ) 0 → μ + μ − , B → μ + μ − h , D + → π + μ + μ − and B ( s ) 0 → h + h ′ − at the Tevatron Collider. We also report about the latest results on CP Violation for B 0 and B s 0 decay modes into pairs of charmless charged hadrons (pions and kaons).

Searches for the Standard Model Higgs boson at the Tevatron are reviewed. The CDF and DO experiments have now analysed datasets corresponding to an integrated luminosity of approximately 1 fb −1 , with searches in different Higgs production and decay modes giving sensitivity over a range of possible Higgs masses. These different analyses and current limits on Higgs production at the Tevatron are described, along with the prospects for ongoing searches based on larger datasets.

Recent results on heavy flavor production from the CDF and DO experiments at the Tevatron are reported, using up to 1 fb −1 of accumulated luminosity per experiment. The first observation of resonant Λ b 0 π states, consistent with the lowest-lying charged Σ b states, is announced. Measurements are made of the B hadron relative fragmentation fractions and production cross sections of the B+ and ϒ ( 1 S ) . An upper limit for the production cross section of η b → J / ψ J / ψ is also set.

We present recent results on B s 0 lifetime difference obtained from the analysis of data collected at the Tevatron Collider Run II by the CDF and DO Collaborations during the period 2002 – 2004, corresponding to 260–450 pb −1 .

We report Tevatron results on the B c − meson in Run II. The B c − meson has been observed in semileptonic decays, B c − → J / ψ l − ν X , by both the CDF and DO collaborations at a significance greater than 5 σ . For DO, the candidate B c − → J / ψ μ − X events are used to extract measurements of the mass and lifetime of the B c − meson. For CDF, the B c − → J / ψ l − ν X observations have resulted in measurements of the relative production times branching ratio with respect to B − → J / ψ K − decays and a precise determination of the lifetime of the B c − : c τ ( B c − ) = 0.474 −0.066 +0.073 ± 0.033 ps . Also for CDF, an observation of B c − → J / ψ π − decays at a significance exceeding 6 σ results in a precise determination of the mass of the B c − : M ( B c − ) = 6275.2 ± 4.3 ± 2.3 MeV / c 2 .