High Energy Physics Seminars

In recent months, the Tevatron reached a significant milestone and delivered over one fb^-1 to both the D0 and CDF experiments. The large sample of data and a powerful displaced vertex trigger combine to give CDF the world’s largest sample of fully reconstructed Λ_b⁰s. Using this sample, we observe four new Λ_b⁰ π+/- resononances, consistent with the hypothesis of the lowest-lying Σ_b^{* baryon states.}