Particle Physics Seminar

"The Discovery of Sigma_b"

Presented by Petar Maksimovic, The John Hopkins University

Thursday, December 7, 2006, 3:00 pm — Small Seminar Room, Bldg. 510

In recent months, the Tevatron reached a significant milestone and delivered over 1fb-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 Lambda_b's. Using this sample, we observe four new Lambda_b pi+/- resononances, consistent with the hypothesis of
the lowest-lying Sigma_b(*) baryon states.

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