Session J2: The State of Heavy Flavor

30 Years of the Cornell Electron Storage Ring

The Cornell Electron Storage Ring (CESR) began operation in 1979 with two experiments, CLEO and CUSB. Initially, CLEO and CUSB saw the $\Upsilon(1S)$ and $\Upsilon(2S)$ states that were discovered at Fermilab and confirmed at DESY, confirmed the $\Upsilon(3S)$ state, and demonstrated that it was narrow. Then the two collaborations discovered the $\Upsilon(4S)$ and the found that it was significantly broader than the lower $\Upsilon$ states. This observation and CLEO's discovery of enhanced lepton production at the $\Upsilon(4S)$ demonstrated that a new quark-antiquark threshold had been crossed and suggested that $\Upsilon(4S) \to B \bar{B}$ was the dominant decay mode of this new state. These discoveries ushered in the program of $B$ physics pursued successfully at DESY, CERN, Fermilab, SLAC, and KEK, as well as at CESR. As BaBar and Belle took over the field of $B$ physics at the $\Upsilon(4S)$, the CLEO collaboration turned its attention to the charm threshold regi on. I will describe some early discoveries at CESR, highlights of CLEO's $B$ physics program with CESR at the $e^+e^-$ luminosity frontier, and recent CLEO results on charmonium and $D$ physics. Much of this report is based on a draft of an invited paper on this subject by Karl Berkelman, who tragically passed away before this conference. This paper is dedicated to his memory.   

State of Heavy Flavor

I present recent results in heavy flavor physics from the CDF and D0 experiments at the Fermilab Tevatron. An overview of heavy flavor lifetime, spectroscopy, and CP violation results will be shown, with an intention to highlight the breadth of heavy flavor results from the CDF and D0 experiments. I will also indicate new and improved results which can be anticipated in the final years of Run II.