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UO Center for High Energy Physics

Seminars - Fall 1999

January 7, 2000

Dr. Eric Torrence, University of Chicago

Beam Energy Measurements at LEP

3:00pm, 240D Willamette Hall

Dr. Torrence will also present the Physics Colloquium on January 6.

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January 25, 2000

Dr. Masahiro Morii, SLAC

First Year of PEP-II/BaBar


The BaBar Experiment at PEP-II, SLAC, has made a succesfull first step in 1999. Both the accelerator and the detector have demonstrated excellent performances, placing the experiment in a highly competitive position among the experiments that aim at measurements of CP violation in the B system. In this talk, the current status of the experiment and the progress of the data analysis will be reported. The prospect of the first CP measurement in the near future will be discussed.

3:00pm, 472 Willamette Hall

Dr. Morii will also present the Physics Colloquium on January 24.

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January 31, 2000

Dr. Evan Mauceli, UofO

Cosmic Rays Observed by the Resonant Gravitational Wave Detector NAUTILUS

Abstract: The passage of cosmic rays has been observed to excite mechanical vibrations in the resonant gravitational wave detector NAUTILUS.

4:00pm, 318 Willamette Hall

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February 4, 2000

Dr. Manfred Paulini, Lawrence Berkeley National Laboratory

B Tagging, B Mixing and CP Violation at CDF


The primary B physics goals of the CDF experiment at Fermilab are measuring CP violation in the B meson system and observing Bs Bs= flavour oscillations in the next run of the Tevatron pp= Collider. Essential for both measurements are tagging the B flavour, i.e. determining whether the B meson contains a b quark or b antiquark. We describe recent results of B flavour tagging studies using current CDF data, their application toward measurements of the time dependence of BB= oscillations and a determination of the CP violation parameter sin(2 beta) with CDF's current sample of J/Psi K0s events. CDF's prospects for CP violation and Bs mixing in the next run of the Tevatron Collider are also reviewed.

3:00pm, 472 Willamette Hall

Dr. Paulini will also present the Physics Colloquium on February 3.

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February 25, 2000

Prof. Sally Seidel, University of New Mexico

Jet Physics at the Tevatron

Results are presented for the inclusive jet, differential dijet, and dijet mass cross sections versus jet transverse energy, as measured for proton-antiproton collisions at center of mass energy 1.8 TeV. Data from the CDF and D0 detectors at Fermilab's Tevatron collider are described and compared to next-to-leading order QCD predictions using different parton distribution functions. The ratio of the inclusive jet cross sections at center of mass energies 0.63 TeV and 1.8 TeV is also presented versus scaled jet transverse energy x_T and compared to QCD predictions.

3:00pm, 472 Willamette Hall

Prof. Seidel will also also present the Physics Colloquium on February 24.

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