| DATE: |
2005-08-23 16:00 - 17:00 |
| PLACE: |
Room 345 in the 4th building, 3rd floor |
| TITLE: |
Physics Seminar: Top Quark Mass Measurement in CDF Run II |
| CONTACT: |
4342 |
| SPEAKER: |
Koji Sato (University of Tsukuba) |
| LANGUAGE: |
English |
| URL: |
http://seminar.kek.jp/physics/ |
| ABSTRACT: |
Top quark was discovered in pbar p collisions of TEVATRON Run I in 1995. It still remains one of the least well-studied elementary particles discovered so far. The measurement of the mass of the top quark is especially valuable as an input to precision electroweak analyses where the validity of the Standard Model can be checked extensively. Due to its uniquely heavy mass, the top quark is expected to strongly couple with the Higgs boson, and the measurement of the top quark mass along with the W boson mass constrains the mass of the Higgs boson. TEVATRON and its detectors have been upgraded in the last decade in order to offer a better potencial for physics studies, and started the Run II in 2001. The top quark mass 173.5 +4.1/-4.0 GeV/c2 measured by CDF Collaboration using 320 pb^{-1} of lepton+jets dataset of Run II in Spring 2005 already surpasses the previous world average. At the same time, CDF Collaboration is trying several new measurement techniques to better exploit the potential of TEVATRON Run II. The seminar will focus on our best measurement, as well as summarize the status of the new measurement schemes.
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