1. Measurement of the Top Quark mass using data from CDF experiment at Tevatron Fedor Prokoshin

2. Particles our world is made of Neutrino

4. Leptons and quarks

5. Top Quark

6. mass M top = 173.1±1.3 GeV/c 2GeVc twice of W ±, Z 0 2 orders b 4 orders u, d 5 orders e -

7. Why Measure the Top Quark Mass? m top is a fundamental parameter of the Standard Model constrains the mass of the elusive Higgs Boson: 1-loop corrections to m W depend quadratically on the top quark mass m top and logarithmically on m H. Measuring m top and m W one can extract information on m H WW H W WW t b

9. 2009 1994-95 CDF DǾ History of top mass measurements 2008200720062004 (Data 1992-1996)20052004

10. Main Injector and Recycler  p source Booster Tevatron Collisions every 396 ns Beam energy 980 GeV  s = 1.96 TeV Inst. Lum. ~5x10 32 cm -2 s -1

11. CDF Detector

12. CDF II Collaboration

13. BACKUP SLIDES

14. Gervasio Gomez/CDFMoriond EW 200514 Top Mass Mt  175 GeV  Yukawa coupling  1Special role in EWSB? Dominant parameter in radiative corrections: quadratic in m t, logarithmic in m H Mt from precision EW measurements