Measurement of the Top Quark mass using data from CDF experiment at Tevatron Fedor Prokoshin.
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Transcript of Measurement of the Top Quark mass using data from CDF experiment at Tevatron Fedor Prokoshin.
Measurement of the Top Quark mass
using data from CDF experimentat Tevatron
Fedor Prokoshin
Particles our world is made of
Neutrino
Leptons and quarks
Top Quark
Top QuarkmassMtop = 173.1±1.3 GeV/c2
• twice of W±, Z0
• 2 orders b• 4 orders u, d• 5 orders e-
Why Measure the Top Quark Mass?
• mtop is a fundamental parameter of the Standard Model
• constrains the mass of the elusive Higgs Boson: 1-loop corrections to mW depend quadratically on the top quark mass mtop and logarithmically on mH. Measuring mtop and mW one can extract information on mH
22tW mm
W W
H
W
W W
t
b
HW mm log2
173.1 1.3tM GeV 2009
174 15tM GeV 1994-95
CDF199 30tM GeV DǾ
History of top mass measurements
172.1 1.4tM GeV 2008
170.9 1.8tM GeV 2007
171.4 2.1tM GeV 2006
178.0 4.3tM GeV 2004 (Data 1992-1996)
172.7 2.9tM GeV 2005
176.7 7.1tM GeV 2004
Main Injectorand Recycler
p source
Booster
DD Tevatron
• Collisions every 396 ns• Beam energy 980 GeV s = 1.96 TeV
• Inst. Lum. ~5x1032 cm-
2s-1
CDF Detector
CDF II Collaboration
BACKUP SLIDES
Gervasio Gomez/CDF Moriond EW 2005 14
Top MassMt 175 GeV Yukawa coupling 1 Special role in EWSB?
Dominant parameter in radiative corrections:
quadratic in mt , logarithmic in mH
GeV166181
),(,sin,, 2
top
WFBZZ
M
MZAM
GeV100070HiggsMHiggstop MEWM
Mt from precision EW measurements