
JOINT PARTICLE SEMINAR
NOTE SPECIAL TIME
Date: Tuesday, 22 March 2005
Time:
3:00 p.m.
Place: 4135 Frederick Reines Hall
Speaker:
Chris Hays, Duke
Title:
Toward the World's Most Precise W Mass Measurement with CDF
Abstract:
When combined with other electroweak parameters, the W mass
provides the most accurate prediction of the mass of the Higgs boson, the
last remaining unobserved standard model particle. The measurement of the
W mass is therefore a high priority at the Fermilab Tevatron, where it was
measured in Run 1 to a precision of better than a part in 1000. The CDF
collaboration has analyzed the first 200/pb of Run 2 data and determined
the corresponding measurement uncertainty to be 76 MeV, which is below the
CDF combined Run 1 uncertainty. With the expected collection of an order
of magnitude more data over the next two years, the measurement will
achieve better precision than the current world uncertainty of 34 MeV.
When combined with the measurement of the top mass, the full set of Run 2
data will indirectly determine the Higgs mass with an accuracy of 25%.
Host: A. Lankford