Séminaires
A Precise Measurement of the W Boson Mass with CDF
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Europe/Paris
Amphithéâtre (CPPM)
Amphithéâtre
CPPM
Description
The W boson mass measurement probes quantum corrections to the W
propagator, such as those arising from supersymmetric particles or Higgs
bosons. The new measurement from CDF is more precise than the
previous world average, providing a stringent constraint on
the mass of the Higgs boson in the context of the Standard Model. I
describe this measurement, performed with 2.2/fb of data using 1.1
million candidates in the electron and muon decay channels, with three
kinematic fits in each channel. The measurement uses in-situ
calibrations from cosmic rays, J/psi and Upsilon data, and W- and Z-boson
decays, with multiple cross-checks including independent determinations
of the Z boson mass in both channels. The W-boson mass is measured to be
80387 +- 19 MeV/c2.