# A Precise Measurement of the W Boson Mass with CDF

- Institution: CERN
- Department: EP Seminar
- Speaker: Chris Hays
- Year: 2012
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3018917)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

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/c^2..

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## Lectures

1. [A Precise Measurement of the W Boson Mass with CDF](https://invisiblenetwork.ai/learn/cern/3018917/d5607e897783), 1 h 7 min (CERN's player)