This thesis presents work towards the first measurement of the mass of the W boson (m<sub>W</sub>) at ATLAS at the Large Hadron Collider using √s = 7 TeV collision data taken in 2011. The electron energy calibration is presented, including a detailed study of the linearity of the ATLAS electromagnetic calorimeter. Separately, the measurement of the W boson recoil is calibrated using Z boson events. Recoil corrections for the underlying event, pileup, recoil magnitude resolution, recoil angular resolution and recoil response mismodelling are determined, with statistical uncertainties on these corrections corresponding to an estimated uncertainty on m<sub>W</sub> of 3.9 MeV. The corrections for calorimeter non-linearity and recoil modelling improve the description of the data, though systematic biases remain. To achieve a precision commensurate with the statistics of the data, these biases will need to be understood.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:647658 |
| Date | January 2014 |
| Creators | Davies, Eleanor Lucy |
| Contributors | Hays, Christopher; Haywood, Stephen |
| Publisher | University of Oxford |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://ora.ox.ac.uk/objects/uuid:61c91234-837d-4462-9e29-c317f90001ed |
Page generated in 0.002 seconds