# UCL Discovery

## PDF and QCD eects in the precision measurement of the W boson mass at CDF

Beecher, D.P.; (2011) PDF and QCD eects in the precision measurement of the W boson mass at CDF. Doctoral thesis, UCL (University College London).

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## Abstract

A sample of W \rightarrow ev (W \rightarrow \mu v) and Z^0 \rightarrow e^+e^- (Z^0 \rightarrow \mu^+\mu^-) events recorded by the CDF detector for pp- collisions at \sqrt(s-hat) = 1:96 TeV with a total integrated luminosity of 2.3 fb^-1 are used to evaluate the systematic uncertainty in the determination of the W boson mass arising from uncertainties in the parton distribution functions and higher-order QCD effects. The systematic contribution of PDFs is determined to be 10 MeV for MSTW2008 NLO and 12 MeV for CTEQ6.6. The total systematic contribution arising from higher-order QCD eects in 9 MeV. The unfolded Z0 transverse momentum distribution is presented, and estimates of parameters in a phenomenological model describing low transverse momentum Z^0 events are extracted.

Type: Thesis (Doctoral) PDF and QCD eects in the precision measurement of the W boson mass at CDF An open access version is available from UCL Discovery English The abstract contains LaTeX text. Please see the attached pdf for rendered equations UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy http://discovery.ucl.ac.uk/id/eprint/1310142