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Type of Document Dissertation Author Torborg, Julie Author's Email Address jtorborg@fnal.gov URN etd-07152005-095852 Title The Charge Asymmetry in W Bosons Produced in Proton-Antiproton Collisions at Center-of-Mass Energy 1.96 TeV Degree Doctor of Philosophy Department Physics Advisory Committee
Advisor Name Title Anna Goussiou Committee Member Michael Hildreth Committee Member Michael Wiescher Committee Member Mitch Wayne Committee Member Keywords
- QCD
- Electroweak
- Parton Distribution Functions
- Charge Asymmetry
- W Boson
Date of Defense 2005-06-29 Availability unrestricted Abstract The primary mode of production of W+ bosons in a proton-antiproton collider is u + anti-d -> W+.The u quark generally carries more momentum than the anti-d and the resultant W+ tends to be boosted in the proton direction.
Similarly, W- bosons are boosted in the anti-proton direction.
This is observed as an asymmetry in the rapidity distributions of positive and negative W bosons.
Measurement of this asymmetry serves as a probe of the momentum distribution of partons within the proton.
These distributions are required as input to the calculation of every proton-antiproton production cross section.
This thesis presents the first measurement at DZero of the charge asymmetry of the W boson production cross section as measured in W -> electron + neutrino decays in 0.3 fb^-1 of proton-antiproton collisions collected with the DZero Detector.
Theoretical predictions made using the CTEQ6.1M and MRST(2004) parton distribution functions are compared with the measurement.
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