Type of Document Dissertation Author Sengupta, Sinjini URN etd-07102006-123810 Title A Precision Measurement of the W to Munu Charge Asymmetry at a Center of Mass Energy of 1.96 TEV Using the D0 Detector. Degree Doctor of Philosophy Department Physics, Department of Advisory Committee
Advisor Name Title Susan K. Blessing Committee Chair Harrison B. Prosper Committee Member Horst D. Wahl Committee Member Joseph Owens III Committee Member Simon Capstick Committee Member William Landing Committee Member Keywords
- Charge Asymmetry
- Parton Distribution Functions
Date of Defense 2006-05-23 Availability unrestricted AbstractThis dissertation describes a measurement of the muon charge asymmetry from W boson decays. The charge asymmetry provides useful information about the momentum distribution of u and d quarks inside the proton. The charge asymmetry was measured using ~230 1/pb of data collected between 2002 and 2004 using the D0 detector at the Tevatron collider at Fermi National Accelerator Laboratory. In the Tevatron, protons and antiprotons collide with a center of mass energy of 1.96 TeV.
The signal consists of one high transverse momentum muon and missing transverse energy while the background which comes from other events also
producing a high transverse momentum muon. As the charge asymmetry depends on the number of positive and negative muons from the W boson decay in
each bin of pseudorapidity, the background are removed. The resultant distribution is compared with predictions from NLO calculations using the CTEQ6.1M and the MRST02 PDFs. This is the first
approved result for the W charge asymmetry from D0.
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