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 Muons D0
Date of Defense	2006-05-23
Availability	unrestricted
Abstract This 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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