Status of the Muon g-2 experiment at Fermilab

The aim of the Muon g-2g−2 Experiment at Fermilab (E989) is to measure the muon anomalous magnetic moment (a_\muaμ) with a relative precision of 140 parts-per-billion (ppb). This precision, which is a factor of four improvement from the current experimental result, will allow for a much more stringent test of the Standard Model. This paper present the current status of the experimental measurement of a_\muaμ after the first physics run

Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron

The CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use the full data sets collected in proton-antiproton collisions at a center-of-mass energy of $\sqrt s =1.96$ TeV. We report the results of combinations of the inclusive asymmetries and their differential dependencies on relevant kinematic quantities. The combined inclusive asymmetry is $A_{\mathrm{FB}}^{t\bar{t}} = 0.128 \pm 0.025$. The combined inclusive and differential asymmetries are consistent with recent standard model predictions

Measurement of the W + jets differential cross-sections in pp collisions at 1as = 1.96 TeV using the CDF II Detector

In this thesis the measurements of differential cross sections for the production of the W-boson in association with jets in proton-anti-proton collisions at 1as = 1.96 TeV are presented. The measurements are based on 9.0/fb of CDF Run II data (i.e., the full dataset). Only events in which the W-boson decays leptonically (i.e., W\u2192e\u3bd and W\u2192\u3bc\u3bd) and at least one jet is present are considered. The leptons candidates are required to have a transverse energy greater than 25 GeV and pseudorapidity in the range |\u3b7| < 1 whereas, the reconstructed jets must have transverse energy grater than 25 GeV and pseudorapidity in the range |\u3b7| < 2. The reconstructed W-boson transverse mass should be grater than 40 GeV/c2. The differential cross sections as a function of the jet multiplicity (N 65 1, 2, 3, 4) and the leading jet transverse energy, are measured separately for each decay channel and then combined. For a meaningful comparison with theory the measured cross-sections are unfolded to remove detector effects. The resulting particle-level cross-sections are compared to theoretical predictions