Abstract
We present a study of the normalized transverse momentum distribution of $W$ bosons produced in $p \bar p$ collisions, using data corresponding to an integrated luminosity of 4.35 fb$^{-1}$ collected with the D0 detector at the Fermilab Tevatron collider at $\sqrt{s}=1.96$ TeV. The measurement focuses on the transverse momentum region below 15 GeV, which is of special interest for electroweak precision measurements; it relies on the same detector calibration methods which were used for the precision measurement of the $W$ boson mass. The measured distribution is compared to different QCD predictions and a procedure is given to allow the comparison of any further theoretical models to the D0 data.
Highlights
The production of V 1⁄4 ðW=ZÞ bosons in hadron collisions is described by perturbative quantum chromodynamics (QCD)
A fast folding procedure is introduced in the Appendix, which can be used to compare our result to other theoretical predictions while properly accounting for the detector response
The central tracking system consists of a silicon microstrip tracker (SMT) and a scintillating fiber tracker, both located within a 1.9 T superconducting solenoid magnet and optimized for tracking and vertexing for jηdetj < 2.5
Summary
The production of V 1⁄4 ðW=ZÞ bosons in hadron collisions is described by perturbative quantum chromodynamics (QCD). Knowledge of the pVT spectrum is important for testing perturbative QCD predictions and constraining models of nonperturbative approaches, and for the measurement of electroweak parameters such as the W boson mass. In the latter case, it is especially important to model the pWT spectrum correctly in the low pT region. The transverse momentum spectrum of the Z boson has been measured to high precision at various energies, both at the Tevatron [13,14,15,16] and the LHC [17,18,19,20,21,22] This precision is enabled by the fact that leptonically-decaying. A fast folding procedure is introduced in the Appendix, which can be used to compare our result to other theoretical predictions while properly accounting for the detector response
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