Measurement of the Shape of the Boson-Transverse Momentum Distribution in $p\overline{p}\to Z/{\gamma }^{*}\to e^{+}{e}^{-}+X$ Events Produced at $\sqrt{s}=1.96\mathrm{TeV}$

We present a measurement of the shape of the $Z/{\gamma }^{*}$ boson transverse momentum ($q_T$) distribution in $p\overline{p}\to Z/{\gamma }^{*}\to e^{+}{e}^{-}+X$ events at a center-of-mass energy of 1.96 TeV using $0.98{\mathrm{fb}}^{-1}$ of data collected with the D0 detector at the Fermilab Tevatron collider. The data are found to be consistent with the resummation prediction at low $q_T$, but above the perturbative QCD calculation in the region of $q_T>30\mathrm{GeV}/c$. Using events with $q_T<30\mathrm{GeV}/c$, we extract the value of $g_2$, one of the nonperturbative parameters for the resummation calculation. Data at large boson rapidity $y$ are compared with the prediction of resummation and with alternative models that employ a resummed form factor with modifications in the small Bjorken $x$ region of the proton wave function.