Measurement of the Top Quark Mass in Dilepton Final States using Neutrino Weighting in Run II at D{\O}

A measurement is presented of the mass of the top quark (m$_{\mathrm{t}})$ in inclusive dilepton final states of ttbar events. The expected neutrino rapidity distribution is used to solve an otherwise underconstrained kinematic fit to the ttbar hypothesis. Solutions are given weights according to the degree of agreement between their calculated imbalance in transverse momentum (missing E$_{\mathrm{T}})$ and the events observed values of missing E$_{\mathrm{T}}$. The first two moments of the distribution of weights as a function of m$_{\mathrm{t}}$ are used to extract a measurement of m$_{\mathrm{t}}$. Ensemble tests of pseudo-experiments are performed to calibrate and correct the extracted m$_{\mathrm{t}}$, and to estimate its statistical uncertainty. Events corresponding to an integrated luminosity of 9.7 fb$^{\mathrm{-1}}$ of D{\O} Run II data collected in the e$\mu $, ee and $\mu \mu $ channels are used for this analysis. The calibration is performed using a ttbar cross section expected for mt $=$ 172.5 GeV. A number of optimizations are developed and we expect the improvement to the statistical uncertainty of m$_{\mathrm{t}}$ to be 20{\%}.