Measurement of the top quark mass in $\boldsymbol{\ppbar}$ collisions using events with two leptons

Details Measurement of the top quark mass in $\boldsymbol{\ppbar}$ collisions using events with two leptons Measurement of the top quark mass in $\boldsymbol{\ppbar}$ collisions using events with two leptons

2012-01-25

arxiv.org/abs/1201.5172v1

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 1 figure, submitted to Phys. Rev. Letters

Scientific paper

We present a measurement of the top quark mass ($m_t$) in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV using $t\bar{t}$ events with two leptons ($ee$, $e\mu$ or $\mu\mu$) in the final state in 4.3 fb$^{-1}$ of data collected with the D0 detector at the Fermilab Tevatron collider. We analyze the kinematically underconstrained dilepton events by integrating over the neutrino rapidity distributions. We reduce the dominant systematic uncertainties from jet energy calibration using a correction obtained from $t\bar{t}\rightarrow\ell+$jets events. We also correct jets in simulated events to replicate the quark flavor dependence of the jet response in data. In combination with our previous analysis, we measure $m_t = 174.0\pm2.4(\rm stat)\pm1.4(\rm syst)$ GeV.

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