Precise measurement of the top quark mass in the dilepton channel at D0
D0 Collaboration, V. M. Abazov, B. Abbott, B. S. Acharya, M. Adams, T., Adams, G. D. Alexeev, G. Alkhazov, A. Alton, G. Alverson, G. A. Alves, L. S., Ancu, M. Aoki, M. Arov, A. Askew, B. {\AA}sman, O. Atramentov, C. Avila, J., BackusMayes, F. Badaud, L. Bagby, B. Baldin
TL;DR
This paper reports the most precise measurement to date of the top quark mass in the dilepton decay channel using data from the D0 detector at Fermilab, achieving high accuracy and consistency with the world average.
Contribution
It presents a new, highly precise measurement of the top quark mass in the dilepton channel using 5.4 fb-1 of data from the D0 experiment.
Findings
Measured top quark mass: 174.0 GeV
Uncertainty: ±1.8 (stat) ±2.4 (syst) GeV
Consistent with the world average
Abstract
We measure the top quark mass (mt) in ppbar collisions at a center of mass energy of 1.96 TeV using dilepton ttbar->W+bW-bbar->l+nubl-nubarbbar events, where l denotes an electron, a muon, or a tau that decays leptonically. The data correspond to an integrated luminosity of 5.4 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider. We obtain mt = 174.0 +- 1.8(stat) +- 2.4(syst) GeV, which is in agreement with the current world average mt = 173.3 +- 1.1 GeV. This is currently the most precise measurement of mt in the dilepton channel.
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