# Measurement of the top quark mass in the $t\bar{t}\to$ dilepton channel from $\sqrt{s}=8$ TeV ATLAS data

Abstract : The top quark mass is measured in the $t\bar{t}\to$ dilepton channel (lepton $= e, \mu$) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton--proton centre-of-mass energy of $\sqrt{s}=$ 8 TeV and correspond to an integrated luminosity of about 20.2 fb$^{-1}$. Exploiting the template method, and using the distribution of invariant masses of lepton--b-jet pairs, the top quark mass is measured to be $m_{top} =$ 172.99 $\pm$ 0.41 (stat) $\pm$ 0.74 (syst) GeV, with a total uncertainty of 0.84 GeV. Finally, a combination with previous ATLAS $m_{top}$ measurements from $\sqrt{s}=$7 TeV data in the $t\bar{t}\to$ dilepton and $t\bar{t}\to$ lepton+jets channels results in $m_{top} =$ 172.84 $\pm$ 0.34 (stat) $\pm$ 0.61 (syst) GeV, with a total uncertainty of 0.70 GeV.
Type de document :
Article dans une revue
Physics Letters B, Elsevier, 2016, 761, pp.350-371. 〈10.1016/j.physletb.2016.08.042〉

http://hal.in2p3.fr/in2p3-01328567
Contributeur : Claudine Bombar <>
Soumis le : mercredi 8 juin 2016 - 11:13:09
Dernière modification le : jeudi 7 février 2019 - 15:20:18

### Citation

M. Aaboud, Z. Barnovska, N. Berger, L. Di Ciaccio, S. Elles, et al.. Measurement of the top quark mass in the $t\bar{t}\to$ dilepton channel from $\sqrt{s}=8$ TeV ATLAS data. Physics Letters B, Elsevier, 2016, 761, pp.350-371. 〈10.1016/j.physletb.2016.08.042〉. 〈in2p3-01328567〉

### Métriques

Consultations de la notice