Compact Muon Solenoid
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| CMS-PAS-TOP-15-014 | ||
| Measurement of the top quark mass in $\mathrm{t}\bar{\mathrm{t}}$ events with a $\mathrm{J}/\psi$ from pp collisions at 8 TeV | ||
| CMS Collaboration | ||
| March 2016 | ||
| Abstract: The first measurement of the top quark mass using top quark decays in the exclusive decay channel $\mathrm{t}\to(\mathrm{W}\to\ell\nu)$, $(\mathrm{b}\to\mathrm{J}/\psi+\mathrm{X}\to\mu^+\mu^-+\mathrm{X})$ is presented. Top quark pair events in proton-proton collisions recorded with the CMS detector at a center-of-mass energy of 8 TeV are selected. The dataset corresponds to an integrated luminosity of 19.7 fb$^{-1}$ and yields 666 $\mathrm{t}\bar{\mathrm{t}}$ events containing one $\mathrm{J}/\psi$ candidate in which the $\mathrm{J}/\psi$ decays into an opposite sign muon pair. The mass of the ($\mathrm{J}/\psi+\ell$) system, where $\ell$ is an electron or a muon from the W boson decay, is used to extract a top quark mass of $M_\mathrm{t} =$ 173.5 $\pm$ 3.0 (stat) $\pm$ 0.9 (syst) GeV. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, JHEP 12 (2016) 123. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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