Compact Muon Solenoid
LHC, CERN
Visit us: CMS Public Website, CMS Physics ;
Contact us: CMS Publications Committee
| CMS-PAS-TOP-14-017 | ||
| Measurement of the W boson helicity using $\mathrm{ t \bar{t} }$ events in the dilepton final state at $\sqrt{s} =$ 8 TeV | ||
| CMS Collaboration | ||
| July 2015 | ||
| Abstract: A measurement of the W boson helicity fractions in top quark decays is presented. The measurement is performed using a sample of top quark pair events with two opposite-sign leptons (electron or muon) in the final state. The sample was recorded in proton-proton collisions at a center-of-mass energy of 8 TeV, and corresponds to an integrated luminosity of 19.7fb$^{-1}$. The longitudinal, left-handed and right-handed helicity fractions are measured to be $F_{\rm 0}=0.653\pm 0.016 (\text{stat}) \pm 0.024 (\text{syst})$, $F_{\rm L}=0.329\pm 0.009 (\text{stat}) \pm 0.025 (\text{syst})$ and $F_{\rm R}=0.018\pm 0.008 (\text{stat}) \pm 0.026 (\text{syst})$, respectively. The results are found to be in agreement with predictions of the standard model. | ||
| Links: CDS record (PDF) ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
|
|
Compact Muon Solenoid LHC, CERN |
|
|
|
|
|
|