CMS-PAS-TOP-14-005

CMS-PAS-TOP-14-005
Search for Anomalous Top Chromomagnetic Dipole Moments from angular distributions in $\mathrm{ t\bar{t} }$ Dileptonic events at $\sqrt{s} =$ 7 TeV with the CMS detector.
CMS Collaboration
2014

Abstract: A search for new physics in the form of a top quark chromo-magnetic anomalous coupling is performed using a previous measurement of the differential $\mathrm{t\bar{t}}$ cross section as a function of the difference in azimuthal angle between the two charged leptons, $\|\Delta \phi_{ \ell \ell }\|$ , in the dilepton decay mode. The measured value of $\mathrm{Re}( \hat{\mu}_t )$ is 0.037 $\pm$ 0.041 and no sign of new physics is observed.Limits on the real part of the chromomagnetic dipole moment $\mathrm{Re}( \hat{\mu}_t )$ are determined at 95% Confidence Level as -0.043 $< \mathrm{Re}( \hat{\mu}_t ) <$ 0.117.
Links: CDS record (PDF) ; inSPIRE record ; Public twiki page ; CADI line (restricted) ;

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