Search for top partners with charge 5e/3 in the same-sign dilepton final state

Links to documentation in CDS

• PAS B2G-12-012

Abstract

A search for the production of heavy partners of the top quark with charge 5e/3 in same-sign leptonic events is performed. The data sample corresponds to an integrated luminosity of L = 19.6 fb^-1 and was collected at a center of mass energy of sqrt(s)=8 TeV by the CMS experiment at the Large Hadron Collider. No significant excess is observed in the data above the expected standard model background and upper bounds are set on the production cross section of heavy top quark partners. Masses below 770~GeV are excluded at the 95% confidence level.

Approved Plots from B2G-12-012 ( click on plot to get .pdf )

Figure	Abbreviated Caption
	Pair production of T5/3 quarks via gluon fusion and decay to same-sign dilepton final states. Figure taken from arXiv:0801.1679 .
	Event 25787738 from run 208357.
	Event 275039437 from run 199699.
	The distribution of the leading lepton pT in the dielectron channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of the leading lepton pT in the electron-muon channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of the leading lepton pT in the dimuon channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of the leading lepton pT in all channels combined after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of the leading jet pT in the dielectron channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of the leading jet pT in the electron-muon channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of the leading jet pT in the dimuon channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of the leading jet pT in all channels combined after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of HT in the dielectron channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of HT in the electron-muon channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of HT in the dimuon channel after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	The distribution of HT in all channels combined after the same-sign selection, the Z/quarkonia lepton invariant mass veto and a requirement of at least two jets.
	Expected and observed 95% C.L. limits on the T5/3 production cross section. The 1-sigma and 2-sigma combined statistical and systematic expected variation is shown as a yellow (light) and green (dark) band, respectively.
	The distribution of the reconstructed T5/3 mass in the dielectron channel after the same-sign selection and the Z/quarkonia lepton invariant mass veto.
	The distribution of the reconstructed T5/3 mass in the muon-electron channel after the same-sign selection and the Z/quarkonia lepton invariant mass veto.
	The distribution of the reconstructed T5/3 mass in the dimuon channel after the same-sign selection and the Z/quarkonia lepton invariant mass veto.
	The distribution of the reconstructed T5/3 mass in all channels combined after the same-sign selection and the Z/quarkonia lepton invariant mass veto.