CERN Accelerating science

CMS Note
Report number	CMS-CR-2016-220
Title	Search for $t \bar{t}$ Resonances at CMS
Author(s)	McLean, Christine (UC, Davis)
Collaboration	CMS
Publication	SISSA, 2016
Number of pages	5
In:	PoS LHCP2016 (2016) 222
In:	4th Conference on Large Hadron Collider Physics 2016 (LHCP 2016), Lund, Sweden, 13 - 18 Jun 2016, pp.222
DOI	10.22323/1.276.0222
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	We present a search for new massive particles decaying to a pair of top quarks with the CMS de- tector at the LHC. Proton-proton collision data recorded at a center-of-mass energy of 13 TeV is used. The search is performed by measuring the invariant mass distribution of the top-quark pair and testing for deviations from the expected Standard Model background. Final states with 0 or 1 leptons are considered, and the selection is optimized accordingly. In the high mass ranges acces- sible by the LHC at these energies, the top quarks are produced with high transverse momenta: the products of hadronically decaying top quarks emerge as a single jet, whereas the products of the semileptonic decay mode are characterized by the overlap of the lepton and the b jet. Specific reconstruction algorithms and selections are employed to address the identification of boosted top quark signatures. The results are presented in terms of upper limits on the model cross sec- tion. Models of Randall-Sundrum Kaluza-Klein gluon production as well as narrow, wide, and extra-wide Z ′ boson models are considered.
Copyright/License	publication: (License: CC-BY-NC-SA)

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