Sirunyan, AM and Tumasyan, A (2019) Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton plus jets final state in pp collisions at root s=13 TeV. In: EUROPEAN PHYSICAL JOURNAL C, 79 (3).
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Abstract
A search is presented for a heavy spin- 1 resonance Z decaying to a top quark and a vector- like top quark partner T in the lepton + jets final state. The search is performed using a data set of pp collisions at a centre- of- mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb - 1 as recorded by the CMS experiment at the CERN LHC in the year 2016. The analysis is optimised for final states arising from the T decay modes to a top quark and a Higgs or Z boson ( T. Ht, Zt). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and Z and W bosons using jet substructure techniques. No significant deviation from the standard model background expectation is observed. Exclusion limits on the product of the cross section and branching fraction for Z . tT, T. Ht, Zt, Wb are presented for various combinations of the Z resonance mass and the vector- like T quark mass. These results represent the most stringent limits to date for the decay mode Z . tT. tHt. In a benchmark model with extra dimensions, invoking a heavy spin- 1 resonance G *, masses of the G * between 1.5 and 2.3 TeV and between 2.0 and 2.4 TeV are excluded for T masses of 1.2 and 1.5 TeV,
| Item Type: | Journal Article |
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| Publication: | EUROPEAN PHYSICAL JOURNAL C |
| Additional Information: | Copyright of this article belongs to the authors |
| Department/Centre: | Division of Physical & Mathematical Sciences > Centre for High Energy Physics |
| Date Deposited: | 03 Jul 2019 07:22 |
| Last Modified: | 03 Jul 2019 07:22 |
| URI: | http://eprints.iisc.ac.in/id/eprint/62840 |
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