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Search for pair production of excited top quarks in the lepton + jets final state
CMS Collaboration Bean, Alice
CMS Collaboration
Bean, Alice
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Abstract
A search is performed for pair-produced spin-3/2 excited top quarks (t∗t¯∗), each decaying to a top quark and a gluon. The search uses data collected with the CMS detector from pp collisions at a center-of-mass energy of s√ = 8 TeV, selecting events that have a single isolated muon or electron, an imbalance in transverse momentum, and at least six jets, of which one must be compatible with originating from the fragmentation of a b quark. The data, corresponding to an integrated luminosity of 19.5 fb−1, show no significant excess over standard model predictions, and provide a lower limit of 803 GeV at 95% confidence on the mass of the spin-3/2 t* quark in an extension of the Randall-Sundrum model, assuming a 100% branching fraction of its decay into a top quark and a gluon. This is the first search for a spin-3/2 excited top quark performed at the LHC.
Description
This is the published version.
Date
2014-06
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Springer Verlag
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Keywords
Hadron-Hadron Scattering, Top physics
Citation
The CMS collaboration. "Search for pair production of excited top quarks in the lepton + jets final state." Journal of High Energy Physics. June, 2014, v5n6. http://dx.doi.org/10.1007/JHEP06(2014)125