Search for pair production of excited top quarks in the lepton plus jets final state

2014
Authors
Chatrchyan, S.Adžić, Petar
Đorđević, Miloš

Ekmedžić, Marko

Krpić, D.
Milošević, Jovan

Milenović, Predrag

Reković, Vladimir

CMS Collaboration (ukupan broj autora: 2222)
Article
Metadata
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A search is performed for pair-produced spin-3/2 excited top quarks , 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 = 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.
Keywords:
Hadron-Hadron Scattering / Top physicsSource:
Journal of High Energy Physics, 2014, 6Funding / projects:
- BMWF and FWF (Austria), FNRS, FWO (Belgium), CNPq, CAPES, FAPERJ, FAPESP (Brazil), MEYS (Bulgaria), CERN, CAS, MoST, NSFC (China), COLCIENCIAS (Colombia), MSES (Croatia), RPF (Cyprus), MoER [SF0690030s09], ERDF (Estonia), Academy of Finland, MEC, MEC, and HIP (Finland), CEA, CNRS/IN2P3 (France), BMBF, Germany, DFG, HGF (Germany), NKTH (Hungary)
DOI: 10.1007/JHEP06(2014)125
ISSN: 1029-8479
WoS: 000338448300001
Scopus: 2-s2.0-84904325840
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VinčaTY - JOUR AU - Chatrchyan, S. AU - Adžić, Petar AU - Đorđević, Miloš AU - Ekmedžić, Marko AU - Krpić, D. AU - Milošević, Jovan AU - Milenović, Predrag AU - Reković, Vladimir PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6060 AB - A search is performed for pair-produced spin-3/2 excited top quarks , 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 = 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. T2 - Journal of High Energy Physics T1 - Search for pair production of excited top quarks in the lepton plus jets final state IS - 6 DO - 10.1007/JHEP06(2014)125 ER -
@article{ author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir", year = "2014", abstract = "A search is performed for pair-produced spin-3/2 excited top quarks , 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 = 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.", journal = "Journal of High Energy Physics", title = "Search for pair production of excited top quarks in the lepton plus jets final state", number = "6", doi = "10.1007/JHEP06(2014)125" }
Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2014). Search for pair production of excited top quarks in the lepton plus jets final state. in Journal of High Energy Physics(6). https://doi.org/10.1007/JHEP06(2014)125
Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Krpić D, Milošević J, Milenović P, Reković V. Search for pair production of excited top quarks in the lepton plus jets final state. in Journal of High Energy Physics. 2014;(6). doi:10.1007/JHEP06(2014)125 .
Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Search for pair production of excited top quarks in the lepton plus jets final state" in Journal of High Energy Physics, no. 6 (2014), https://doi.org/10.1007/JHEP06(2014)125 . .