Search for a narrow, spin-2 resonance decaying to a pair of Z bosons in the qq̄ℓ+ℓ- final state
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
29/01/2013
|
Resumo |
Results are presented from a search for a narrow, spin-2 resonance decaying into a pair of Z bosons, with one Z-boson decaying into leptons (e+e- or μ+μ-) and the other into jets. An example of such a resonance is the Kaluza-Klein graviton, GKK, predicted in Randall-Sundrum models. The analysis is based on a 4.9 fb-1 sample of proton-proton collisions at a center-of-mass energy of 7 TeV, collected with the CMS detector at the LHC. Kinematic and topological properties including decay angular distributions are used to discriminate between signal and background. No evidence for a resonance is observed, and upper limits on the production cross sections times branching fractions are set. In two models that predict Z-boson spin correlations in graviton decays, graviton masses are excluded lower than a value which varies between 610 and 945 GeV, depending on the model and the strength of the graviton couplings. © 2012 CERN. |
Formato |
1208-1228 |
Identificador |
http://dx.doi.org/10.1016/j.physletb.2012.11.063 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 718, n. 4-5, p. 1208-1228, 2013. 0370-2693 http://hdl.handle.net/11449/74426 10.1016/j.physletb.2012.11.063 WOS:000314554300010 2-s2.0-84872458921 2-s2.0-84872458921.pdf |
Idioma(s) |
eng |
Relação |
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Direitos |
openAccess |
Palavras-Chave | #CMS #Graviton #Kaluza-Klein #Physics |
Tipo |
info:eu-repo/semantics/article |