Search for a narrow, spin-2 resonance decaying to a pair of Z bosons in the qq??+?- final state
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
718
Journal Issue
4-5
Pages
1208-1228
Date Issued
2013
Author(s)
Abstract
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 + -) and the other into jets. An example of such a resonance is the Kaluza-Klein graviton, G KK , 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.
Type
journal article