We present a search for a new heavy vector boson Zâ² that decays to gluons. Decays to on-shell gluons are suppressed, leading to a dominant decay mode of Zâ²âg*g. We study the case where the off-shell gluon g* converts to a pair of top quarks, leading to a final state of ttÌg. In a sample of events with exactly one charged lepton, large missing transverse momentum and at least five jets, corresponding to an integrated luminosity of 8.7fb-1 collected by the CDF II detector, we find the data to be consistent with the standard model. We set upper limits on the production cross section times branching ratio of this chromophilic Zâ² at 95% confidence level from 300 to 40 fb for Zâ² masses ranging from 400 to 1000GeV/c2, respectively. Â© 2012 American Physical Society.
|Digital Object Identifier (DOI):||10.1103/PhysRevD.86.112002|
|Codice identificativo ISI:||WOS:000311913100001|
|Codice identificativo Scopus:||2-s2.0-84870827531|
|Titolo:||Search for a heavy vector boson decaying to two gluons in ppÌ collisions at âs=1.96TeV|
|Appare nelle tipologie:||1.1 Articolo in rivista|