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2011

Gluon excitations in t tbar production at hadron colliders

Barcelo, Roberto, Carmona, Adrian, Masip, Manuel et al.

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We argue that a relatively light massive gluon with mass <= 1 TeV, small purely axial couplings to light quarks and sizable vector and axial couplings to the top quark can reproduce the large forward-backward asymmetry observed at the Tevatron without conflicting with the t tbar and the dijet invariant mass distributions measured at the Tevatron and the LHC.

We show that realistic Higgsless models with warped extra dimensions naturally fulfil all the necessary ingredients to realize this scenario.
While current data is unable to discover or exclude these heavy gluons with masses 850 GeV, they should be observed at the (7 TeV) LHC with a luminosity of the order of 300 pb^{-1}.

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