Top Quarks, Axigluons and Charge Asymmetries at Hadron Colliders

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dc.creatorAntunano, Oscar
dc.creatorKuhn, Johann H.
dc.creatorRodrigo, German
dc.date2007-09-11
dc.date.accessioned2026-07-07T11:37:06Z
dc.date.available2026-07-07T11:37:06Z
dc.descriptionAxigluons are colored heavy neutral gauge boson that couple to quarks through an axial vector current and the same strong coupling as gluons. The most important model-independent manifestation of axigluons is the generation of a forward--backward asymmetry in top-antitop quark production at $p\bar{p}$ collisions which originates from the charge asymmetry. We update our previous analysis for the inclusive QCD induced forward--backward asymmetry and define a new observable which is more sensitive to the effect than the forward--backward asymmetry. Furthermore, we find a lower limit of 1.2 TeV at 90% C.L. on the axigluon mass from recent measurements of the asymmetry at Tevatron. Also at LHC, the charge asymmetry is sizable in suitably selected samples. We evaluate this asymmetry in the central region for different selection cuts and show that, like at Tevatron, the charge asymmetry can probe larger values of the axigluon mass than the dijet mass distribution.
dc.description13 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/0709.1652
dc.identifierhttp://arxiv.org/abs/0709.1652
dc.identifierPhys.Rev.D77:014003,2008
dc.identifierdoi:10.1103/PhysRevD.77.014003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199091
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleTop Quarks, Axigluons and Charge Asymmetries at Hadron Colliders
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