Top-quark couplings to TeV resonances at future lepton colliders

T Han, Y. J. Kim, A. Likhoded, G. Valencia

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Abstract

We study the processes WLWL→tt̄ and WLZL→tb̄(t̄b) at future lepton colliders as probes of the couplings of the top quark to resonances at the TeV scale. We consider the cases in which the dominant low energy feature of a strongly interacting electroweak symmetry breaking sector is either a scalar or a vector resonance with mass near 1 TeV. We find that future lepton colliders with high energy and high luminosity have great potential to sensitively probe these physics scenarios. In particular, at a 1.5 TeV linear collider with an integrated luminosity of 200 fb-1, we expect about 120 events for either a scalar or a vector to decay to tt̄,tb. Their leading partial decay widths, which characterize the coupling strengths, can be statistically determined to about 10% level.

Original languageEnglish
Pages (from-to)415-437
Number of pages23
JournalNuclear Physics B
Volume593
Issue number3
DOIs
Publication statusPublished - 22 Jan 2001
Externally publishedYes

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