Probing the top-quark width through ratios of resonance contributions of

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).In this paper we propose a method to gain access to the top-quark width which exploits off-shell regions in the process ... Working at next-to-leading order in QCD we show that carefully selected ratios of off-shell regions...

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Published inThe journal of high energy physics Vol. 2016; no. 3; pp. 1 - 32
Main Authors Liebler, Stefan, Moortgat-Pick, Gudrid, Papanastasiou, Andrew S
Format Journal Article
LanguageEnglish
Published 01.03.2016
Subjects
Beams (radiation)
Coupling
Gain
Invariants
Mass spectra
Mass spectroscopy
Quantum chromodynamics
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Summary:(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).In this paper we propose a method to gain access to the top-quark width which exploits off-shell regions in the process ... Working at next-to-leading order in QCD we show that carefully selected ratios of off-shell regions to on-shell regions in the reconstructed top and anti-top invariant mass spectra are, independently of the coupling g sub(tbW), sensitive to the top-quark width. We explore this approach for different centre of mass energies and initial-state beam polarisations at e super(+) e super(-) colliders and briefly comment on the applicability of this method for a measurement of the top-quark width at the LHC.
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ISSN:1029-8479
DOI:10.1007/JHEP03(2016)099