Journal
PHYSICAL REVIEW D
Volume 90, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.113007
Keywords
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Funding
- Fundacao para a Ciencia e Tecnologia, FCT [CERN/FP/123619/2011, SFRH/BI/52524/2014, IF/00050/2013]
- LIP-Laboratorio de Instrumentacao e Fisica Experimental de Particulas, Portugal [PestIC/FIS/LA007/2013]
- CRUP (Conselho de Reitores das Universidades Portuguesas) through Accao integrada [E 2/09]
- MAP-Fis Program
- Fundação para a Ciência e a Tecnologia [CERN/FP/123619/2011] Funding Source: FCT
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The Wtb vertex structure and the search for new anomalous couplings is studied using top quark measurements obtained at the LHC, for a center-of-mass energy of 8 TeV. By combining the latest and most precise results on the single top quark production cross section and the measurements of the W-boson helicity fractions (F-0 and F-L), it is possible to set new limits, at a 95% C.L., on the real and imaginary components of the new couplings. The combination of the LHC observables clearly improves the limits obtained when using the individual results alone. The updated measurements of the W-boson helicity fractions and the s + t channels' electroweak single top quark production, at the Tevatron, improve the LHC limits when a world combination of all observables (LHC + Tevatron) is performed.
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