Journal
PHYSICAL REVIEW D
Volume 88, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.88.094010
Keywords
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Funding
- MICINN [FPA2006-05294, FPA2010-17915, FPA2010-22163-C02-01]
- Consolider-Ingenio Program [MultiDark CSD2009-00064]
- Junta de Andalucia [FQM 101, FQM 03048, FQM 6552]
- Fundacao para a Ciencia e Tecnologia (FCT) [CERN/FP/123619/2011]
- Spanish Consejo Superior de Investigaciones Cientificas (CSIC)
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We obtain constraints on the mixing of vectorlike quarks coupling predominantly to the third generation. We consider all (seven) relevant types of vectorlike quarks, individually. The constraints are derived from oblique corrections and Z -> b (b) over bar measurements at the Large Electron-Positron (LEP) Collider and the Stanford Linear Collider. We investigate the implications of these constraints on LHC phenomenology, concerning the decays of the heavy quarks and their single production. We also explore indirect effects of heavy quark mixing in top and bottom couplings. A remarkable effect is the possibility of explaining the anomalous forward-backward asymmetry in Z -> b (b) over bar at the LEP with a hypercharge -5/6 doublet. We also study the impact of the new quarks on single Higgs production at the LHC and Higgs decay.
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