t→cg and t→cZ in universal extra-dimensional models

. In this work we perform a complete one-loop calculation of the flavor-changing top quark decays t → c g and t → c Z in the universal extra-dimensional models. We find that the branching ratios of these decays in the minimal scenario remain unaltered from the Standard Model expectations for current...

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Bibliographic Details
Published in:European physical journal plus 2019-05, Vol.134 (5), p.210
Main Authors: Chiang, Cheng-Wei, Kumar Dey, Ujjal, Jha, Tapoja
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Atomic
Complex Systems
Condensed Matter Physics
Couplings
Flavor (particle physics)
Mathematical and Computational Physics
Molecular
Optical and Plasma Physics
Phenomenology
Physics
Physics and Astronomy
Quarks
Regular Article
Standard model (particle physics)
Symmetry
Theoretical
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Summary:. In this work we perform a complete one-loop calculation of the flavor-changing top quark decays t → c g and t → c Z in the universal extra-dimensional models. We find that the branching ratios of these decays in the minimal scenario remain unaltered from the Standard Model expectations for currently allowed values of the inverse compactification radius. In the non-minimal setup, the branching ratios can be enhanced from the Standard Model due to the presence of boundary localized terms which modify the mass spectrum and couplings in the theory in a non-trivial way. We also check the compatibility of the parameter choices that result in enhancements in these rare decays with other experimental observations.
ISSN:2190-5444
DOI:10.1140/epjp/i2019-12607-1