https://doi.org/10.1140/epjp/i2019-12607-1
Regular Article
and 
in universal extra-dimensional models
1
Department of Physics, National Taiwan University, 10617, Taipei, Taiwan
2
Institute of Physics, Academia Sinica, 11529, Taipei, Taiwan
3
Institute of Physics, Sachivalaya Marg, Bhubaneswar, 751005, Odisha, India
4
Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, 400085, Mumbai, India
* e-mail: ujjal@phys.ntu.edu.tw
Received:
24
October
2018
Accepted:
3
March
2019
Published online:
16
May
2019
In this work we perform a complete one-loop calculation of the flavor-changing top quark decays 
and 
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.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
