Speaker
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
Description
The VuQ model involves the addition of a vector isosinglet
up-type quark to the standard model. In this model the full CKM
quark mixing matrix is $4 \times 3$. Using present flavor-physics
data, we perform a fit to this full CKM matrix, looking for signals
of new physics (NP). We find that the VuQ model is very stronly
constrained. There are no hints of NP in the CKM matrix, and any
VuQ contributions to loop-level flavor-changing $b \to s$, $b \to d$
and $s \to d$ transitions are very small. There can be significant
enhancements of the branching ratios of the flavor-changing decays
$t \to u Z$ and $t \to c Z$, but these are still below present
detection levels.
additional information
eprint number: arXiv:1504.00517
Author
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
Co-authors
Prof.
Ashutosh Kumar Alok
(Indian Institute of Technology Jodhpur)
Prof.
David London
(Universite de Montreal)
Mr
Dinesh Kumar
(University of Rajasthan)
Prof.
Subhashish Banerjee
(Indian Institute of Technology Jodhpur)
