Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/100/18190
Title: New-physics signals of a model with a vector-singlet up-type quark
Authors: ALOK, AK
BANERJEE, S
KUMAR, D
SANKAR, SU
LONDON, D
Keywords: Top-Quark
Pp Collisions
Rare Decays
Atlas Detector
Root-S=7 Tev
Form-Factors
Lhcb Data
Search
Standard
Parametrization
Issue Date: 2015
Publisher: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW D, 92(1)
Abstract: The VuQ model involves the addition of a vector isosinglet up-type quark to the standard model. In this model the full Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix is 4 x 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 strongly constrained. There are no hints of NP in the CKM matrix, and any VuQ contributions to loop-level flavor-changing b -> s, b -> d and s -> d transitions are very small. There can be significant enhancements of the branching ratios of the flavor-changing decays t -> uZ and t -> cZ, but these are still below present detection levels.
URI: http://dx.doi.org/10.1103/PhysRevD.92.013002
http://dspace.library.iitb.ac.in/jspui/handle/100/18190
ISSN: 1550-7998
1550-2368
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