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New-physics signals of a model with a vector-singlet up-type quark

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Title New-physics signals of a model with a vector-singlet up-type quark
 
Creator ALOK, AK
BANERJEE, S
KUMAR, D
SANKAR, SU
LONDON, D
 
Subject TOP-QUARK
PP COLLISIONS
RARE DECAYS
ATLAS DETECTOR
ROOT-S=7 TEV
FORM-FACTORS
LHCB DATA
SEARCH
STANDARD
PARAMETRIZATION
 
Description 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.
 
Publisher AMER PHYSICAL SOC
 
Date 2016-01-15T08:42:10Z
2016-01-15T08:42:10Z
2015
 
Type Article
 
Identifier PHYSICAL REVIEW D, 92(1)
1550-7998
1550-2368
http://dx.doi.org/10.1103/PhysRevD.92.013002
http://dspace.library.iitb.ac.in/jspui/handle/100/18190
 
Language en