Document Detail

Flavor changing neutral coupling mediated radiative top quark decays at next-to-leading order in QCD.
MedLine Citation:
PMID:  20867366     Owner:  NLM     Status:  In-Process    
We compute the branching ratios for the rare top quark decays t→cγ and t→cZ mediated by effective flavor changing neutral couplings at next-to-leading order in QCD, including the effects due to operator mixing. After resumming contributions of the order of [α{s}log(Λ/m{t})]{n}, where Λ is the scale at which the effective operators are generated, using renormalization group methods, we compute finite matrix element corrections and study the effects of experimental kinematic cuts on the extracted branching ratios. We find that the t→cγ decay can also be used to probe the effective operators mediating t→cg processes, since the latter can naturally contribute 10% or more to the radiative decay. Conversely, any experimental signal of t→cg would indicate a natural lower bound on t→cZ, γ.
Jure Drobnak; Svjetlana Fajfer; Jernej F Kamenik
Related Documents :
16241306 - Algorithm of the finite-lattice method for high-temperature expansion of the ising mode...
18630886 - Cracks in magnetic nanocrystal films: do directional and isotropic crack patterns follo...
20866766 - Superexponential droplet fractalization as a hierarchical formation of dissipative comp...
11735936 - Roughness scaling in cyclical surface growth.
22760916 - Mesoscopic model for the simulation of large arrays of bi-magnetic core/shell nanoparti...
658026 - A laser-endoscope with direct beam coupling.
Publication Detail:
Type:  Journal Article     Date:  2010-06-24
Journal Detail:
Title:  Physical review letters     Volume:  104     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-09-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  252001     Citation Subset:  -    
J. Stefan Institute, Jamova 39, P.O. Box 3000, 1001 Ljubljana, Slovenia.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Unitarity triangle without semileptonic decays.
Next Document:  Transition in yield and azimuthal shape modification in dihadron correlations in relativistic heavy ...