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Signatures of NP models in top FCNC decay t --> c(u) l+ l-

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arxiv 0812.0294 v2 pith:F32TUOMP submitted 2008-12-01 hep-ph hep-ex

Signatures of NP models in top FCNC decay t --> c(u) l+ l-

classification hep-ph hep-ex
keywords fcncphysicsdecaysgiveinterestingpossiblescenariossignatures
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Among other roles the LHC will play a role of the top "factory" and it will give us unique possibility to study new physics signatures in different ways. Many scenarios of new physics allow top quark FCNC decays. Using most general model independent Lagrangian of new physics we investigate possible experimental signals of new physics in t --> c(u) l+ l- FCNC top decays. We find that measurement of two possible asymmetries might give very important and interesting information of NP. It is particularly interesting to use them to discriminate among variety on NP scenarios. We consider also contributions of the interference between scalar and vector mediators of the FCNC decays.

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