1. B and K rare decays constraints on top quark FCNCs
楊亞東
華中師範大學
合作者：李新強，袁興博

2. 1. Precision Flavor Physics
The successful running of and have established:
the CP violation picture of CKM
the GIM mechanism of Flavor Changing Neutral
Currents(FCNC)
leave small room for New Physics beyond the SM
The mall room:
strong constraints on New Physics scenarios already
could be very significant if precision increased
sensitive to new physics at scale>14TeV

3. 1.Precision Flavor Physics
Flavor physics is entering a precision era:
LHCb is running
Super Japan (2014 taking data)
Frascati, Italy (2015 taking data?)
Luminosity will increased by 100 times than BABAR&BELLE
The transition from the 1st generation B factories to the super ones:
Quest for CPV
Quest for New Physics
Strongly correlated with the direct searches
@ATLAS,CMS…

4. 2. Top FCNCs and B, K decays Top quark FCNS:
Clear signature, if they are there
However, highly GIM suppressed
At designed luminosity at 14TeV, LHC will only produce:
80 million top pairs and 34 million single tops annually.
So, observation of top FCNC would be the evidence for NP.
many model dependent and model independent
studies of theses decays.

5. 2.1 Model independent top FCNC couplings
NLO QCD corrections have been finished by C.S Li group:
PRL102(2009)072001;PRD82(2010) etc.
What are the bounds on these effective coupling strength?