DISCRETE 2016

Sensitivity of CLIC at 380 GeV to top FCNC decay t->cH

• Speaker: Aleksander Filip Zarnecki (University of Warsaw)
• Status: Accepted
• Time:
• Abstract: In the Standard Model, FCNC top decays, possible on loop level only, are very strongly suppressed. Observation of any such decay would be a direct signature of the physics beyond SM. Large enhancements are possible in many "new physics" scenarios and the largest engancement is in most cases expected for t->cH decay. Full simulation study for CLIC was based on the WHIZARD simulation of FCNC top decays within the 2HDM(III) model. Beam polarization and beam induced background were taken into account. Top pair production events with FCNC decay t->cH can be identified based on the kinematic constrains and flavour tagging information. Due to large overlap in kinematic space with standard top pair events, final signal selection efficiency is small, at the 10% level. Expected limits on BR(t->cH)*BR(H->bb) are compared with earlier results based on parton level simulation.
• Slides