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Paper   IPM / Particles / 13626
School of Particles and Accelerator
  Title:   Probing the top quark flavour-changing neutral current at a future electron-positron collider
  Author(s): 
1 . Hoda Hesari
2 . Hamzeh Khanpour
3 . Morteza Khatiri Yanehsari
4 . Mojtaba Mohammadi Najafabadi
  Status:   Published
  Journal: Advances in High Energy Physics
  No.:  476490
  Vol.:  2014
  Year:  2014
  Supported by:  IPM
  Abstract:
We present a study to examine the sensitivity of the future e e+ collider to the anomalous top flavour-changing neutral current (FCNC) to the gluon. To separate signal from background a multivariate analysis is performed on top-quark pair and background events, where one top quark is considered to follow the dominant Standard Model (SM) decay, tWb, and the other top decays through FCNC, tqg, where q is a u− or a c−quark. The analysis of fully-hadronic FCNC decay of the t t pair is also presented. The 95% confidence level limits on the top-quark anomalous couplings are obtained for different values of the centre-of-mass energies and integrated luminosities.


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