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    Single top quark production as a probe of anomalous tq and tqZ couplings at the FCC-ee

    Khanpour, Hamzeh and Khatabi, Sara and Yanehsari, Morteza Khatiri and Najafabadi, Mojtaba Mohammadi (2017) Single top quark production as a probe of anomalous tq and tqZ couplings at the FCC-ee. Physics Letters B, 775. pp. 25-31. ISSN 0370-2693

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    In this paper, a detailed study to probe the top quark Flavour-Changing Neutral Currents (FCNC) tqγ and tqZ at the future collider FCC-ee in two different center-of-mass energies of 240 and 350 GeV is presented. A set of useful variables are proposed and used in a multivariate technique to separate signal from Standard Model background processes. The study includes a fast detector simulation based on the delphes package to consider the detector effects. The upper limits on the FCNC branching ratios at 95% confidence level (CL) in terms of the integrated luminosity are presented. It is shown that with of integrated luminosity of data, FCC-ee would be able to exclude the effective coupling strengths above which is corresponding to branching fraction of %. We show that moving to a high-luminosity regime leads to a significant improvement on the upper bounds on the top quark FCNC couplings to a photon or a Z boson.

    Item Type: Article
    Additional Information: Published under a Creative Commons license . Cite as: Hamzeh Khanpour, Sara Khatibi, Morteza Khatiri Yanehsari, Mojtaba Mohammadi Najafabadi, Single top quark production as a probe of anomalous tqγ and tqZ couplings at the FCC-ee, Physics Letters B, Volume 775, 2017, Pages 25-31, ISSN 0370-2693, (
    Keywords: Single top quark production; probe; anomalous tqγ and tqZ couplings; FCC-ee;
    Academic Unit: Faculty of Science and Engineering > Theoretical Physics
    Item ID: 14771
    Identification Number:
    Depositing User: Hamzeh Khanpour
    Date Deposited: 09 Sep 2021 15:18
    Journal or Publication Title: Physics Letters B
    Publisher: Elsevier
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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