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    Direct and indirect searches for top-Higgs FCNC coupling

    Hesari, Hoda and Khanpour, Hamzeh and Najafabadi, Mojtaba Mohammadi (2015) Direct and indirect searches for top-Higgs FCNC coupling. Physical Review D, 92 (113012). ISSN 2470-0029

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    Large top-quark flavor changing through neutral currents is expected by many extensions of the standard model. Direct and indirect searches for flavor-changing neutral currents (FCNC) in the top-quark decays to an up-type quark (up, charm) and a Higgs boson are presented. We probe the observability of the top-Higgs FCNC couplings through the process e−e+→t(→ℓνℓb)¯t(→qH), where ℓ=e, μ and q reflects up and charm quarks. It is shown that the branching ratio Br (t→qH) can be probed down to 1.12×10 −3 at 95% C.L. at the center-of-mass energy of 500 GeV with an integrated luminosity of 3000fb −1. We also update the constraint on the top-Higgs FCNC coupling using the electroweak precision observables related to Z→c¯c decay.

    Item Type: Article
    Additional Information: Cite as: Hesari, H. et al. “Direct and Indirect Searches for Top-Higgs FCNC Couplings.” Physical Review D 92 (2015): 113012.
    Keywords: Direct searches; indirect searches; top-Higgs FCNC coupling;
    Academic Unit: Faculty of Science and Engineering > Theoretical Physics
    Item ID: 14758
    Identification Number:
    Depositing User: Hamzeh Khanpour
    Date Deposited: 06 Sep 2021 16:48
    Journal or Publication Title: Physical Review D
    Publisher: American Physical Society
    Refereed: No
    Funders: School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM)
    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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