Future lepton collider potential in the search for top quark FCNC coupling

Tizchang, Seddigheh; Khanpour, Hamzeh; Mohammadi Najafabadi, Mojtaba

doi:10.47176/ijpr.24.4.81952

Future lepton collider potential in the search for top quark FCNC coupling

Document Type : Original Article

Authors

Seddigheh Tizchang ¹

Hamzeh Khanpour ²

Mojtaba Mohammadi Najafabadi ³

¹ Department of Physics, Faculty of Science, Arak University, Arak , Iran

² -Department of Physics, University of Science and Technology of Mazandaran, Behshahr, Iran - School of Particles and Accelerators, IPM

³ School of Particles and Accelerators, IPM

https://doi.org/10.47176/ijpr.24.4.81952

Abstract

The Future Circular Collider (FCC-ee), with its clean experimental environment, high energy, and luminosity, offers a unique opportunity for the precise study of the properties and interactions of top quarks. In this study, we have investigated the potential sensitivity of the FCC-ee to flavor-changing neutral current (FCNC) processes involving top quarks using an effective Lagrangian approach. To this end, the production of top quarks in electron-positron collisions at center-of-mass energies of 240 GeV and 365 GeV has been simulated, considering the full hadronic decay of the W boson resulting from the top quark decay. The results of the analyses show that by combining these center-of-mass energies and considering integrated luminosities of 5 ab⁻¹ and 1.5 ab⁻¹, an FCNC sensitivity on the order of 10⁻⁵ can be achieved. These findings highlight the significant potential of the FCC-ee for discovering and precisely studying FCNC processes, which could contribute to a better understanding of physics beyond the Standard Model.

Keywords

Future Circular Collider (FCC-ee)

top quark

Flavor-Changing Neutral Current (FCNC)

physics Beyond the Standard Model (BSM)

Subjects

Particle Physics

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