Jul 4 – 11, 2018
Asia/Seoul timezone

Top-quark physics at the Future Circular Colliders

Jul 7, 2018, 6:15 PM
209 (COEX, Seoul)


COEX, Seoul

Parallel Top Quark and Electroweak Physics Top Quark and Electroweak Physics


Clement Helsens (CERN)


The FCC-ee project includes a running time at and above the top pair production threshold.
The collection of about 0.2 ab-1 at the tt threshold would allow the most precise measurement of the top mass with about 10 MeV of statistical accuracy. The threshold region can also be used to measure the top width and extract an indirect value of the top Yukawa coupling. A second running phase will collect about 1.5ab-1 of data at sqrt(s)=365 GeV with a luminosity of 3x10^34. The million of tops produced will be used for the measurement of the top quark electroweak coupling to the photon and the Z with a precision around or below the per-cent level. This precision can be reached with the sole angular and momentum distributions of the lepton arising from semi-leptonic decays in top anti-top events, and can be further improved with other observables.
New improved estimates of the limits for FCNC processes in top events can also be obtained using both the top pair produced events at 365 GeV along with the anomalous production of single top via FCNC at the sqrt(s)=240 GeV of the Higgs running phase.

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