# Large $t\to cZ$ as a Sign of Vector-Like Quarks in Light of the $W$ Mass

@inproceedings{Crivellin2022LargeC,
title={Large \$t\to cZ\$ as a Sign of Vector-Like Quarks in Light of the \$W\$ Mass},
author={Andreas Crivellin and Matthew Kirk and Teppei Kitahara and Federico Mescia},
year={2022}
}
• Published 12 April 2022
• Physics
The rare ﬂavour changing top quark decay t → cZ is a clear sign of new physics and experimentally very interesting due to the huge number of top quarks produced at the LHC. However, there are few (viable) models which can generate a sizable branching ratio for t → cZ – in fact vector-like quarks seem to be the only realistic option. In this paper, we investigate all three representations (under the Standard Model gauge group) of vector-like quarks ( U , Q 1 and Q 7 ) that can generate a sizable…
3 Citations

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