PoS - Proceedings of Science
Volume 291 - 9th International Workshop on the CKM Unitarity Triangle (CKM2016) - Parallel WG6
FCNC decays of the top quark
D. Bardhan
Full text: pdf
Pre-published on: June 05, 2017
Published on: June 13, 2017
If new physics (e.g. SUSY) does not show up as direct evidence at the
LHC, it could still be observable in FCNC processes involving the
$t$-quark. We take a close look at the process $t\to c + h/Z$ and show that
its branching ratio in the Standard Model is subject to three
mechanisms of suppression. To obtain an observable signal, one needs
to evade all these mechanisms in a theory beyond the Standard
Model. We show that a theory like the cMSSM cannot provide a big
enough enhancement. However, in a framework like $R$-parity-violating
SUSY, observable signals are a distinct possibility.
DOI: https://doi.org/10.22323/1.291.0131
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