PoS - Proceedings of Science
Volume 376 - Corfu Summer Institute 2019 "School and Workshops on Elementary Particle Physics and Gravity" (CORFU2019) - Workshop on Connecting Insights in Fundamental Physics: Standard Model and Beyond
Evasive maneuvers for a sequential fourth generation to circumvent the Higgs data
D. Das
Full text: pdf
Published on: August 18, 2020
So far, we have been unable to determine the sign of the down-type Yukawa couplings from the current Higgs data. We use this freedom to accommodate extra generations of fermions that obtain their masses through the exact same mechanism as the first three generations. Our recipe successfully hides the extra fermionic generations not only in the Higgs boson production through gluon fusion, but also in the loop induced Higgs decays like $h \to \gamma\gamma$ and $h \to Z\gamma$. We also illustrate how such hidden extra generation of fermions may unravel themselves in the di-Higgs production mechanisms.
DOI: https://doi.org/10.22323/1.376.0011
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