Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Parallel: Beyond the Standard Model
Extra Yukawas: Searching for New Scalars via Triple-Top Signature
T. Modak
Full text: pdf
Published on: August 02, 2019
Abstract
The study of top quark is one of the major program at LHC. Essentially being a top factory, LHC provides a unique opportunity to study multi-top productions. In the Standard Model (SM), the single-top, $t \bar t$ and four-top production cross sections are very large and well over pb level, while the triple-top is few fb. Any enhancement in triple-top production would be intriguing. This may be realized in the Two-Higgs-Doublet-Model (2HDM) without a discrete $Z_2$ symmetry, where both the doublets couple to the up- and down-type quarks. After diagonalization of the fermion mass matrices, two different Yukawas $\kappa_{f}$ and $\rho_{f}$ emerge, where $\kappa_{f}$ is diagonal and real, however, $\rho_{f}$ is in general non-diagonal and complex. Extra Yukawas $\rho_{tt}$ and $\rho_{tc}$ with $\mathcal{O}(1)$ magnitude can enhance the cross section of triple-top process to pb level. In this proceeding we discuss the discovery potential of new scalars via two novel signatures: $cg\to t H^0/ tA^0\to t t \bar c$ (same-sign top) and $cg\to t H^0/ tA^0\to t t \bar t$ (triple-top) at LHC. Discovery may shed light on the Baryon Asymmetry of the Universe.
DOI: https://doi.org/10.22323/1.340.0058
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access