Speaker
Description
While experimental data has not ruled out the possibility of additional Higgs bosons or gauge sectors, several alternative models have been proposed to go beyond the standard model and tackle the question of hierarchy. These models predict the existence of heavy vector-like partner quarks that exhibit vector-axial (V-A) coupling, typically on the TeV scale. In this work, We focus on the unusual decays of the partner heavy quark, called $T$, into $H^\pm b$, which may compete with $W^\pm b$ decays and create a new discovery channel at the Large Hadron Collider (LHC). Using Monte Carlo (MC) simulations, we analyse the signal-to-noise ratio of $ pp\to qg\to T^{+}b\bar{b}j\to H^{+}b\bar{b}j\to W^{+}b\bar{b}j\to 1\ell+4b+1j+ E_T$, and evaluate the sensitivity of the LHC to the masses of $T$ and $H^\pm$ in the two-Higgs-doublet model (2HDM) plus the vector-like quark (VLQ) model. We take into account current and predicted luminosities, as well as theoretical and experimental bounds.
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