Published online by Cambridge University Press: 20 November 2018
There are several kinds of classification problems for real hypersurfaces in complex two-plane Grassmannians ${{G}_{2}}\left( {{\mathbb{C}}^{m+2}} \right)$. Among them, Suh classified Hopf hypersurfaces in
${{G}_{2}}\left( {{\mathbb{C}}^{m+2}} \right)$ with Reeb parallel Ricci tensor in Levi–Civita connection. In this paper, we introduce the notion of generalized Tanaka–Webster
$\left( \text{GTW} \right)$ Reeb parallel Ricci tensor for Hopf hypersurfaces in
${{G}_{2}}\left( {{\mathbb{C}}^{m+2}} \right)$. Next, we give a complete classification of Hopf hypersurfaces in
${{G}_{2}}\left( {{\mathbb{C}}^{m+2}} \right)$ with
$\text{GTW}$ Reeb parallel Ricci tensor.