Rough averages of triangular Hilbert transforms

We study a bilinear singular integral operator obtained by taking rough averages of certain directional variants of the triangular Hilbert transform.

This operator can be interpreted as the twisted paraproduct with a rough homogeneous kernel.

Under a balance condition on the $L^q$ integrability of the kernel on the unit sphere, we establish a range of $L^{p_1} \times L^{p_2} \rightarrow L^p$ bounds for this operator.

Our results are optimal within the known boundedness range for the twisted paraproduct with a smooth kernel.