Diophantine approximation by primes and Landau--Siegel zeros

Source abstract

Let $α>0$ be an irrational number of finite type and let $β\in\mathbb{R}$. Assuming the infinitude of Siegel zeros (respectively, sufficiently strong Siegel zeros), we show that for every sufficiently small $\varepsilon>0$, there exist infinitely many primes $p$ such that $$\begin{gather*} \|αp+β\|\leq p^{-1/3+\varepsilon} \qquad\text{(respectively, }\|αp+β\|\leq p^{-1/3-1/20}\text{)}. \end{gather*}$$