Diophantine approximation by primes and Landau--Siegel zeros

Abstract

Let $\alpha >0$ be an irrational number of finite type and let $\beta \in \mathbb{R}$. Assuming the infinitude of Siegel zeros (respectively, sufficiently strong Siegel zeros), we show that for every sufficiently small $\epsilon >0$, 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*}

arXiv comment15 pages